Cucumis sativus
Cucumis melo
Cucumis
Cucurbitaceae
Coriandrum
Lawsonia Plant
Peronospora
Cucurbita
Cotyledon
Glutamate Synthase (NADH)
Plant Roots
Protochlorophyllide
Chromosomes, Plant
Plant Proteins
Plant Leaves
Gene Expression Regulation, Plant
Plant Growth Regulators
Hypocotyl
Plants
Chlorophyll
Books, Illustrated
Thiol-dependent degradation of protoporphyrin IX by plant peroxidases. (1/376)
Protoporphyrin IX (PP) is the last porphyrin intermediate in common between heme and chlorophyll biosynthesis. This pigment normally does not accumulate in plants because its highly photodynamic nature makes it toxic. While the steps leading to heme and chlorophylls are well characterized, relatively little is known of the metabolic fate of excess PP in plants. We have discovered that plant peroxidases can rapidly degrade this pigment in the presence of thiol-containing substrates such as glutathione and cysteine. This thiol-dependent degradation of PP by horseradish peroxidase consumes oxygen and is inhibited by ascorbic acid. (+info)Enhancer-like properties of an RNA element that modulates Tombusvirus RNA accumulation. (2/376)
Prototypical defective interfering (DI) RNAs of the plus-strand RNA virus tomato bushy stunt virus contain four noncontiguous segments (regions I-IV) derived from the viral genome. Region I corresponds to 5'-noncoding sequence, regions II and III are derived from internal positions, and region IV represents a 3'-terminal segment. We analyzed the internally located region III in a prototypical DI RNA to understand better its role in DI RNA accumulation. Our results indicate that (1) region III is not essential for DI RNA accumulation, but molecules that lack it accumulate at significantly reduced levels ( approximately 10-fold lower), (2) region III is able to function at different positions and in opposite orientations, (3) a single copy of region III is favored over multiple copies, (4) the stimulatory effect observed on DI RNA accumulation is not due to region III-mediated RNA stabilization, (5) DI RNAs lacking region III permit the efficient accumulation of head-to-tail dimers and are less effective at suppressing helper RNA accumulation, and (6) negative-strand accumulation is also significantly depressed for DI RNAs lacking region III. Collectively, these results support a role for region III as an enhancer-like element that facilitates DI RNA replication. A scanning-type mutagenesis strategy was used to define portions of region III important for its stimulatory effect on DI RNA accumulation. Interestingly, the results revealed several differences in the requirements for activity when region III was in the forward versus the reverse orientation. In the context of the viral genome, region III was found to be essential for biological activity. This latter finding defines a critical role for this element in the reproductive cycle of the virus. (+info)Conversion of cucumber linoleate 13-lipoxygenase to a 9-lipoxygenating species by site-directed mutagenesis. (3/376)
Multiple lipoxygenase sequence alignments and structural modeling of the enzyme/substrate interaction of the cucumber lipid body lipoxygenase suggested histidine 608 as the primary determinant of positional specificity. Replacement of this amino acid by a less-space-filling valine altered the positional specificity of this linoleate 13-lipoxygenase in favor of 9-lipoxygenation. These alterations may be explained by the fact that H608V mutation may demask the positively charged guanidino group of R758, which, in turn, may force an inverse head-to-tail orientation of the fatty acid substrate. The R758L+H608V double mutant exhibited a strongly reduced reaction rate and a random positional specificity. Trilinolein, which lacks free carboxylic groups, was oxygenated to the corresponding (13S)-hydro(pero)xy derivatives by both the wild-type enzyme and the linoleate 9-lipoxygenating H608V mutant. These data indicate the complete conversion of a linoleate 13-lipoxygenase to a 9-lipoxygenating species by a single point mutation. It is hypothesized that H608V exchange may alter the orientation of the substrate at the active site and/or its steric configuration in such a way that a stereospecific dioxygen insertion at C-9 may exclusively take place. (+info)Cucumber cotyledon lipoxygenase during postgerminative growth. Its expression and action on lipid bodies. (4/376)
In cucumber (Cucumis sativus), high lipoxygenase-1 (LOX-1) activity has been detected in the soluble fraction prepared from cotyledons of germinating seeds, and the involvement of this enzyme in lipid turnover has been suggested (K. Matsui, M. Irie, T. Kajiwara, A. Hatanaka [1992] Plant Sci 85: 23-32; I. Fuessner, C. Wasternack, H. Kindl, H. Kuhn [1995] Proc Natl Acad Sci USA 92: 11849-11853). In this study we have investigated the expression of the gene lox-1, corresponding to the LOX-1 enzyme. LOX-1 expression is highly coordinated with that of a typical glyoxysomal enzyme, isocitrate lyase, during the postgerminative stage of cotyledon development. In contrast, although icl transcripts accumulated in tissue during in vitro senescence, no accumulation of lox-1 mRNA could be observed, suggesting that lox-1 plays a specialized role in fat mobilization. LOX-1 is also known to be a major lipid body protein. The partial peptide sequences of purified LOX-1 and lipid body LOX-1 entirely coincided with that deduced from the lox-1 cDNA sequence. The data strongly suggest that LOX-1 and lipid body LOX-1 are derived from a single gene and that LOX-1 can exist both in the cytosol and on the lipid bodies. We constructed an in vitro oxygenation system to address the mechanism of this dual localization and to investigate the action of LOX-1 on lipids in the lipid bodies. LOX-1 cannot act on the lipids in intact lipid bodies, although degradation of lipid body proteins, either during seedling growth or by treatment with trypsin, allows lipid bodies to become susceptible to LOX-1. We discuss the role of LOX-1 in fat mobilization and its mechanism of action. (+info)Both RNA rearrangement and point mutation contribute to repair of defective chimeric viral genomes to form functional hybrid viruses in plants. (5/376)
The putative movement protein gene (p27) plus 5' and 3' flanking sequences of cucumber leaf spot aureusvirus (CLSV) was inserted into an infectious cucumber necrosis tombusvirus (CNV) cDNA clone containing a deletion in the cell-to-cell movement protein gene. Approximately 5% of plants inoculated with synthetic transcripts of two such defective chimeric CNV/CLSV cDNA clones developed systemic symptoms 7-19 days postinoculation. Reverse transcription-polymerase chain reaction and sequence analysis of virus obtained from systemically infected leaves indicated that both point mutation and RNA rearrangement (deletion) contributed to the formation of movement competent CNV/CLSV hybrid viruses. The hybrid viruses were found to accumulate to high levels in infected plants, to form stable virions, and to be mechanically transmissible. In addition, a hybrid virus that lacked 50 amino acids at the carboxyl-terminal region of CLSV p27 was still capable of facilitating CNV movement. These data provide experimental evidence for the role of CLSV p27 in viral cell-to-cell movement and demonstrate that p27 can enable efficient movement of the CNV genome. Moreover, the data show that RNA rearrangements known to occur during CNV RNA replication can contribute to rapid evolution of the CNV genome. (+info)alpha-oxidation of fatty acids in higher plants. Identification of a pathogen-inducible oxygenase (piox) as an alpha-dioxygenase and biosynthesis of 2-hydroperoxylinolenic acid. (6/376)
A pathogen-inducible oxygenase in tobacco leaves and a homologous enzyme from Arabidopsis were recently characterized (Sanz, A., Moreno, J. I., and Castresana, C. (1998) Plant Cell 10, 1523-1537). Linolenic acid incubated at 23 degrees C with preparations containing the recombinant enzymes underwent alpha-oxidation with the formation of a chain-shortened aldehyde, i.e., 8(Z),11(Z), 14(Z)-heptadecatrienal (83%), an alpha-hydroxy acid, 2(R)-hydroxy-9(Z),12(Z),15(Z)-octadecatrienoic acid (15%), and a chain-shortened fatty acid, 8(Z),11(Z),14(Z)-heptadecatrienoic acid (2%). When incubations were performed at 0 degrees C, 2(R)-hydroperoxy-9(Z),12(Z),15(Z)-octadecatrienoic acid was obtained as the main product. An intermediary role of 2(R)-hydroperoxy-9(Z), 12(Z),15(Z)-octadecatrienoic acid in alpha-oxidation was demonstrated by re-incubation experiments, in which the hydroperoxide was converted into the same alpha-oxidation products as those formed from linolenic acid. 2(R)-Hydroperoxy-9(Z),12(Z), 15(Z)-octadecatrienoic acid was chemically unstable and had a half-life time in buffer of about 30 min at 23 degrees C. Extracts of cells expressing the recombinant oxygenases accelerated breakdown of the hydroperoxide (half-life time, about 3 min at 23 degrees C), however, this was not attributable to the recombinant enzymes since the same rate of hydroperoxide degradation was observed in the presence of control cells not expressing the enzymes. No significant discrimination between enantiomers was observed in the degradation of 2(R,S)-hydroperoxy-9(Z)-octadecenoic acid in the presence of recombinant oxygenases. A previously studied system for alpha-oxidation in cucumber was re-examined using the newly developed techniques and was found to catalyze the same conversions as those observed with the recombinant enzymes, i.e. enzymatic alpha-dioxygenation of fatty acids into 2(R)-hydroperoxides and a first order, non-stereoselective degradation of hydroperoxides into alpha-oxidation products. It was concluded that the recombinant enzymes from tobacco and Arabidopsis were both alpha-dioxygenases, and that members of this new class of enzymes catalyze the first step of alpha-oxidation in plant tissue. (+info)Spider mite-induced (3S)-(E)-nerolidol synthase activity in cucumber and lima bean. The first dedicated step in acyclic C11-homoterpene biosynthesis. (7/376)
Many plant species respond to herbivory with de novo production of a mixture of volatiles that attracts carnivorous enemies of the herbivores. One of the major components in the blend of volatiles produced by many different plant species in response to herbivory by insects and spider mites is the homoterpene 4,8-dimethyl-1,3(E), 7-nonatriene. One study (J. Donath, W. Boland [1995] Phytochemistry 39: 785-790) demonstrated that a number of plant species can convert the acyclic sesquiterpene alcohol (3S)-(E)-nerolidol to this homoterpene. Cucumber (Cucumis sativus L.) and lima bean (Phaseolus lunatus L.) both produce 4,8-dimethyl-1,3(E),7-nonatriene in response to herbivory. We report the presence in cucumber and lima bean of a sesquiterpene synthase catalyzing the formation of (3S)-(E)-nerolidol from farnesyl diphosphate. The enzyme is inactive in uninfested cucumber leaves, slightly active in uninfested lima bean leaves, and strongly induced by feeding of the two-spotted spider mite (Tetranychus urticae Koch) on both plant species, but not by mechanical wounding. The activities of the (3S)-(E)-nerolidol synthase correlated well with the levels of release of 4, 8-dimethyl-1,3(E),7-nonatriene from the leaves of the different treatments. Thus, (3S)-(E)-nerolidol synthase is a good candidate for a regulatory role in the release of the important signaling molecule 4,8-dimethyl-1,3(E),7-nonatriene. (+info)Phloem long-distance transport of CmNACP mRNA: implications for supracellular regulation in plants. (8/376)
Direct support for the concept that RNA molecules circulate throughout the plant, via the phloem, is provided through the characterisation of mRNA from phloem sap of mature pumpkin (Cucurbita maxima) leaves and stems. One of these mRNAs, CmNACP, is a member of the NAC domain gene family, some of whose members have been shown to be involved in apical meristem development. In situ RT-PCR analysis revealed the presence of CmNACP RNA in the companion cell-sieve element complex of leaf, stem and root phloem. Longitudinal and transverse sections showed continuity of transcript distribution between meristems and sieve elements of the protophloem, suggesting CmNACP mRNA transport over long distances and accumulation in vegetative, root and floral meristems. In situ hybridization studies conducted on CmNACP confirmed the results obtained using in situ RT-PCR. Phloem transport of CmNACP mRNA was proved directly by heterograft studies between pumpkin and cucumber plants, in which CmNACP transcripts were shown to accumulate in cucumber scion phloem and apical tissues. Similar experiments were conducted with 7 additional phloem-related transcripts. Collectively, these studies established the existence of a system for the delivery of specific mRNA transcripts from the body of the plant to the shoot apex. These findings provide insight into the presence of a novel mechanism likely used by higher plants to integrate developmental and physiological processes on a whole-plant basis. (+info)'Cucumis sativus' is the scientific name for the vegetable we commonly know as a cucumber. It belongs to the family Cucurbitaceae and is believed to have originated in South Asia. Cucumbers are widely consumed raw in salads, pickled, or used in various culinary applications. They have a high water content and contain various nutrients such as vitamin K, vitamin C, and potassium.
'Cucumis melo' is the scientific name for a group of plants that include cantaloupes, honeydew melons, and other types of muskmelons. These are all part of the Cucurbitaceae family, which also includes cucumbers, squashes, and gourds.
The term 'Cucumis melo' is used to refer to the species as a whole, while specific varieties or cultivars within the species are given more descriptive names, such as 'Cucumis melo' var. cantalupensis for cantaloupes and 'Cucumis melo' var. inodorus for honeydew melons.
These fruits are popular for their juicy and sweet flesh, and they are often consumed fresh or used in a variety of dishes, such as salads, smoothies, and desserts. They are also rich in nutrients, including vitamins A and C, potassium, and fiber.
'Cucumis' is a genus of plants that includes various species of fruits and vegetables, such as cucumbers, melons, and gourds. The most common species in this genus are Cucumis sativus (cucumber), Cucumis melo (melon), and Cucumis metuliferus (horned melon or kiwano). These plants are native to warm temperate and tropical regions of the world, and they are widely cultivated for their edible fruits.
Cucumis species are annual or perennial herbaceous vines that can grow quite large, with some varieties trailing up to 10 feet or more in length. They have large, lobed leaves and produce yellow or white flowers that develop into the characteristic fruit. The fruits of Cucumis plants are typically fleshy and contain numerous seeds enclosed in a thin skin.
Cucumis fruits are popular for their refreshing taste and high water content, making them a staple ingredient in many cuisines around the world. They are also rich in nutrients such as vitamin C, potassium, and fiber, and have been used in traditional medicine to treat various health conditions.
In summary, 'Cucumis' is a genus of plants that includes several species of fruits and vegetables, known for their refreshing taste, high water content, and nutritional benefits.
"Raphanus" is the genus name for a group of plants that include the common radish. The black radish (*Raphanus sativus* var. *niger*) and the white radish (also known as daikon or *Raphanus sativus* var. *longipinnatus*) are examples of species within this genus. These plants belong to the family Brassicaceae, which also includes vegetables such as broccoli, cabbage, and kale. The roots, leaves, and seeds of Raphanus plants have been used in traditional medicine for various purposes, including as a digestive aid and to treat respiratory conditions. However, it is essential to consult with a healthcare professional before using these plants or their extracts for medicinal purposes, as they can interact with certain medications and may cause side effects.
Cucurbitaceae is the scientific name for the gourd family of plants, which includes a variety of vegetables and fruits such as cucumbers, melons, squashes, and pumpkins. These plants are characterized by their trailing or climbing growth habits and their large, fleshy fruits that have hard seeds enclosed in a protective coat. The fruits of these plants are often used as food sources, while other parts of the plant may also have various uses such as medicinal or ornamental purposes.
I have searched through various medical and scientific databases, and I cannot find a specific medical definition for "Crocus." Crocus is actually the name of a genus of flowering plants in the iris family. The most commonly known species is the saffron crocus (Crocus sativus), which produces the spice saffron.
While there are no direct medical definitions for "Crocus," some compounds derived from certain Crocus species have been studied for their potential medicinal properties. For example, safranal and crocin, both found in saffron, have been investigated for their possible benefits in treating conditions like depression, PMS symptoms, and age-related macular degeneration. However, more research is needed to confirm these effects and establish recommended dosages.
In summary, "Crocus" generally refers to a genus of flowering plants, with some species' compounds having potential medicinal properties. It does not have a specific medical definition on its own.
'Coriandrum' is the medical term for a plant species that belongs to the family Apiaceae, also known as the carrot or parsley family. The most common and well-known member of this genus is Coriandrum sativum, which is commonly referred to as coriander or cilantro.
Coriander has been used for centuries in cooking and traditional medicine. Both its leaves and seeds have a distinct aroma and flavor that are widely used in various cuisines around the world. The leaves are often called cilantro, especially in North America, while the seeds are known as coriander.
In addition to its culinary uses, coriander has been reported to possess several medicinal properties. It has been traditionally used to treat digestive disorders such as nausea, bloating, and flatulence. Some studies suggest that coriander may have antimicrobial, anti-inflammatory, and antioxidant effects, although more research is needed to confirm these potential benefits.
It's worth noting that while 'Coriandrum' is a medical term for the plant genus, it is not typically used in clinical or medical contexts unless discussing its medicinal properties or potential therapeutic applications.
I'm sorry for any confusion, but "Lawsonia plant" is not a recognized medical term. Lawsonia inermis, also known as the henna plant, is sometimes used in traditional medicine and body adornment, but it is not a term that would be found in a standard medical dictionary or resource.
The Lawsonia plant contains lawsone, a natural dye that has been used for centuries to stain skin, hair, nails, and wool a reddish-brown color. In some traditional medicine systems, Lawsonia inermis is used as a remedy for conditions such as headache, fever, burns, and skin diseases. However, it's important to note that the use of Lawsonia inermis as a medical treatment has not been widely studied in clinical trials, and its effectiveness and safety are not established by modern medical research.
If you have any questions about the use of Lawsonia inermis or other natural products in medicine, I would recommend consulting with a qualified healthcare provider who can provide guidance based on your individual health needs and circumstances.
"Peronospora" is a genus of oomycetes, which are organisms that were once classified as fungi but are now known to be more closely related to brown algae and diatoms. These microorganisms are commonly known as downy mildews and can cause significant damage to crops and plants.
Peronospora species are obligate parasites, meaning they require a living host to complete their life cycle. They infect plant tissues through the production of spores that are disseminated by wind or water. Once inside the plant, the spores germinate and produce feeding structures called haustoria that penetrate the plant cells and absorb nutrients.
Peronospora infections can cause a range of symptoms in plants, including leaf spots, stem lesions, and stunted growth. In severe cases, the entire plant may be killed. Some Peronospora species are also known to produce toxins that can further damage the plant.
In medical terms, Peronospora infections are not typically considered a direct threat to human health. However, they can have significant economic impacts on agriculture and food production, which can indirectly affect human health by reducing the availability and increasing the cost of fresh produce. Additionally, some Peronospora species are known to infect medical plants, which could potentially lead to contamination of medical products.
"Lathyrus" is a genus of plants, also known as "peavines" or "sweet peas." While not a medical term itself, certain species of Lathyrus contain a toxin called beta-N-oxalyl-L-alpha,beta-diaminopropionic acid (ODAP) that can cause a neurological disorder known as lathyrism if consumed in large quantities. This condition is characterized by the degeneration of nerve cells and can lead to muscle spasticity and paralysis. However, it's important to note that this is not a common occurrence and typically only happens under conditions of severe malnutrition or famine when these plants are used as a primary food source.
Ascorbate oxidase is an enzyme that catalyzes the oxidation of ascorbic acid (vitamin C) to dehydroascorbic acid in the presence of oxygen. This reaction also results in the production of water and hydrogen peroxide as byproducts. Ascorbate oxidase plays a significant role in regulating the levels of ascorbic acid in plants, where it is primarily found. It belongs to the family of copper-containing oxidoreductases. The enzyme's active site contains two copper ions that facilitate the electron transfer during the catalytic process. Ascorbate oxidase is not considered essential for human health since humans do not produce ascorbic acid and must obtain it through dietary sources.
'Cucurbita' is a genus of herbaceous vines in the gourd family, Cucurbitaceae. This genus includes several species of plants that are commonly known as squashes or gourds, such as pumpkins, zucchinis, and acorn squashes. The fruits of these plants are widely cultivated and consumed for their nutritional value and versatility in cooking.
The name 'Cucurbita' comes from the Latin word for "gourd" or "pumpkin." Plants in this genus are native to the Americas, with some species originating in Mexico and Central America and others in the southern United States. They have been cultivated by humans for thousands of years and are an important part of many traditional diets around the world.
In a medical context, 'Cucurbita' may be mentioned in relation to the use of certain species as traditional remedies or in nutritional studies. For example, pumpkin seeds have been used in traditional medicine to treat parasitic infections, and some research suggests that they may have anti-inflammatory and antioxidant properties. However, it is important to note that the scientific evidence for these potential health benefits is still limited, and more research is needed before any firm conclusions can be drawn.
A cotyledon is a seed leaf in plants, which is part of the embryo within the seed. Cotyledons are often referred to as "seed leaves" because they are the first leaves to emerge from the seed during germination and provide nutrients to the developing plant until it can produce its own food through photosynthesis.
In some plants, such as monocotyledons, there is only one cotyledon, while in other plants, such as dicotyledons, there are two cotyledons. The number of cotyledons is a characteristic that is used to classify different types of plants.
Cotyledons serve important functions during the early stages of plant growth, including providing energy and nutrients to the developing plant, protecting the embryo, and helping to anchor the seed in the soil. Once the plant has established its root system and begun to produce true leaves through photosynthesis, the cotyledons may wither or fall off, depending on the species.
A plant root is not a medical term per se, but it is a term from botany, which is the study of plants. However, I can certainly provide a definition for you.
Plant roots are the underground organs of a plant that typically grow downward into the soil. They serve several important functions, including:
1. Anchorage: Roots help to stabilize the plant and keep it upright in the ground.
2. Absorption: Roots absorb water and nutrients from the soil, which are essential for the plant's growth and development.
3. Conduction: Roots conduct water and nutrients up to the above-ground parts of the plant, such as the stem and leaves.
4. Vegetative reproduction: Some plants can reproduce vegetatively through their roots, producing new plants from root fragments or specialized structures called rhizomes or tubers.
Roots are composed of several different tissues, including the epidermis, cortex, endodermis, and vascular tissue. The epidermis is the outermost layer of the root, which secretes a waxy substance called suberin that helps to prevent water loss. The cortex is the middle layer of the root, which contains cells that store carbohydrates and other nutrients. The endodermis is a thin layer of cells that surrounds the vascular tissue and regulates the movement of water and solutes into and out of the root. The vascular tissue consists of xylem and phloem, which transport water and nutrients throughout the plant.
Protochlorophyllide is a pigment involved in the process of photosynthesis. It is a precursor to chlorophyll, which is the main pigment responsible for light absorption during photosynthesis. Protochlorophyllide is present in the chloroplasts of plant cells and certain types of algae. It is converted to chlorophyllide by the action of light during the process of photoactivation, which is the activation of a chemical reaction by light. Defects in the biosynthesis of protochlorophyllide can lead to certain types of genetic disorders that affect photosynthesis and plant growth.
Chromosomes in plants are thread-like structures that contain genetic material, DNA, and proteins. They are present in the nucleus of every cell and are inherited from the parent plants during sexual reproduction. Chromosomes come in pairs, with each pair consisting of one chromosome from each parent.
In plants, like in other organisms, chromosomes play a crucial role in inheritance, development, and reproduction. They carry genetic information that determines various traits and characteristics of the plant, such as its physical appearance, growth patterns, and resistance to diseases.
Plant chromosomes are typically much larger than those found in animals, making them easier to study under a microscope. The number of chromosomes varies among different plant species, ranging from as few as 2 in some ferns to over 1000 in certain varieties of wheat.
During cell division, the chromosomes replicate and then separate into two identical sets, ensuring that each new cell receives a complete set of genetic information. This process is critical for the growth and development of the plant, as well as for the production of viable seeds and offspring.
"Plant proteins" refer to the proteins that are derived from plant sources. These can include proteins from legumes such as beans, lentils, and peas, as well as proteins from grains like wheat, rice, and corn. Other sources of plant proteins include nuts, seeds, and vegetables.
Plant proteins are made up of individual amino acids, which are the building blocks of protein. While animal-based proteins typically contain all of the essential amino acids that the body needs to function properly, many plant-based proteins may be lacking in one or more of these essential amino acids. However, by consuming a variety of plant-based foods throughout the day, it is possible to get all of the essential amino acids that the body needs from plant sources alone.
Plant proteins are often lower in calories and saturated fat than animal proteins, making them a popular choice for those following a vegetarian or vegan diet, as well as those looking to maintain a healthy weight or reduce their risk of chronic diseases such as heart disease and cancer. Additionally, plant proteins have been shown to have a number of health benefits, including improving gut health, reducing inflammation, and supporting muscle growth and repair.
I believe there may be a slight misunderstanding in your question. "Plant leaves" are not a medical term, but rather a general biological term referring to a specific organ found in plants.
Leaves are organs that are typically flat and broad, and they are the primary site of photosynthesis in most plants. They are usually green due to the presence of chlorophyll, which is essential for capturing sunlight and converting it into chemical energy through photosynthesis.
While leaves do not have a direct medical definition, understanding their structure and function can be important in various medical fields, such as pharmacognosy (the study of medicinal plants) or environmental health. For example, certain plant leaves may contain bioactive compounds that have therapeutic potential, while others may produce allergens or toxins that can impact human health.
I'm sorry for any confusion, but "seedling" is not a term that has a specific medical definition. It is an agricultural and horticultural term that refers to a young plant grown from a seed, typically during the early stages of its growth. If you have any questions related to health or medicine, I'd be happy to try to help with those!
Gene expression regulation in plants refers to the processes that control the production of proteins and RNA from the genes present in the plant's DNA. This regulation is crucial for normal growth, development, and response to environmental stimuli in plants. It can occur at various levels, including transcription (the first step in gene expression, where the DNA sequence is copied into RNA), RNA processing (such as alternative splicing, which generates different mRNA molecules from a single gene), translation (where the information in the mRNA is used to produce a protein), and post-translational modification (where proteins are chemically modified after they have been synthesized).
In plants, gene expression regulation can be influenced by various factors such as hormones, light, temperature, and stress. Plants use complex networks of transcription factors, chromatin remodeling complexes, and small RNAs to regulate gene expression in response to these signals. Understanding the mechanisms of gene expression regulation in plants is important for basic research, as well as for developing crops with improved traits such as increased yield, stress tolerance, and disease resistance.
Plant growth regulators (PGRs) are natural or synthetic chemical substances that, when present in low concentrations, can influence various physiological and biochemical processes in plants. These processes include cell division, elongation, and differentiation; flowering and fruiting; leaf senescence; and stress responses. PGRs can be classified into several categories based on their mode of action and chemical structure, including auxins, gibberellins, cytokinins, abscisic acid, ethylene, and others. They are widely used in agriculture to improve crop yield and quality, regulate plant growth and development, and enhance stress tolerance.
DNA, or deoxyribonucleic acid, is the genetic material present in the cells of all living organisms, including plants. In plants, DNA is located in the nucleus of a cell, as well as in chloroplasts and mitochondria. Plant DNA contains the instructions for the development, growth, and function of the plant, and is passed down from one generation to the next through the process of reproduction.
The structure of DNA is a double helix, formed by two strands of nucleotides that are linked together by hydrogen bonds. Each nucleotide contains a sugar molecule (deoxyribose), a phosphate group, and a nitrogenous base. There are four types of nitrogenous bases in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T). Adenine pairs with thymine, and guanine pairs with cytosine, forming the rungs of the ladder that make up the double helix.
The genetic information in DNA is encoded in the sequence of these nitrogenous bases. Large sequences of bases form genes, which provide the instructions for the production of proteins. The process of gene expression involves transcribing the DNA sequence into a complementary RNA molecule, which is then translated into a protein.
Plant DNA is similar to animal DNA in many ways, but there are also some differences. For example, plant DNA contains a higher proportion of repetitive sequences and transposable elements, which are mobile genetic elements that can move around the genome and cause mutations. Additionally, plant cells have cell walls and chloroplasts, which are not present in animal cells, and these structures contain their own DNA.
A hypocotyl is not a medical term per se, but it is a term used in the field of botany, which is a branch of biology that deals with the study of plants. Therefore, I'd be happy to provide you with a definition of hypocotyl in a botanical context:
The hypocotyl is the portion of the embryo or seedling of a plant that lies between the cotyledons (the embryonic leaves) and the radicle (the embryonic root). In other words, it is the stem-like structure that connects the shoot and the root systems in a developing plant.
When a seed germinates, the hypocotyl elongates and pushes the cotyledons upward through the soil, allowing the young plant to emerge into the light. The hypocotyl can vary in length depending on the species of plant, and its growth is influenced by various environmental factors such as light and temperature.
While the term "hypocotyl" may not be commonly used in medical contexts, understanding basic botanical concepts like this one can still be useful for healthcare professionals who work with patients who have plant-related allergies or other health issues related to plants.
I apologize for any confusion, but "plants" is not a term that has a medical definition. The term "plants" refers to a large and diverse group of organisms that obtain their energy through photosynthesis, which is the process of converting sunlight into chemical energy. Plants are typically characterized by having cells with cell walls containing cellulose, chloroplasts containing the pigment chlorophyll, and the ability to synthesize their own food through photosynthesis.
In a medical or biological context, you might be thinking of "plant-based" or "phytomedicine," which refer to the use of plants or plant extracts as a form of medicine or treatment. Phytomedicines have been used for thousands of years in many traditional systems of medicine, and some plant-derived compounds have been found to have therapeutic benefits in modern medicine as well. However, "plants" itself does not have a medical definition.
A plant genome refers to the complete set of genetic material or DNA present in the cells of a plant. It contains all the hereditary information necessary for the development and functioning of the plant, including its structural and functional characteristics. The plant genome includes both coding regions that contain instructions for producing proteins and non-coding regions that have various regulatory functions.
The plant genome is composed of several types of DNA molecules, including chromosomes, which are located in the nucleus of the cell. Each chromosome contains one or more genes, which are segments of DNA that code for specific proteins or RNA molecules. Plants typically have multiple sets of chromosomes, with each set containing a complete copy of the genome.
The study of plant genomes is an active area of research in modern biology, with important applications in areas such as crop improvement, evolutionary biology, and medical research. Advances in DNA sequencing technologies have made it possible to determine the complete sequences of many plant genomes, providing valuable insights into their structure, function, and evolution.
A gene in plants, like in other organisms, is a hereditary unit that carries genetic information from one generation to the next. It is a segment of DNA (deoxyribonucleic acid) that contains the instructions for the development and function of an organism. Genes in plants determine various traits such as flower color, plant height, resistance to diseases, and many others. They are responsible for encoding proteins and RNA molecules that play crucial roles in the growth, development, and reproduction of plants. Plant genes can be manipulated through traditional breeding methods or genetic engineering techniques to improve crop yield, enhance disease resistance, and increase nutritional value.
Chlorophyll is a green pigment found in the chloroplasts of photosynthetic plants, algae, and some bacteria. It plays an essential role in light-dependent reactions of photosynthesis by absorbing light energy, primarily from the blue and red parts of the electromagnetic spectrum, and converting it into chemical energy to fuel the synthesis of carbohydrates from carbon dioxide and water. The structure of chlorophyll includes a porphyrin ring, which binds a central magnesium ion, and a long phytol tail. There are several types of chlorophyll, including chlorophyll a and chlorophyll b, which have distinct absorption spectra and slightly different structures. Chlorophyll is crucial for the process of photosynthesis, enabling the conversion of sunlight into chemical energy and the release of oxygen as a byproduct.
"Illustrated books" is a general term used to describe books that contain various forms of visual content such as images, diagrams, charts, maps, graphics, and photographs. These visual elements are used to supplement or enhance the written text and make the information more engaging, accessible, and easier to understand for readers.
In medical publishing, illustrated books can cover a wide range of topics, including anatomy, physiology, pathology, clinical procedures, surgical techniques, patient education materials, and more. They are often used as educational resources for medical students, healthcare professionals, researchers, and patients to learn about various medical concepts, conditions, and treatments.
Illustrated books in the medical field can come in different formats, such as hardcover or paperback books, e-books, and interactive digital publications. The quality and accuracy of the visual content are crucial for medical illustrations, as they need to be scientifically accurate, visually appealing, and consistent with the text they accompany. Medical illustrators, graphic designers, and other professionals often work together to create these resources, ensuring that the final product is both informative and engaging.
A plant disease is a disorder that affects the normal growth and development of plants, caused by pathogenic organisms such as bacteria, viruses, fungi, parasites, or nematodes, as well as environmental factors like nutrient deficiencies, extreme temperatures, or physical damage. These diseases can cause various symptoms, including discoloration, wilting, stunted growth, necrosis, and reduced yield or productivity, which can have significant economic and ecological impacts.
Cucumber
Sativum
Phytophthora hydropathica
List of Bohol flora and fauna
Pseudomonas tomato
Tomato black ring virus
Plastocyanin family of copper-binding proteins
Cucumis
List of sequenced plant genomes
Plant genome assembly
Isoptericola cucumis
Melothria scabra
Tryptophol
Indole-3-acetaldehyde reductase (NADPH)
Indole-3-acetaldehyde reductase (NADH)
Elisabeth Peveling
Cucumber (disambiguation)
List of cucumber varieties
Anthroponics
Fusarium wilt
Melon necrotic spot virus
Inositol 3-alpha-galactosyltransferase
Nannotrigona testaceicornis
Sedoheptulose-bisphosphatase
List of sequenced plastomes
Chryseobacterium cucumeris
Trichoderma harzianum
Steven A. Hill
Aluminium
Arturo A. Keller
Cucumis sativus Cucumber, Garden cucumber PFAF Plant Database
Cucumis sativus Genome DB
NameThatPlant.net: Cucumis sativus
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Cucumbers1
- In particular, the hosts include watermelons (Citrullus lanatus), cucumbers (Cucumis sativus), and melons (Cucumis melo). (wikipedia.org)
Melo4
- Cucumis melo. (reimerseeds.com)
- Melons are Cucumis melo. (adirondackdailyenterprise.com)
- These are cucumber ( Cucumis sativus L.), melon ( Cucumis melo L.), watermelon ( Citrullus lanatus (Thunb. (nature.com)
- It is considered to be an endemic virus in greenhouses and field productions of Cucurbitaceae crops, including melon (Cucumis melo), cucumber (Cucumbis sativus), and watermelon (Citrullus lanatus). (wikipedia.org)
EXTRACT1
- Cucumber Fruit Extract (Cucumis Sativus): Cucumber extract is a superfood for the skin. (ulta.com)
Cucurbitaceae1
- The cucumber (Cucumis sativus) is a widely-cultivated creeping vine plant in the family Cucurbitaceae that bears cylindrical to spherical fruits, which are used as culinary vegetables. (wikipedia.org)
Pest of cucumber3
- The Javanese root-knot nematode (JRKN, Meloidogyne javanica ) is a serious pest of cucumber ( Cucumis sativus ) grown in tropical and subtropical regions. (researchsquare.com)
- are a serious yield-limiting pest of cucumber ( Cucumis sativus L.). Two of the most damaging RKN species that infect cucumber are the southern root-knot nematode (SRKN, M. incognita) , and the Javanese root-knot nematode (JRKN, M. javanica) (Hajihassani et al. (researchsquare.com)
- are an important worldwide pest of cucumber (Cucumis sativus L.). Molecular markers linked to the Javanese root-knot nematode (M. javanica) resistance gene mj in cucumber may aid marker assisted selection. (scielo.br)
Seeds1
- Cucumis sativus About 1100 seeds per Oz. Cucumis sativus. (kitazawaseed.com)
Raphanus2
- PDF) PSM Biological Research Effect of Different Levels of Water Soluble NPK (20-20-20) Fertilizer on the Growth and Yield of White Radish (Raphanus sativus L. (researchgate.net)
- Raphanus sativus. (kitazawaseed.com)
Gene5
- BLAST-able datasets include Cucumis sativus genomic DNA, splice-aligned transcripts and proteins, gene models, and other aligned sequences. (plantgdb.org)
- Help annotate the Cucumis sativus genome using our yrGATE gene structure annotation tool ( see Overview ), aided by GAEVAL tables that flag problematic gene models. (plantgdb.org)
- The purpose of this resource is to provide a convenient sequence-centered genome view for Cucumis sativus , with a narrow focus on gene structure annotation. (plantgdb.org)
- The recessive mj resistance gene first identified in the wild cucumber ( C. sativus var. (researchsquare.com)
- hardwickii ), is the only known source of resistance to JRKN within the C. sativus gene pool. (researchsquare.com)
Annual1
- Cucumis sativus is a ANNUAL CLIMBER growing to 2 m (6ft 7in). (pfaf.org)
Garden1
- The Clemson Cooperative Extension Home and Garden Information Center has a factsheet on common cucumis diseases as well as a factsheet on common insect pests and other problems. (ncsu.edu)
Worldwide1
- Cucumber ( Cucumis sativus L.) is one of the most important commercial vegetables worldwide and has become a model plant for studying the formation and development of multicellular trichomes. (biomedcentral.com)
Cucumbers8
- Impacts of soil nutrition on floral traits, pollinator attraction, and fitness in cucumbers (Cucumis sativus L. (nature.com)
- In a controlled greenhouse study, we studied in cucumbers ( Cucumis sativus ) how changes in soil nitrogen and phosphorus influence floral traits, including nectar and pollen reward composition. (nature.com)
- Using cucumbers ( Cucumis sativus L.) and bumble bees ( Bombus impatiens C.) as a model system, we examine the influence of nitrogen and phosphorus on a suite of floral traits and how these traits influence pollinator visitation rates and plant reproductive success through fruit production. (nature.com)
- Cucumbers (Cucumis sativus) are a warm season tender annual in the Cucurbitaceae family, which includes melons, summer squash and winter squash, and gourds. (highmowingseeds.com)
- In particular, the hosts include watermelons (Citrullus lanatus), cucumbers (Cucumis sativus), and melons (Cucumis melo). (wikipedia.org)
- excellent cucumbers, melons, etc., the Cucumis chate being the best of its tribe yet known. (studylight.org)
- Known scientifically as Cucumis sativus, cucumbers are related to watermelons, zucchini and pumpkins. (gardeningchannel.com)
- Cucumber ( Cucumis sativus ) is a warm-season vegetable that grows best at temperatures between 75 and 85 °F. Cucumbers are very tender and can be killed by light frosts. (clemson.edu)
Melon1
- Genome-Wide Identification of Two-Component Signal Transduction System Genes in Melon ( Cucumis melon L. (scirp.org)
Heirloom1
- Heirloom, Cucumis sativus. (kitazawaseed.com)
Genome2
Molecular1
- Molecular markers assist in the development of diverse inbred backcross lines in European long cucumber (Cucumis sativus L. (usda.gov)
Plant1
- In cucumber (Cucumis sativus) they are important components of the herbivore-induced plant volatile blend that attracts natural enemies of herbivores. (nih.gov)
Temperature1
- The Co-Involvement of Light and Air Temperature in Regulation of Sex Expression in Monoecious Cucumber ( Cucumis sativus L. (scirp.org)
Varieties1
- Besides the Cucumis chate , the common cucumber ( Cucumis sativus ), of which the Arabs distinguish a number of varieties, is common in Egypt. (studylight.org)
Grown2
- Rice ( Oryza sativa L.) is the staple food of 60% of the world's population [ 1 ], performs a significant role in the socio-economic constancy of the world, and is grown in a vast range of agro-ecological conditions. (intechopen.com)
- Both Cucumis chate and Cucumis sativus ', says Mr. Tristram, 'are now grown in great quantities in Palestine. (studylight.org)
Disease1
- Used as a rootstock for C. sativus, conferring disease resistance[183]. (pfaf.org)
Annual1
- Cucumis metuliferus is a ANNUAL CLIMBER growing to 1.5 m (5ft). (pfaf.org)