Begoniaceae
Angiosperms
Encyclopedias as Topic
Anagallis
Hawaii
Return to Work
Cucurbitaceae
Madagascar
Placentation
Annonaceae
Antioxidant metabolism during acclimation of Begonia x erythrophylla to high light levels. (1/10)
This study examined the influence of high light levels on antioxidant metabolism and the photosynthetic properties of Begonia x erythrophylla leaves. The pigment composition of shaded leaves and those developing in full sunlight was typical of shade- and sun-leaves, respectively. After 28 d in full sunlight, the preformed leaves of shade plants transferred to full sunlight (transferred-leaves) showed photo-bleaching with lower Chl (a + b) content and Chl a : Chl b ratios than shade-leaves, with Chl (a + b) : carotenoid ratios not significantly different. The variable/maximal fluorescence (Fv/Fm) of sun-leaves was not significantly different from that of shade-leaves, but transferred-leaves had reduced Fv : Fm ratios. Light response curves for the electron transport rate (ETR), the oxidation state of photosystem II (qP) and non-photochemical quenching (NPQ) showed significant differences between the three leaf types, with transferred-leaves not able to acclimate completely to full sunlight, having lower ETR, qP and NPQ values at high light levels than sun-leaves. Transfer to full sunlight caused a rapid increase in H2O2 and lipid hyperoxides, and a slight increase in protein oxidation. Ascorbate and glutathione levels decreased rapidly, as did the size of the total glutathione pool and, in addition to the general oxidation of proteins, rapid decreases in both the initial and total activities of chloroplastic fructose-1,6-bisphosphatase and glyceraldehyde-3-phosphate dehydrogenase were observed. These results suggest that a more oxidizing cellular environment is the likely cause of the photo-bleaching observed upon transfer of shade-leaves to full sunlight. Acclimation of transferred-leaves to full sunlight involved gradual increases in the activities of enzymes involved in antioxidant metabolism, including superoxide dismutase, catalase, glutathione reductase, ascorbate peroxidase, dehydroascorbate reductase and monodehydroascorbate reductase, but the levels of these enzymes still remained at levels lower than those found in sun-leaves. (+info)Cytotoxic and anti-HIV principles from the rhizomes of Begonia nantoensis. (2/10)
Three new compounds: begonanline (1). nantoamide (2). and methyl (S)-glycerate (3). as well as forty-four known compounds have been isolated and characterized from the rhizomes of Begonia nantoensis. The structures of these compounds were determined by spectral analyses and/or X-ray crystallography. Among them, cucurbitacin B (4). dihydrocucurbitacin B (5). cucurbitacin E (6). dihydrocucurbitacin E (7). cucurbitacin I (8). and (-)-auranamide (9). showed cytotoxicity against four human cancer cell lines. 3beta,22alpha-Dihydroxyolean-12-en-29-oic acid (10), indole-3-carboxylic acid (11), 5,7-dihydroxychromone (12), and (-)-catechin (13) demonstrated significant activity against HIV replication in H9 lymphocyte cells. (+info)Following the initiation and development of individual leaf primordia at the level of the shoot apical meristem: the case of distichous phyllotaxis in Begonia. (3/10)
BACKGROUND AND AIMS: By using the technique of replicas of a developing apex it is possible to obtain a direct measure of phyllotactic parameters (plastochrone and platochronic ratio) involved in the initiation of two successive primordia at the level of the SAM. The goal of this study is to compare, in a real time setting, the value of phyllotactic parameters in distichous systems using Begonia as a case study, with the value of the same parameters in spiral phyllotactic systems. METHODS: To determine the real-time sequence of events at the level of the SAM, replicas were made of the developing apex at different intervals using previously described techniques. Impression moulds were made at 24-h intervals. The following phyllotactic parameters were measured: plastochrone, angle of divergence, plastochrone ratio and ratio between the diameter of the leaf and the apex. RESULTS: The time between the appearance of two successive leaves is 15-20 d. The average value of the plastochrone ratio (R) is 1.3, and the ratio of the leaf to the diameter of the apex (Gamma) is 2.5. The angle of divergence varies from 165 masculine to 180 masculine. The speed of advection of the primordium from the apex, varies from 0.28 to 0.37 microm d(-1). CONCLUSIONS: The speed of advection of primordia in Begonia is lower than that of Anagalis. This is not in accordance with theoretical simulations that predict the opposite. In Begonia, the plastochrone ratio does not reflect the real time of appearance of two successive primordia. The time separating the appearance of two primordia is not directly related to the distance of these two primordia from the centre of the apex but is related instead to the enlargement of leaves. (+info)Optical effects of abaxial anthocyanin on absorption of red wavelengths by understorey species: revisiting the back-scatter hypothesis. (4/10)
(+info)Meiotic aberrations during 2n pollen formation in Begonia. (5/10)
(+info)Paenibacillus jilunlii sp. nov., a nitrogen-fixing species isolated from the rhizosphere of Begonia semperflorens. (6/10)
(+info)First macrofossil record of Begonia (Begoniaceae). (7/10)
(+info)Isolation of compound microsatellite markers in Begonia fenicis (Begoniaceae) endemic to East and Southeast Asian islands. (8/10)
(+info)Begoniaceae is a family of flowering plants that includes the genus Begonia. It is part of the order Cucurbitales and contains around 1,670 species in two subfamilies: Begonioideae and Hillebrandioideae. The plants in this family are primarily found in tropical and subtropical regions of the world, with a high degree of diversity in Southeast Asia and South America.
Begoniaceae are known for their showy flowers and often asymmetrical leaves. Many species have tuberous roots or rhizomes, while others are epiphytic or climbing plants. The family is named after Michel Bégon, a French governor of Haiti who was an enthusiastic botanical collector.
The medical relevance of Begoniaceae is limited, although some species have been used in traditional medicine for various purposes, such as treating skin conditions and wounds. However, there is little scientific evidence to support these uses, and further research is needed to determine their safety and efficacy.
Angiosperms, also known as flowering plants, are a group of plants that produce seeds enclosed within an ovary. The term "angiosperm" comes from the Greek words "angeion," meaning "case" or "capsule," and "sperma," meaning "seed." This group includes the majority of plant species, with over 300,000 known species.
Angiosperms are characterized by their reproductive structures, which consist of flowers. The flower contains male and female reproductive organs, including stamens (which produce pollen) and carpels (which contain the ovules). After fertilization, the ovule develops into a seed, while the ovary matures into a fruit, which provides protection and nutrition for the developing embryo.
Angiosperms are further divided into two main groups: monocots and eudicots. Monocots have one cotyledon or embryonic leaf, while eudicots have two. Examples of monocots include grasses, lilies, and orchids, while examples of eudicots include roses, sunflowers, and legumes.
Angiosperms are ecologically and economically important, providing food, shelter, and other resources for many organisms, including humans. They have evolved a wide range of adaptations to different environments, from the desert to the ocean floor, making them one of the most diverse and successful groups of plants on Earth.
An encyclopedia is a comprehensive reference work containing articles on various topics, usually arranged in alphabetical order. In the context of medicine, a medical encyclopedia is a collection of articles that provide information about a wide range of medical topics, including diseases and conditions, treatments, tests, procedures, and anatomy and physiology. Medical encyclopedias may be published in print or electronic formats and are often used as a starting point for researching medical topics. They can provide reliable and accurate information on medical subjects, making them useful resources for healthcare professionals, students, and patients alike. Some well-known examples of medical encyclopedias include the Merck Manual and the Stedman's Medical Dictionary.
Phylogeny is the evolutionary history and relationship among biological entities, such as species or genes, based on their shared characteristics. In other words, it refers to the branching pattern of evolution that shows how various organisms have descended from a common ancestor over time. Phylogenetic analysis involves constructing a tree-like diagram called a phylogenetic tree, which depicts the inferred evolutionary relationships among organisms or genes based on molecular sequence data or other types of characters. This information is crucial for understanding the diversity and distribution of life on Earth, as well as for studying the emergence and spread of diseases.
"Anagallis" is a genus name that refers to a group of flowering plants commonly known as "pimpernels." These plants belong to the primrose family (Primulaceae) and are found in various parts of the world, including Europe, Asia, Africa, and America. The name "Anagallis" comes from the Greek word "anagelao," which means "to laugh," possibly referring to the smiling expression of the flowers.
There are around 20-30 species of Anagallis, some of which have medicinal uses. For example, Anagallis arvensis (scarlet pimpernel) has been used in traditional medicine for treating various ailments such as skin conditions, eye problems, and respiratory issues. However, it is important to note that the use of these plants as medicine should be done under the guidance of a qualified healthcare professional, as they can also have toxic effects if not used properly.
I'm sorry for any confusion, but "Hawaii" is not a medical term. It is the 50th and most recent state to have joined the United States, located in the Central Pacific. If you have any questions about medical terms or concepts, I would be happy to help answer those!
"Return to Work" (RTW) is a term used in the medical and occupational health fields to describe the process of an individual who has been unable to work due to illness or injury, returning to their previous job or a new role that accommodates their limitations. The goal of RTW is to help the individual safely and effectively reintegrate into the workforce while considering their medical condition and any restrictions or accommodations needed. This process often involves collaboration between healthcare professionals, employers, and sometimes insurance companies or vocational specialists. A successful RTW program can improve outcomes for both the employee and the employer by promoting recovery, reducing disability duration, and minimizing lost productivity.
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'm sorry for any confusion, but "flowers" is not a term that has a medical definition. The term "flowers" is commonly used to refer to the reproductive structures of flowering plants (angiosperms), which are characterized by having both male and female reproductive organs or separate male and female flowers.
If you have any questions related to medical terminology or health conditions, I would be happy to try to help answer those for you!
I'm sorry for any confusion, but "Madagascar" is not a medical term. It is actually the fourth-largest island country in the world, located in the Indian Ocean, off the southeastern coast of Africa. If you have any questions about medical terms or concepts, I'd be happy to help answer those!
I'm sorry for any confusion, but "pollination" is not a term typically used in medical definitions. Pollination is a process in biology, specifically in botany, that refers to the transfer of pollen from the male reproductive organ (anther) of a flower to the female reproductive organ (stigma) of the same or another flower, leading to fertilization and the production of fruits and seeds.
If you have any medical terms or concepts in mind, please provide them so I can offer an accurate definition or explanation.
Placentation is the process by which the placenta, an organ that provides nutrients and oxygen to the developing fetus and removes waste products, is formed and develops during pregnancy. It involves the attachment of the fertilized egg (embryo) to the uterine wall and the development of specialized structures that facilitate the exchange of gases, nutrients, and waste between the mother and the fetus.
In humans, placentation begins when the embryo implants into the endometrium, or the lining of the uterus, about 6-10 days after fertilization. The outer layer of the embryo, called the trophoblast, invades the endometrial tissue and forms a structure called the placenta.
The placenta consists of both maternal and fetal tissues. The fetal portion of the placenta is derived from the chorionic villi, which are finger-like projections that develop on the surface of the embryo and increase the surface area for exchange. The maternal portion of the placenta is made up of modified endometrial tissue called decidua.
The placenta grows and develops throughout pregnancy, providing a vital connection between the mother and fetus. Proper placentation is essential for a healthy pregnancy and fetal development. Abnormalities in placentation can lead to complications such as preeclampsia, preterm labor, and intrauterine growth restriction.
Annonaceae is a family of flowering plants, also known as custard apple family. It includes several genera and species of tropical trees and shrubs that are native to the Americas, Africa, Asia, and Australia. The plants in this family are characterized by their large, often fragrant flowers and fleshy fruits. Some of the commercially important crops in this family include cherimoya, soursop, custard apple, and pawpaw. Many species of Annonaceae have also been studied for their potential medicinal properties, including the presence of alkaloids with anticancer and anti-malarial activities.
A meristem, in the context of plant biology, refers to a type of tissue found in plants that is responsible for their growth. These tissues are composed of cells that have the ability to divide and differentiate into various specialized cell types. Meristems are typically located at the tips of roots and shoots (apical meristems), as well as within the vascular bundles (cambial meristems) and in the cork layers (phellogen meristems). They contribute to the increase in length and girth of plant organs, allowing plants to grow throughout their life.
Begoniaceae
Begonia adamsensis
Begonia quinquealata
Begonia gironellae
Begonia tabonensis
Begonia tenuibracteata
Begonia balangcodiae
Bernice Giduz Schubert
List of nitrogen-fixing-clade families
Reveal system
APG IV system
Philippine Taxonomic Initiative
Dipankar Borah
Begonia pavonina
List of organisms named after the Star Wars series
APG III system
Biodiversity of New Caledonia
Begonia baik
List of Cucurbitales of South Africa
Józef Warszewicz
List of Begonia species
Laurence Joseph Dorr
Mount Mimongo
Begonia tenuifolia
Begonia caramoanensis
Begonia samhaensis
Begonia tonkinensis
Begonia sizemoreae
Jean Marie Bosser
Begonia pearcei
Begoniaceae - Wikipedia
PDF) Taxonomic status of Begonia promethea (sect. Petermannia, Begoniaceae) in Borneo
Begoniaceae and Gesneriads Greenhouse | Space for life
The International Database of the Begoniaceae
Flora of Mozambique: Utilities: All images of Begoniaceae
Flora of Zambia: Utilities: All images of Begoniaceae
Novitates Gabonenses 86. The Begonia clypeifolia complex (Begoniaceae) unravelled
Two new species of Begonia (Begoniaceae) from Bali and Lombok
BEGONIA HEMICARDIA (SECT. PETERMANNIA, BEGONIACEAE), A RESURRECTED HETEROTYPIC SYNONYM AND NOMEN NUDUM | Edinburgh...
A NEW SPECIES OF TUBEROUS BEGONIA (BEGONIACEAE) FROM ANDEAN PERU<...
Cucurbitales
The early evolution of the mega-diverse genus Begonia (Begoniaceae) inferred from organelle DNA phylogenies<...
Begonia rieckei - Wikispecies
eFlora Search Page
Colección de plantas vasculares de Brasil del Herbario 'Jaime Andrés Rodríguez'. LEB-Brasil
Begonia Tiny Gem ( Tiny Gem Begonia ) : Backyard Gardener
Begonia lobata ( Begonia lobata ) - Backyard Gardener
Begonia wallichiana | International Plant Names Index
Index Seminum 2007 - Botanická zahrada Praha
Begonia sootepensis var. thorelii | International Plant Names Index
SEINet Portal Network - Begonia maynensis
Begonia Dragonwing [hyb]
Flora of Zimbabwe: List of cultivated plant families
The Institute for Regional Conservation
Begonia × benariensis BIG SERIES - Plant Finder
Begonia fuchsiodes or Fuchsia Begonia | Nurseries Online
Begonia8
- 2020. Begonia naga, a synonym of B. manhaoensis (Begoniaceae). (ntu.edu.tw)
- 2018. Seven new species of Begonia (Begoniaceae) in northern Vietnam and southern China. (ntu.edu.tw)
- 2019. A new berry-fruited species of Begonia (Begoniaceae) from Xizang (Tibet) in China. (ntu.edu.tw)
- The sections of Begonia including descriptions, keys, and species lists (Studies in Begoniaceae VI). (ntu.edu.tw)
- 2021. Begonia nangunheensis, a new species of Begoniaceae from Yunnan Province, China. (ntu.edu.tw)
- 2020. Begonia phouchomvoyensis (Begoniaceae), a new species from Lao PDR. (ntu.edu.tw)
- 2021. Revision of Begonia (Begoniaceae) in Bidoup-nui Ba National Park, Southern Vietnam, including two new species. (ntu.edu.tw)
- [2] Ang Begonia obtecticaulis sakop sa kahenera nga Begonia , ug kabanay nga Begoniaceae . (wikipedia.org)
Family1
- Begoniaceae is a family of flowering plants with two genera and about 2040 species occurring in the subtropics and tropics of both the New World and Old World. (wikipedia.org)
Gesneriads Greenhouse1
- Begoniaceae and Gesneriads Greenhouse: all year long! (espacepourlavie.ca)
Platycentrum4
- Platycentrum (Begoniaceae) from Yunnan, China is described and illustrated. (ntu.edu.tw)
- Platycentrum (Begoniaceae) from southern Guangxi of China. (ntu.edu.tw)
- Platycentrum (Begoniaceae) from southeastern Yunnan, China. (ntu.edu.tw)
- Platycentrum, Begoniaceae) from Northeastern India. (ntu.edu.tw)
Familia1
- Familia de plantas del orden Violales (por algunos en Begoniales), subclase Dilleniidae, clase Magnoliopsida. (bvsalud.org)
China2
- Stolonifera (Begoniaceae) in China. (ntu.edu.tw)
- Die Flora von Central-China: Begoniaceae. (ntu.edu.tw)