Meteorology
Lauraceae
Heat-Shock Proteins, Small
Ericaceae
Honey
Search for polyprenols in leaves of evergreen and deciduous Ericaceae plants. (1/39)
Various species and cultivars of Ericaceae family were checked for the presence of long-chain polyprenols in their leaves. In the genus Rhododendron no polyprenols were found in the ever-green species, while they were present in the deciduous type. The polyprenols were of chain-length of 14-20 isoprene residues and they occurred in the form of acetic acid esters. The polyprenol accumulation is discussed with respect to senescence of leaves. (+info)Genetic structure of Rhododendron ferrugineum at a wide range of spatial scales. (2/39)
Rhododendron ferrugineum L. (Ericaceae) is a subalpine shrub found throughout the Pyrenees and Alps at elevations of 1600-2200 m. We examined relationships between genetic and geographic distance, using 115 dominant amplified fragment length polymorphism (AFLP) markers to assess genetic structure over a wide range of spatial scales. We sampled 17 sites with distances of 4 km to more than 1000 km between them. At these scales we detected no association between geographic distance and genetic distance between populations. This suggests that genetic drift and gene flow are not in equilibrium for these populations. This pattern could have resulted from recent and rapid postglacial colonization, from more recent human disturbance, or as a function of frequent and random "natural" long-distance colonization. At two of our sites we used transects (two horizontal and two vertical with respect to slope at each site) to sample at distances ranging from 10 m to more than 5000 m. At this scale we observed a positive relationship between genetic and spatial distance along two vertical transects, one at each site. We hypothesize that isolation-by-distance at this smaller scale is a function of restricted gene flow via seed dispersal. (+info)Tyrosinase inhibitors from Rhododendron collettianum and their structure-activity relationship (SAR) studies. (3/39)
A new coumarinolignoid 8'-epi-cleomiscosin A (1) together with the new glycoside 8-O-beta-D-glucopyranosyl-6-hydroxy-2-methyl-4H-1-benzopyrane-4-one (2) have been isolated from the aerial parts of Rhododendron collettianum and their structures determined on the basis of spectroscopic evidences. Tyrosinase inhibition study of these compounds and their structure-activity relationship (SAR) were also investigated. The compounds exhibited potent to mild inhibition activity against the enzyme. Especially, the compound 1 showed strong inhibition (IC50=1.33 microM) against the enzyme tyrosinase, as compared to the standard tyrosinase inhibitors kojic acid (IC50=16.67 microM) and L-mimosine (IC50=3.68 microM), indicating its potential used for the treatment of hyperpigmentation associated with the high production of melanocytes. (+info)Rust fungi on rhododendrons in Asia: Diaphanopellisforrestii gen. et sp. nov., new species of Caeoma, and expanded descriptions of Chrysomyxa dietelii and C. succinea. (4/39)
Many rust fungi (Uredinales) that infect rhododendrons are difficult to identify because of similar spore size and overall morphology. As part of a morphological study of rusts in the genus Chrysomyxa, herbarium specimens of Asian rhododendron rusts were examined by light and scanning electron microscopy. They were compared with similar taxa from Europe and North America. Revised and illustrated descriptions are provided for the uredinia and telia of Chrysomyxa dietelii and Chrysomyxa succinea; details of the conspicuous uredinial peridium of both species are described for the first time. A new genus and species, Diaphanopellis forrestii, is proposed to accommodate a rust fungus with uredinia covered by a peridium of ornamented cells (Aecidium-type) and teliospores enclosed in transparent outer sheaths. This species includes the previously described anamorphs Aecidium rhododendri and A. sino-rhododendri. Three new anamorphic species with unique urediniospore morphology also are described: Caeoma clemensii from Philippines, Caeoma spinulospora from Tibet, and Caeoma yunnanensis from Yunnan, China. For morphological and nomenclatural reasons Uredo rhododendri ('rhododendronis') is renamed as Caeoma dumeticola and Uredo rhododendri-capitati is transferred to Caeoma. A key to Asian rhododendron rusts that form uredinia is provided. In general morphological groups of rhododendron rusts correlate with the subgenera of Rhododendron on which they occur, suggesting coevolution of these parasites with their hosts. (+info)Divergent evolution of the chloroplast small heat shock protein gene in the genera Rhododendron (Ericaceae) and Machilus (Lauraceae). (5/39)
BACKGROUND AND AIMS: Evolutionary and ecological roles of the chloroplast small heat shock protein (CPsHSP) have been emphasized based on variations in protein contents; however, DNA sequence variations related to the evolutionary and ecological roles of this gene have not been investigated. In the present study, a basal angiosperm, Machilus, together with the eudicot Rhododendron were used to illustrate the evolutionary dynamics of gene divergence in CPsHSPs. METHODS: Degenerate primers were used to amplify CPsHSP-related sequences from 16 Rhododendron and eight Machilus species that occur in Taiwan. Manual DNA sequence alignment was carried out according to the deduced amino acid sequence alignment performed by CLUSTAL X. A neighbour-joining tree was generated in MEGA using conceptual translated amino acid sequences from consensus sequences of cloned CPsHSP genes from eight Machilus and 16 Rhododendron species as well as amino acid sequences of CPsHSPs from five monocots and seven other eudicots acquired from GenBank. CPsHSP amino acid sequences of Funaria hygrometrica were used as the outgroups. The aligned DNA and amino acid sequences were used to estimate several parameters of sequence divergence using the MEGA program. Separate Bayesian inference of DNA sequences of Rhododendron and Machilus species was analysed and the resulting gene trees were used for detection of putative positively selected amino acid sites by the Codeml program implemented in the PAML package. Mean hydrophobicity profile analysis was performed with representative amino acid sequences for both Rhododendron and Machilus species by the Bioedit program. The computer program SplitTester was used to examine whether CPsHSPs of Rhododendron lineages and duplicate copies of the Machilus CPsHSPs have evolved functional divergence based on the hydrophobicity distance matrix. KEY RESULTS: Only one copy of the CPsHSP was found in Rhododendron. However, a higher evolutionary rate of amino acid substitutions in the Hymenanthes lineage of Rhododendron was inferred. Two positively selected amino acid sites may have resulted in higher hydrophobicity in the region of the alpha-crystallin domain (ACD) of the CPsHSP. By contrast, the basal angiosperm, Machilus, possessed duplicate copies of the CPsHSP, which also differed in their evolutionary rates of amino acid substitutions. However, no apparent relationship of ecological relevance toward the positively selected amino acid sites was found in Machilus. CONCLUSIONS: Divergent evolution was found for both Rhododendron lineages and the paralogues of CPsHSP in Machilus that were directed to the shift in hydrophobicity in the ACD and/or methionine-rich region, which might have played important roles in molecular chaperone activity. (+info)Mad honey poisoning-related asystole. (6/39)
Mad honey poisoning is well known in the eastern Black Sea region of Turkey. The cause of the poisoning is the toxin grayanotoxin, found in honey obtained from the nectar of Rhododendron species on the mountains in the region. A 60-year-old man was brought to the emergency department with dizziness and syncope after eating a few spoonfuls of honey. While the patient was being treated, bradycardia and asystole developed. The patient was given 0.5 mg of atropine, and asystole began and ended. The patient was transferred to the catheter laboratory and a temporary pacemaker was implanted. Mad honey poisoning related asystole has not been previously reported, and the rapid response to atropine is significant. (+info)Cardiac problems in mad-honey intoxication. (7/39)
Mad-honey disease or honey intoxication is caused by consuming honey produced from leaves and flowers of the Rhododendron family. Here a case of honey intoxication with cardiac involvement is reported. (+info)Grayanotoxin poisoning from Rhododendron simsii in an infant. (8/39)
We report a case of severe poisoning in a 57-day-old infant who presented with vomiting, convulsions, and shock after ingesting a bottle of milk containing a decoction of Rhododendron simsii. The grandmother collected this toxic plant from a cultivated area, believing it was good for the airways. Grayanotoxin was detected in both the urine and plant specimens. The infant made a good recovery after requiring ventilatory support for 2 days. Rhododendron is a common gardening shrub in Hong Kong. Some Rhododendron species are poisonous and contain grayanotoxin. Intentional or accidental ingestion of toxic plants can be severe or even life-threatening. It is therefore essential that clinicians be familiar with local toxic plant species. (+info)I'm sorry for any confusion, but "Rhododendron" is not a medical term. It is a genus of woody plants in the heath family Ericaceae, which includes shrubs and small trees commonly known as rhododendrons and azaleas. Some species contain toxic compounds that can cause health issues if ingested, but "Rhododendron" itself is not a medical term or concept.
I'm sorry for any confusion, but "Meteorology" is not a medical term. It is a branch of the atmospheric sciences which includes atmospheric chemistry and atmospheric physics with a major focus on weather forecasting. Meteorological phenomena are of interest to the field of aviation medicine, but meteorology itself is not a medical discipline.
I apologize for any confusion, but "Lauraceae" is not a medical term. It is a taxonomic category in botany, referring to the Laurel family of plants, which includes several genera and species of trees and shrubs. Some well-known members of this family include laurels, cinnamon, bay leaves, and avocados.
If you have any questions related to medical terminology or health sciences, I would be happy to help. Please provide me with the necessary details so I can offer an accurate response.
I'm sorry for any confusion, but "Snow" is not a medical term. It is a natural phenomenon and a common type of precipitation that occurs when water vapor in the atmosphere freezes into ice crystals. If you have any medical concerns or questions, I would be happy to try to help answer those!
Small Heat Shock Proteins (sHSPs) are a group of conserved molecular chaperones that play a crucial role in protecting cells from various stress conditions. They are named "heat shock proteins" because their expression is induced by heat shock and other stressful conditions, such as exposure to toxins, radiation, or infection.
Small Heat Shock Proteins are characterized by their low molecular weight, typically ranging between 12-43 kDa, and their ability to form large oligomeric complexes. These proteins function to prevent protein aggregation under stress conditions by binding to exposed hydrophobic regions of partially folded or denatured proteins, thereby preventing irreversible aggregation and promoting protein refolding.
sHSPs have been implicated in various cellular processes, including protein folding, protein degradation, signal transduction, and apoptosis. They are expressed in a wide range of tissues and organisms, from bacteria to humans, highlighting their essential role in maintaining cellular homeostasis. Mutations in sHSP genes have been associated with various human diseases, including neurodegenerative disorders, cataracts, and heart disease.
Ericaceae is a family of flowering plants, also known as heath family or heather family. It includes a number of genera with over 4000 species, many of which are evergreen shrubs and trees. Some well-known members of this family include blueberries, cranberries, rhododendrons, azaleas, and heathers. These plants typically prefer acidic soils and are often found in woodland, mountain, and coastal habitats.
I'm sorry for any confusion, but "honey" is not typically considered a medical term. It is a natural sweet substance produced by honeybees from the nectar of flowers. Honey is composed primarily of fructose and glucose, with small amounts of other sugars, water, proteins, amino acids, vitamins, minerals, enzymes, and various organic compounds.
While honey does have some potential health benefits, such as its antimicrobial properties and its use in wound healing, it is not a medical treatment or intervention. If you have any questions about the medicinal uses of honey or its role in health, I would recommend consulting with a healthcare professional.
Rhododendron
Rhododendron goodenoughii
Rhododendron moulmainense
Rhododendron keiskei
Rhododendron ovatum
Rhododendron hancockii
Rhododendron molle
Rhododendron campylogynum
Rhododendron maoerense
Rhododendron impeditum
Rhododendron longipes
Rhododendron wallichii
Rhododendron lowii
Rhododendron yedoense
Rhododendron cuneatum
Rhododendron farrerae
Rhododendron groenlandicum
Rhododendron wiltonii
Rhododendron columbianum
Rhododendron rubiginosum
Rhododendron pachysanthum
Rhododendron occidentale
Rhododendron, Oregon
Rhododendron williamsianum
Rhododendron adenosum
Rhododendron mucronulatum
Rhododendron adamsii
Rhododendron xanthocodon
Rhododendron fallacinum
Rhododendron buxifolium
Rhododendron - Wikipedia
Rhododendron goodenoughii - Wikipedia
Category:Rhododendron degronianum - Wikimedia Commons
Rhododendron occidentale
Yellowstone Rhododendron | Smithsonian American Art Museum
Rhododendron - Wikipedia
Rhododendron plant registration and naming / RHS Gardening
Rhododendron - Keele University
Rhododendron calophytum
Rhododendron trichostomum
Rhododendron indicum Rhododendron PFAF Plant Database
Rhododendron indicum - Wikispecies
Rhododendron - ABC Homeopathy
'Rhododendron flower' Photographic Print - Jamie & Judy Wild | AllPosters...
Rhododendron,flowers Stock Photo - Royalty Free Image ID 100545537
Rhododendron ecology mystery solved in Hengduan Mountains
Rhododendron PERFECTO MUNDO® Orange Azalea | Park Seed
'Rhododendron flower' Photographic Print - Jamie & Judy Wild | AllPosters...
More Rhododendron Beauty - Blue Ridge Country
Hybrid Rhododendron Plant Description
Rhododendron in Chinese Plant Names @ efloras.org
Rhododendron 'Hampshire Belle' | BBC Gardeners World Magazine
Rhododendron 'Palestrina'
Rhododendron arboreum
American Rhododendron Society Chapter Information
Rhododendron 'BEST DANE' - Havlis.cz
Rhododendron 'DELTA' - Havlis.cz
Lola's Rhododendron - Nature's Gift
American Rhododendron Society Blog
Ericaceae3
- Rhododendron is the largest genus in the family Ericaceae, with over 1000 species, (though estimates vary from 850 to 1200) and is morphologically diverse. (wikipedia.org)
- Rhododendron (family Ericaceae ) A genus of shrubs or trees that have big, scaly buds, simple , alternate, mostly evergreen leaves, and flowers borne in short racemes or umbel -like clusters, with 5-lobed, funnel-shaped to bell-shaped, slightly irregular corollas , and 5 or 10 stamens . (encyclopedia.com)
- This name is the accepted name of a species in the genus Rhododendron (family Ericaceae ). (theplantlist.org)
Azalea6
- Linnaeus' six species of Azalea were Azalea indica, A. pontica, A. lutea, A. viscosa, A. lapponica and A. procumbens (now Kalmia procumbens), which he distinguished from Rhododendron by having five stamens, as opposed to ten. (wikipedia.org)
- Meanwhile, other botanists such as Salisbury (1796) and Tate (1831) began to question the distinction between Azalea and Rhododendron, and finally in 1836, Azalea was incorporated into Rhododendron and the genus divided into eight sections. (wikipedia.org)
- A reblooming azalea, Rhododendron PERFECTO MUNDO® Orange Azalea sets large clusters of brilliant dark orange to red flowers, not for mere weeks, but for months. (parkseed.com)
- The common name for the deciduous Rhododendron species is azalea. (birminghambotanicalgardens.org.uk)
- Important Info : This Japanese azalea is a hybridization between Rhododendron indicum and Rhododendron simsii. (backyardgardener.com)
- Isolated from Flower of Royal Azalea, Rhododendron schlippenbachii. (bvsalud.org)
American Rhododendron Society1
- The Plant List Encyclopedia of Life Hirsutum.com Vireya.net National Center for Biotechnology Information, U.S. National Library of Medicine Stanton Eversole, "Rhododendron goodenoughii", Journal American Rhododendron Society, Volume 39, Number 4, Fall 1985. (wikipedia.org)
Species of rhododendrons2
- The pollen of many if not all species of rhododendrons is also probably toxic, being said to cause intoxication when eaten in large quantities[183]. (pfaf.org)
- Since there are so many closely-related species of rhododendrons, all living together in these mountains, we wanted to figure out how they were able to co-exist," says Ree. (cosmosmagazine.com)
Indicum4
- 2020. Rhododendron indicum in Kew Science Plants of the World Online . (wikimedia.org)
- Rhododendron indicum in the Germplasm Resources Information Network (GRIN) , U.S. Department of Agriculture Agricultural Research Service. (wikimedia.org)
- Rhododendron indicum - (L.)Sweet. (pfaf.org)
- Rhododendron indicum is an evergreen Shrub growing to 2 m (6ft 7in). (pfaf.org)
Ferrugineum1
- He listed five species under Rhododendron (Rhododendron ferrugineum (type species), R. dauricum, R. hirsutum, R. chamaecistus (now Rhodothamnus chamaecistus (L.) Rchb. (wikipedia.org)
Genus of shrubs and small2
- Rhododendron is a genus of shrubs and small to (rarely) large trees, the smallest species growing to 10-100 cm (4-40 in) tall, and the largest, R. protistum var. (wikipedia.org)
- rhododendron Large genus of shrubs and small trees that grow in the acid soils of cool temperate regions in North America , Europe , and Asia . (encyclopedia.com)
Azaleas1
- Azaleas make up two subgenera of Rhododendron. (wikipedia.org)
Ponticum1
- So serious is the threat from this organism that Rhododendron ponticum has to be cleared from areas where the disease is found. (keele.ac.uk)
Shrubs2
- Rhododendrons are low-maintenance shrubs that will perform superbly provided you plant them well. (havlis.cz)
- My rhododendrons, on the other hand, are silent shrubs. (mooseyscountrygarden.com)
Stamens1
- Rhododendron are characterised by having inflorescences with scarious (dry) perulae, a chromosome number of x=13, fruit that has a septicidal capsule, an ovary that is superior (or nearly so), stamens that have no appendages, and agglutinate (clumped) pollen. (wikipedia.org)
Degronianum1
- For instance Rhodora (Linnaeus 1763) for Rhododendron canadense, Vireya (Blume 1826) and Hymenanthes (Blume 1826) for Rhododendron metternichii, now R. degronianum. (wikipedia.org)
Subgenus1
- These scales, unique to subgenus Rhododendron, are modified hairs consisting of a polygonal scale attached by a stalk. (wikipedia.org)
Poisonous1
- If it is incorporated in quantity by bees, Rhododendron nectar may render honey poisonous. (encyclopedia.com)
Vireya1
- The Rhododendron group includes both showy temperate species and the Vireya group of delicate, tropical species, some of which have scented flowers. (encyclopedia.com)
Plants2
- Rhododendrons make up an incredibly diverse group of plants, originating from many parts of the Northern hemisphere with a large concentration in China and the Himalayas. (gardenersworld.com)
- Mad honey is honey contaminated with grayanotoxin, a chemical produced by Rhododendron plants. (cdc.gov)
Different species2
- There are over 30 different species in the Rhododendron genus within in the same area of the Hengduan mountains. (cosmosmagazine.com)
- In the Rhododendron valley you will find around 70 different species and several varieties. (bergianska.se)
Flower3
- They are distinguished from "true" rhododendrons by having only five anthers per flower. (wikipedia.org)
- The rhododendron species all flower at different points in the year, meaning they don't compete with each other for pollinators. (cosmosmagazine.com)
- And let's be fair - the first rhododendrons to flower have already been gushed over, photographed at bud-burst, and Non-Gardening Partner has been dragged off into the greenery to admire them. (mooseyscountrygarden.com)
Native1
- Rhododendron goodenoughii is a rhododendron species native to Papua New Guinea, particularly Goodenough Island where it grows at altitudes of 800-1,500 m (2,600-4,900 ft). (wikipedia.org)
Grow1
- For best results, grow Rhododendron 'Hampshire Belle' in dappled to partial shade in moist but well-drained, acidic soil. (gardenersworld.com)
Description1
- Although Rhododendrons had been known since the description of Rhododendron hirsutum by Charles de l'Écluse (Clusius) in the sixteenth century, and were known to classical writers (Magor 1990), and referred to as Chamaerhododendron (low-growing rose tree), the genus was first formally described by Linnaeus in his Species Plantarum in 1753. (wikipedia.org)
Bloom1
- When the Baudsons suggested a walk to go and see rhododendrons in bloom, I never suspected that we would be witnessing this beautiful spectacles from inside the rhododendrons. (blipfoto.com)
Mountains2
- Rhododendron meadows in China's Hengduan mountains. (cosmosmagazine.com)
- High up in the Hengduan Mountains, east of the Himalaya in southern China, dozens of different rhododendron species live together in meadows. (cosmosmagazine.com)
Flowers3
- The researchers logged a variety of ecological features for 34 different rhododendron species - including size and shape of leaves and flowers, when they bloomed, and where they grew. (cosmosmagazine.com)
- Rhododendron 'Hampshire Belle' is a dramatic variety with trusses of fuchsia-pink flowers that appear in May. (gardenersworld.com)
- They represent a number of sections in the genus Rhododendron, whose distinguishing feature is loss of leaves in the autumn, usually accompanied by good autumn colour and spectacular displays of flowers on bare stems or alongside newly emerging leaves in the spring. (birminghambotanicalgardens.org.uk)
List1
- Ide ln sm s ke ko en m je ra elina sm chan s lehkou, v pno-prostou zahradn zem , zasypan tlej c m list m i drcenou k rou. (havlis.cz)
Type1
- As new species of what are now considered Rhododendron were discovered, they were assigned to separate genera if they seemed to differ significantly from the type species. (wikipedia.org)
Store1
- De store duftende blomster vises i slutningen af for ret og er ret spektakul re, der str kker sig i farve fra hvid til lyser de eller pink, undertiden med en gul blotch. (rhododendron.dk)
Media1
- Wikimedia Commons has media related to Rhododendron goodenoughii. (wikipedia.org)