|
Phenanthrenoids
Phenanthrenoids are chemical compounds formed with a phenanthrene backbone. These compounds occur naturally in plants, although they can also be synthesized. Phenanthrols Phenanthrols are any of five isomeric phenols derived from phenanthrene ( 1-phenanthrol, 2-phenanthrol, 3-phenanthrol, 4-phenanthrol, 9-phenanthrol). These molecules can be biomarkers of smoking and/or PAH worker exposure. Chemistry Under UV irradiation, stilbene and its derivatives undergo intramolecular cyclization to form dihydrophenanthrenes. Natural occurrences Phenanthrenes have been reported from flowering plants, mainly in the family Orchidaceae, and a few in the families Dioscoreaceae, Combretaceae and Betulaceae, as well as in the lower plant class Marchantiophyta (liverworts). The rhizome of ''Dioscorea communis'' contains phenanthrenes ( 7-hydroxy-2,3,4,8-tetramethoxyphenanthrene, 2,3,4-trimethoxy-7,8-methylenedioxyphenanthrene, 3-hydroxy-2,4,-dimethoxy-7,8-methylenedioxyphenanthrene, 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnopusin
Gymnopusin is a phenanthrenediol produced by the orchid ''Bulbophyllum gymnopus''. It is also found in ''Bulbophyllum reptans'' and ''Maxillaria densa ''Maxillaria densa'', the crowded maxillaria, is a species of orchid ranging from Mexico south to Nicaragua. Gymnopusin Gymnopusin is a phenanthrenediol produced by the orchid '' Bulbophyllum gymnopus''. It is also found in '' Bulbophyllum rep ...''.Phytotoxicity and ultrastructural effects of gymnopusin from the orchid Maxillaria densa on duckweed (Lemna pausicostata) frond and root tissues. Valencia-Islas NA, Paul RN, Shier WT, Mata R and Abbas HK, Phytochemistry, 2002, volume 61, issue 2, pages 141-148, , References External links Gymnopusin at kanaya.naist.jp/knapsack_jsp Phenanthrenoids Orchids {{aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1-phenanthrol
1-Hydroxyphenanthrene is a phenanthrol and a human metabolite of phenanthrene that can be detected in urine of persons exposed to PAHs. It can also be used as a marker for PAH pollution measured in marine fish bile. The model fungus ''Cunninghamella elegans'' produces, in the case of the biodegradation of phenanthrene, a glucoside A glucoside is a glycoside that is derived from glucose. Glucosides are common in plants, but rare in animals. Glucose is produced when a glucoside is hydrolysed by purely chemical means, or decomposed by fermentation or enzymes. The name was o ... conjugate of 1-hydroxyphenanthrene ( phenanthrene 1-O-beta-glucose). Relationship with smoking Highly significant differences and dose-response relationships with regard to cigarettes smoked per day were found for 2-, 3- and 4-hydroxyphenanthrene and 1-hydroxypyrene, but not for 1-hydroxyphenanthrene.Urinary monohydroxylated phenanthrenes and hydroxypyrene – the effects of smoking habits and ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Juncus Acutus
''Juncus acutus'', the spiny rush, sharp rush or sharp-pointed rush, is a flowering plant in the monocot family Juncaceae found throughout the Americas, Northern and Southern Africa, Western and Southern Europe and West Asia. It grows in salt marshes and on dunes and is reliable for reducing erosion rates. In some countries like Australia it is considered to be an invasive weed and the spines harmful to young children. Synonyms *''Juncus acutus'' ssp. ''leopoldii'' (Parl.) Snog. -- Leopold's rush *''Juncus acutus'' L. var. ''sphaerocarpus'' Engelm *''Juncus acutus'' L. subsp. ''acutus'' *''Juncus spinosus'' Forssk *''Juncus acutus'' ssp. ''leopoldii'' also known as ''Leopold's rush'' is a native of Arizona, California, Georgia and Nevada. *''Juncus acutus'' L. var. ''conglobatus'' Trautv *''Juncus acutus'' L. var. ''decompositus'' Guss *''Juncus acutus'' L. var. ''longibracteatus'' Buchenau Description ''Juncus acutus'' is a brown and green " tussocky" perennial that can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cymbidium
''Cymbidium'' , commonly known as boat orchids, is a genus of evergreen flowering plants in the orchid family Orchidaceae. Orchids in this genus are epiphytic, lithophytic, terrestrial or rarely leafless saprophytic herbs usually with pseudobulbs. There are usually between three and twelve leaves arranged in two ranks on each pseudobulb or shoot and lasting for several years. From one to a large number of flowers are arranged on an unbranched flowering stem arising from the base of the pseudobulb. The sepals and petals are all free from and similar to each other. The labellum is significantly different from the other petals and the sepals and has three lobes. There are about fifty-five species and sixteen further natural hybrids occurring in the wild from tropical and subtropical Asia to Australia. Cymbidiums are well known in horticulture and many cultivars have been developed. Description Plants in the genus ''Cymbidium'' are epiphytic, lithophytic or terrestrial plants, or ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coelogyne
''Coelogyne'' is a genus of over 200 sympodial epiphytes from the family Orchidaceae, distributed across India, China, Indonesia and the Fiji islands, with the main centers in Borneo, Sumatra and the Himalayas. They can be found from tropical lowland forests to montane rainforests. A few species grow as terrestrials or even as lithophytes in open, humid habitats. The genera ''Bolborchis'' Lindl., ''Hologyne'' Pfitzer and ''Ptychogyne'' Pfitzer are generally included here. The genus is abbreviated ''Coel.'' in trade journals. Name The name ''Coelogyne'' was first published as ''Caelogyne'' in 1821 by John Lindley.Lindley, J. 1821. Collectanea Botanica, ad pl. 33 and pl. 37 and is derived from the Ancient Greek words '' κοῖλος'' (''koîlos'', hollow) and '' γῠνή'' (''gunḗ'', woman), referring to the concave stigma. A few species are commonly known as "necklace orchids", because of their long, pendant, multi-flowered inflorescence. Description This genus lac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bletilla
''Bletilla'', common name urn orchid, is a temperate, terrestrial plant, terrestrial genus of orchids containing five currently recognized species distributed through China, Japan, Taiwan, south to Vietnam, Thailand and Myanmar. The name is actually a diminutive of ''Bletia'' because of the resemblance between the two genera even though Bletia is a New World genus. The genera ''Jimensia'' Constantine Samuel Rafinesque-Schmaltz, Raf. and ''Polytoma'' Lour. ex are generally included into ''Bletilla''. This genus is abbreviated Ble in trade journals. The pseudobulbs resemble spreading corms which usually sit at ground level. Each pseudobulb generally bears several pleated leaves around 40 cm long. The racemes of flowers emerge from the center of the years new growth before it is mature, during spring and early summer. The flowers vary in color from white to purple, and all species have four pollinia. The tubers resemble a horn or claw. They are grayish-white or yellowish-white ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maxillaria
''Maxillaria'', abbreviated as Max in the horticultural trade, is a large genus of orchids (family Orchidaceae). This is a diverse genus, with very different morphological forms. Their characteristics can vary widely. They are commonly called spider orchids, flame orchids or tiger orchids. Their scientific name is derived from the Latin word ''maxilla'', meaning jawbone, reflecting on the column and the base of the lip of some species, that may evoke a protruding jaw. Recent molecular studies have found ''Maxillaria'' as it has long been viewed to be an unnatural hodgepodge composed of groups not closely related to each other. Hence it has been proposed that the genus should be split into several genera, proposals that have been gaining acceptance. Some of the species long considered members of ''Maxillaria'' have been moved to other genera: ''Camaridium, Heterotaxis, Ornithidium, Brasiliorchis, Christensonella, Nitidibulbon, Sauvetrea, Inti, Mapinguari, Maxillariella, Rhetinan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eria
''Eria'' is a genus of orchids with more than 50 species distributed in China, the Himalayas, the Indian Subcontinent, Southeast Asia, New Guinea, Polynesia, Melanesia and Micronesia. Species ''Eria'' species accepted by the Plants of the World Online as of February 2021: *''Eria albescens'' *''Eria aurantiaca'' *''Eria bancana'' *''Eria berringtoniana'' *'' Eria bifalcis'' *'' Eria bigibba'' *''Eria binabayensis'' *''Eria carolettae'' *''Eria chlorantha'' *''Eria clausa'' *''Eria compressoclavata'' *''Eria convallariopsis'' *''Eria coronaria'' *''Eria curtisii'' *''Eria dayana'' *''Eria decipiens'' *'' Eria floribunda'' *'' Eria gagnepainii'' *'' Eria geboana'' *'' Eria genuflexa'' *'' Eria halconensis'' *'' Eria imbricata'' *'' Eria imitans'' *'' Eria imperatifolia'' *''Eria javanica'' *'' Eria kaniensis'' *''Eria lactiflora'' *''Eria micholitziana'' *'' Eria nepalensis'' *'' Eria oblonga'' *'' Eria odorifera'' *'' Eria pachycephala'' *'' Eria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulbophyllum
''Bulbophyllum'' is a genus of mostly epiphytic and lithophytic orchids in the family Orchidaceae. It is the largest genus in the orchid family and one of the largest genera of flowering plants with more than 2,000 species, exceeded in number only by ''Astragalus''. These orchids are found in diverse habitats throughout most of the warmer parts of the world including Africa, southern Asia, Latin America, the West Indies, and various islands in the Indian and Pacific Oceans. Orchids in this genus have thread-like or fibrous roots that creep over the surface of trees or rocks or hang from branches. The stem is divided into a rhizome and a pseudobulb, a feature that distinguished this genus from ''Dendrobium''. There is usually only a single leaf at the top of the pseudobulb and from one to many flowers are arranged along an unbranched flowering stem that arises from the base of the pseudobulb. Several attempts have been made to separate ''Bulbophyllum'' into smaller genera, but most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrobium
''Dendrobium'' is a genus of mostly epiphytic and lithophytic orchids in the family Orchidaceae. It is a very large genus, containing more than 1,800 species that are found in diverse habitats throughout much of south, east and southeast Asia, including China, Japan, India, the Philippines, Indonesia, Australia, New Guinea, Vietnam and many of the islands of the Pacific. Orchids in this genus have roots that creep over the surface of trees or rocks, rarely having their roots in soil. Up to six leaves develop in a tuft at the tip of a shoot and from one to a large number of flowers are arranged along an unbranched flowering stem. Several attempts have been made to separate ''Dendrobium'' into smaller genera, but most have not been accepted by the World Checklist of Selected Plant Families. Description ''Dendrobium'' species are mostly epiphytic, or lithophytic although a few species are terrestrial. They are sympodial herbs with cylindrical roots usually arising from the base of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alseodaphne Perakensis
''Alseodaphne'' is a genus of plants in the family Lauraceae, endemic to China and Southeast Asia. The genus has 96 species of evergreen trees to shrubs. They have bisexual flowers, a fruit stalk that is red, green, or yellow, and black fruit.''Alseodaphne''. Flora of China. Species include: * ''Alseodaphne albifrons'' * ''Alseodaphne andersonii'' * ''Alseodaphne bancana'' * ''Alseodaphne birmanica'' * ''Alseodaphne borneensis'' * ''Alseodaphne cavaleriei'' * '' Alseodaphne dura'' * ''Alseodaphne elmeri'' * ''Alseodaphne elongata'' * '' Alseodaphne foxiana'' * '' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Dendrobium")