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5-O-Methylquercetin
Azaleatin is a chemical compound. It is an O-methylated flavonol, a type of flavonoid. It was first isolated from the flowers of ''Rhododendron mucronatum'' in 1956 and has since been recorded in forty-four other Rhododendron species, in ''Plumbago capensis'', in ''Ceratostigma willmottiana'' and in ''Carya pecan''. It has been also been found in the leaves of ''Eucryphia''. Glycosides Azalein is the 3-''O''-α-L-rhamnoside Rhamnose (Rha, Rham) is a naturally occurring deoxy sugar. It can be classified as either a methyl-pentose or a 6-deoxy-hexose. Rhamnose predominantly occurs in nature in its L-form, L-form as L-rhamnose (6-deoxy-L-mannose). This is unusual, since ... of azaleatin. References O-methylated flavonols Catechols {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O-methylated Flavonol
The O-methylated flavonoids or methoxyflavonoids are flavonoids with methylations on hydroxyl groups (methoxy bonds). O-methylation has an effect on the solubility of flavonoids. Enzymes O-methylated flavonoids formation implies the presence of specific O-methyltransferase (OMT) enzymes which accept a variety of substrates. Those enzymes mediate the O-methylation on a specific hydroxyl group, like on 4' (example in ''Catharanthus roseus'') or 3' (example in rice) positions. Those positions can be ortho, meta, para and there can be a special 3-O-methyltransferase for the 3-OH position. Calamondin orange ('' Citrus mitis'') exhibits all of those activities. Plant enzymes * Apigenin 4'-O-methyltransferase * 8-hydroxyquercetin 8-O-methyltransferase * Isoflavone 4'-O-methyltransferase * Isoflavone 7-O-methyltransferase * Isoliquiritigenin 2'-O-methyltransferase * Isoorientin 3'-O-methyltransferase * Kaempferol 4'-O-methyltransferase * Luteolin O-methyltransferase * Methylquercet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhododendron Mucronatum
''Rhododendron mucronatum'' is a rhododendron species native to China, where it grows at altitudes of . This evergreen shrub grows to in height, with leaves that are lanceolate The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular ... to ovate-lanceolate or oblong-lanceolate, 2–6 by 0.5–1.8 cm in size. The flowers are white, pink, or pale red. References * "''Rhododendron mucronatum''", (Blume) G. Don, Gen. Hist. 3: 846. 1834. The Plant ListFlora of ChinaHirsutum.com mucronatum {{Ericaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plumbago Capensis
''Plumbago auriculata'', the cape leadwort, blue plumbago or Cape plumbago, is a species of flowering plant in the family Plumbaginaceae, native to South Africa."Botanica. The Illustrated AZ of over 10000 garden plants and how to cultivate them", p 691. Könemann, 2004. Nico Vermeulen:"The Complete Encyclopedia of Container Plants", p. 216. Rebo International, Netherlands, 1998. The specific epithet ''auriculata'' means "with ears", referring to the shape of the leaves. Description ''Plumbago auriculata'' is an evergreen shrub, often grown as a climber, ascending rapidly to tall by wide in nature, though much smaller when cultivated as a houseplant. The leaves are a glossy green and grow to long. The stems are long, thin, and climbing. The leaves alternate and are 2–5 cm. The five petals are about 2 cm wide and can be pale blue, blue or violet in color. There also variations with white (''P. auriculata'' var. ''alba'') or deep blue (''P. auriculata'' 'Royal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratostigma Willmottiana
''Ceratostigma'' (;), or leadwort, plumbago, is a genus of eight species of flowering plants in the family Plumbaginaceae, native to warm temperate to tropical regions of Africa and Asia. Common names are shared with the genus ''Plumbago''. Description ''Ceratostigma'' species are flowering herbaceous plants, subshrubs, or small shrubs growing to tall. The leaves are spirally arranged, simple, 1–9 cm long, usually with a hairy margin. Some of the species are evergreen, others deciduous. The flowers are produced in a compact inflorescence, each flower with a five-lobed corolla; flower colour varies from pale to dark blue to red-purple. The fruit is a small bristly capsule containing a single seed. Selected species *'' Ceratostigma abyssinicum'' (Hochst.) Schwein. & Asch. *'' Ceratostigma griffithii'' C.B.Clarke *'' Ceratostigma minus'' Stapf ex Prain *'' Ceratostigma plumbaginoides'' (Bunge) *'' Ceratostigma ulicinum'' Prain *''Ceratostigma willmottianum'' Stapf C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carya Pecan
The pecan (''Carya illinoinensis'') is a species of hickory native to the southern United States and northern Mexico in the region of the Mississippi River. The tree is cultivated for its seed in the southern United States, primarily in Georgia, New Mexico, Texas, and Mexico, which produces nearly half of the world total. The seed is an edible nut used as a snack and in various recipes, such as praline candy and pecan pie. The pecan is the state nut of Alabama, Arkansas, California, and Texas and is also the state tree of Texas. Name "Pecan" is from an Algonquin word, variously referring to pecans, walnuts, and hickory nuts. There are many pronunciations, some regional and others not.See "Pecan" at Wiktionary. The most common American pronunciation is . There is little agreement in the United States regarding the "correct" pronunciation, even regionally. Growth The pecan tree is a large deciduous tree, growing to in height, rarely to .Flora of North America''Carya illino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucryphia
''Eucryphia'' is a small genus of trees and large shrubs native to the south temperate regions of South America and coastal eastern Australia, mainly Tasmania. Sometimes placed in a family of their own, the Eucryphiaceae, more recent classifications place them in the Cunoniaceae. There are seven species, two in South America and five in Australia, and several named hybrids. Description They are mostly evergreen though one species (''E. glutinosa'') is usually deciduous. The leaves are opposite, and either simple or pinnate with 3-13 leaflets. The flowers are produced in late summer or autumn, are showy and sweetly scented, 3–6 cm diameter, with four creamy-white petals, and numerous stamens and styles. The fruit is a woody capsule 1-1.5 cm long containing several seeds, and maturing in 12–15 months. Etymology The generic name ''Eucryphia'' is composed of two parts, namely ''eu-'' and ''-cryphia''. The Greek ευ-κρυφαιος means well-covered and refers t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azalein
Azalein is a chemical compound. It is a flavonol, a type of flavonoid. It is the 3-O-α-L-rhamnoside of azaleatin. It can be found in the flowers of ''Plumbago ''Plumbago'' is a genus of 10–20 species of flowering plants in the family Plumbaginaceae, native to warm temperate to tropical regions of the world. Common names include plumbago and leadwort (names which are also shared by the genus ''Cerato ...'' and '' Rhododendron'' species. References O-methylated flavonols Flavonol rhamnosides {{Aromatic-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhamnoside
Rhamnose (Rha, Rham) is a naturally occurring deoxy sugar. It can be classified as either a methyl-pentose or a 6-deoxy-hexose. Rhamnose predominantly occurs in nature in its L-form as L-rhamnose (6-deoxy-L-mannose). This is unusual, since most of the naturally occurring sugars are in D-form. Exceptions are the methyl pentoses L-fucose and L-rhamnose and the pentose L-arabinose. However, examples of naturally-occurring D-rhamnose include some species of bacteria, such as ''Pseudomonas aeruginosa'' and ''Helicobacter pylori''. Rhamnose can be isolated from Buckthorn (''Rhamnus''), poison sumac, and plants in the genus ''Uncaria''. Rhamnose is also produced by microalgae belonging to class Bacillariophyceae (diatoms). Rhamnose is commonly bound to other sugars in nature. It is a common glycone component of glycosides from many plants. Rhamnose is also a component of the outer cell membrane of acid-fast bacteria in the ''Mycobacterium'' genus, which includes the organism that caus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
