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Myrcia Guianensis
''Myrcia guianensis'' (pedra-ume-caá) is a species of plant in the genus ''Myrcia'' of the family Myrtaceae native to South America. This species shows allelopathic effects on germination and radicle and hypocotyl growth of weeds. Isolated compounds related to this inhibition are gallic and protocatechuic acids.Allelopathic potential of Myrcia guianensis. Souza Filho A.P.S., Santos R.A., Santos L.S., Guilhon G.M.P., Santos A.S., Arruda M.S.P., Muller A.H. and Arruda A.C., Planta daninha, vol. 24, no. 4, Oct./Dec. 2006, This species is found in association with endophytic fungi An endophyte is an endosymbiont, often a bacterium or fungus, that lives within a plant for at least part of its life cycle without causing apparent disease. Endophytes are ubiquitous and have been found in all species of plants studied to date; ....Endophytic fungi from Myrcia guianensis at the Brazilian Amazon: distribution and bioactivity. Elissandro Fonseca dos Banhos, Antonia Queiroz Lima de Sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrcia
''Myrcia'' is a genus of plants in the family Myrtaceae, containing about 765 species as of 2022. They are distributed in Central and South America, Mexico, and the Caribbean, with centers of diversity in the Brazilian Cerrado and Atlantic Forests ecoregions. ''Myrcia'' was first described as a genus in 1827.Candolle, Augustin Pyramus de. 1827. Dictionnaire classique d'histoire naturelle 11: 406 Selected species Formerly placed here * ''Plinia cauliflora'' (Mart.) Kausel (as ''M. jaboticaba'' Baill.) References External links Myrcia, Myrtaceae genera Taxa named by Augustin Pyramus de Candolle Neotropical realm flora {{Myrtaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrtaceae
Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All species are woody, contain essential oils, and have flower parts in multiples of four or five. The leaves are evergreen, alternate to mostly opposite, simple, and usually entire (i.e., without a toothed margin). The flowers have a base number of five petals, though in several genera, the petals are minute or absent. The stamens are usually very conspicuous, brightly coloured, and numerous. Evolutionary history Scientists hypothesize that the family Myrtaceae arose between 60 and 56 million years ago (Mya) during the Paleocene era. Pollen fossils have been sourced to the ancient supercontinent Gondwana. The breakup of Gondwana during the Cretaceous period (145 to 66 Mya) geographically isolated disjunct taxa and allowed for rapid speciation; i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallic Acid
Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6 H2( OH)3CO2H. It is classified as a phenolic acid. It is found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants. It is a white solid, although samples are typically brown owing to partial oxidation. Salts and esters of gallic acid are termed "gallates". Isolation and derivatives Gallic acid is easily freed from gallotannins by acidic or alkaline hydrolysis. When heated with concentrated sulfuric acid, gallic acid converts to rufigallol. Hydrolyzable tannins break down on hydrolysis to give gallic acid and glucose or ellagic acid and glucose, known as gallotannins and ellagitannins, respectively. Biosynthesis Gallic acid is formed from 3-dehydroshikimate by the action of the enzyme shikimate dehydrogenase to produce 3,5-didehydroshikimate. This latter compound aromatizes. Reactions Oxidation and oxidative coupling Alkaline solutions of gallic a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protocatechuic Acid
Protocatechuic acid (PCA) is a dihydroxybenzoic acid, a type of phenolic acid. It is a major metabolite of antioxidant polyphenols found in green tea. It has mixed effects on normal and cancer cells in ''in vitro'' and ''in vivo'' studies. Biological effects Protocatechuic acid (PCA) is antioxidant and anti-inflammatory. PCA extracted from ''Hibiscus sabdariffa'' protected against chemically induced liver toxicity ''in vivo''. ''In vitro'' testing documented antioxidant and anti-inflammatory activity of PCA, while liver protection ''in vivo'' was measured by chemical markers and histological assessment. PCA has been reported to induce apoptosis of human leukemia cells, as well as malignant HSG1 cells taken from human oral cavities, but PCA was found to have mixed effects on TPA-induced mouse skin tumours. Depending on the amount of PCA and the time before application, PCA could reduce or enhance tumour growth. Similarly, PCA was reported to increase proliferation and inhibit a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endophytic Fungi
An endophyte is an endosymbiont, often a bacterium or fungus, that lives within a plant for at least part of its life cycle without causing apparent disease. Endophytes are ubiquitous and have been found in all species of plants studied to date; however, most of the endophyte/plant relationships are not well understood. Some endophytes may enhance host growth, nutrient acquisition and improve the plant's ability to tolerate abiotic stresses, such as drought and decrease biotic stresses by enhancing plant resistance to insects, pathogens and herbivores. Although endophytic bacteria and fungi are frequently studied, endophytic archaea are increasingly being considered for their role in plant growth promotion as part of the core microbiome of a plant. History Endophytes were first described by the German botanist Johann Heinrich Friedrich Link in 1809. They were thought to be plant parasitic fungi and they were later termed as "microzymas" by the French scientist Béchamp. There wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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