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Chemical characterization of bioactive compounds from the endophytic fungus Diaporthe helianthi isolated from Luehea divaricata

机译:分离自Luehea divaricata的内生真菌Diaporthe helianthi的生物活性化合物的化学表征

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摘要

Endophytic microorganisms, defined as fungi or bacteria that colonize the interior of plants without causing any immediate negative effects or damages, have reciprocal relationships with host plants. In some cases their presence is beneficial to the host due to the synthesis of bioactive compounds, among which several alcohols, esters, ketones and others that may react with other compounds and may be lethal to pathogenic microorganisms. Diaporthe helianthi (Phomopsis helianthi in its anamorphic phase) is available worldwide, especially in Europe, Asia and America. Isolated in Europe as an agent of the sunflower stem cancer, it has also been endophytically isolated from tropical and temperate plants. A D. helianthi strain isolated from Luehea divaricata has been employed in current research. An investigation of the secondary metabolite from D. helianthi by CC and NMR of 1H and 13C yielded the separation of 10 fractions and the identification of the phenolic compound 2(-4 hydroxyphenyl)-ethanol (Tyrosol). Its antimicrobial reaction was tested and the ensuing antagonistic effects on the human pathogenic bacteria Enterococcus hirae, Escherichia coli, Micrococcus luteus, Salmonella typhi, Staphylococcus aureus, phytopathogenic Xanthomonas asc. phaseoli and phytopathogenic fungi were demonstrated. Results show that bioactive compounds and Tyrosol produced by D. helianthi have a biotechnological potential.
机译:内生微生物被定义为真菌或细菌,它们定植在植物内部而不会引起任何直接的负面影响或损害,它们与宿主植物具有相互关系。在某些情况下,由于生物活性化合物的合成,它们的存在对宿主是有益的,其中几种醇,酯,酮和其他可能与其他化合物反应并可能致病性微生物致死的醇。 Diaporthe helianthi(变态的Phomopsis helianthi)在世界各地都有销售,尤其是在欧洲,亚洲和美洲。在欧洲作为向日葵干癌的病原体分离出来的,也已从热带和温带植物内生地分离出来。分离自Luehea divaricata的D. helianthi菌株已用于当前研究中。用 1 H和 13 C的CC和NMR研究了D. helianthi的次生代谢产物,分离出10个馏分,并鉴定了酚类化合物2(- 4-羟基苯基)-乙醇(Tyrosol)。测试了它的抗微生物反应,以及对人病原菌肠球菌,大肠埃希氏菌,黄斑微球菌,伤寒沙门氏菌,金黄色葡萄球菌,致病性黄单胞菌asc的拮抗作用。证明了菜豆和致病真菌。结果表明,D。helianthi生产的生物活性化合物和酪醇具有生物技术潜力。

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