The present study was designed to determine the major chemical constituents of the leaves of Rhododendron dauricum L. Compounds were isolated and purified by various chromatographic methods, and their structures were ...The present study was designed to determine the major chemical constituents of the leaves of Rhododendron dauricum L. Compounds were isolated and purified by various chromatographic methods, and their structures were elucidated by physicochemical properties and spectral data. The present study identified two new C-methyl flavanones, 5, 7, 3', 5'-tetrahydroxy-6, 8-di-C-methyl flavanone(1) and 5, 4'-dihydroxy-8-C-methylflavanone-7-O-β-D-glucopyranoside(2), and one new flavonoid glycoside, quercetin-3-O-β-D-(6''-O-cinnamoyl)-galactoside(3), along with seven known compounds, including syzalterin(4), poriolin(5), farrerol-7-O-β-D-glucopyranoside(6), myrciacetin(7), quercetin-3-O-β-D-(6-p-hydroxy-benzoyl)-galactoside(8), quercetin-3-O-β-D-(6-p-coumaroyl)-galactoside(9), and 5, 7, 3', 5'-tetrahydroxyl flavanone(10). Compounds 1-3 were determined to be new flavonoids; compounds 4-6 were isolated from this species for the first time; and compounds 7-10 were reported for the first time from this genus.展开更多
为了了解大兴安岭北部地区兴安杜鹃(Rhododendron dauricum L.)的菌根真菌多样性特征。采用形态学和r DNA ITS序列分析相结合的方法。结果表明从兴安杜鹃根样中分离得到的真菌分属于7个属:Phialocephala、粒毛盘菌属(Lachnum)、膜盘菌属...为了了解大兴安岭北部地区兴安杜鹃(Rhododendron dauricum L.)的菌根真菌多样性特征。采用形态学和r DNA ITS序列分析相结合的方法。结果表明从兴安杜鹃根样中分离得到的真菌分属于7个属:Phialocephala、粒毛盘菌属(Lachnum)、膜盘菌属(Hymenoscyphus)、Meliniomyces、丝核菌属(Rhizoctonia)、被孢霉属(Mortierella)和软盘菌属(Mollisia)。其中Phialocephala、粒毛盘菌属(Lachnum)和膜盘菌属(Hymenoscyphus)为兴安杜鹃菌根真菌优势类群,在分离的菌株中所占比率超过了20%。研究表明与兴安杜鹃根共生的真菌类群较丰富。展开更多
基金supported by the National Natural Science Foundation of China(No.81373956)
文摘The present study was designed to determine the major chemical constituents of the leaves of Rhododendron dauricum L. Compounds were isolated and purified by various chromatographic methods, and their structures were elucidated by physicochemical properties and spectral data. The present study identified two new C-methyl flavanones, 5, 7, 3', 5'-tetrahydroxy-6, 8-di-C-methyl flavanone(1) and 5, 4'-dihydroxy-8-C-methylflavanone-7-O-β-D-glucopyranoside(2), and one new flavonoid glycoside, quercetin-3-O-β-D-(6''-O-cinnamoyl)-galactoside(3), along with seven known compounds, including syzalterin(4), poriolin(5), farrerol-7-O-β-D-glucopyranoside(6), myrciacetin(7), quercetin-3-O-β-D-(6-p-hydroxy-benzoyl)-galactoside(8), quercetin-3-O-β-D-(6-p-coumaroyl)-galactoside(9), and 5, 7, 3', 5'-tetrahydroxyl flavanone(10). Compounds 1-3 were determined to be new flavonoids; compounds 4-6 were isolated from this species for the first time; and compounds 7-10 were reported for the first time from this genus.
文摘为了了解大兴安岭北部地区兴安杜鹃(Rhododendron dauricum L.)的菌根真菌多样性特征。采用形态学和r DNA ITS序列分析相结合的方法。结果表明从兴安杜鹃根样中分离得到的真菌分属于7个属:Phialocephala、粒毛盘菌属(Lachnum)、膜盘菌属(Hymenoscyphus)、Meliniomyces、丝核菌属(Rhizoctonia)、被孢霉属(Mortierella)和软盘菌属(Mollisia)。其中Phialocephala、粒毛盘菌属(Lachnum)和膜盘菌属(Hymenoscyphus)为兴安杜鹃菌根真菌优势类群,在分离的菌株中所占比率超过了20%。研究表明与兴安杜鹃根共生的真菌类群较丰富。
