【摘要】 在筛选具有除草活性资源时,得到1株具有显著除草活性的碳角菌属真菌Xylaria sp. NH1801,对其进行活性成分跟踪分离,得到1个细胞松弛素及其水解产物,鉴定其结构为19,20-环氧-细胞松弛素Q(1)和21-去乙酰化-19,20-环氧-细胞松弛素Q(2)。化合物1和化合物2在50μg/mL时可以显著抑制稗草[Echinochloa crusgalli(L.)Beauv](抑制率分别为65.7%和60.7%)和反枝苋(Amaranthus retroflexus L.)种子萌发(抑制率分别为77.2%和75.4%),这是首次报道化合物1和化合物2对稗草和反枝苋种子具有抑制作用。更多还原

【Abstract】 In the screening of resources with herbicidal activity,a fungus Xylaria sp.NH1801 with significant herbicidal activity was obtained. The active compound of Xylaria sp. NH 1801 were traced and isolated and two compounds were identified as 19,20-epoxycytochalasin Q(1)and 21-deacetylated-19,20-epoxy-cytochalasin Q(2). At 50 μg/mL,compounds 1 and 2 significantly inhibition toward the root elongation of Echinochloa crusgalli(inhibition rates were 65.7% and 60.7%,respectively)and Amaranthus retroflexus seeds(inhibition rates were 77.2% and 75.4%,respectively). This is the first report on the inhibitory effect of compounds 1 and 2 on Echinochloa crusgalli and Amaranthus retroflexus seeds.更多还原