Phytotoxicity of three lactones from Nigrospora sacchari
Phytotoxicity of three lactones from Nigrospora sacchari
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DOI：
10.1016/s0031-9422(97)01023-6
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发表时间：
1998-06-01
期刊：
影响因子：
3.8
通讯作者：
Fujimori, T
中科院分区：
文献类型：
--
作者：
Fukushima, T;Tanaka, M;Fujimori, T
糖黑孢培养液在处理完整的温室植物时表现出很强的除草活性。从培养液中分离出三种内酯。这。主要化合物在测定过程中表现出真菌代谢物最显着的作用，被鉴定为(+)-Phomalactone, 6-(1-丙烯基)-5,6-二氢-5-羟基-2H吡喃-2-酮。其他是 5-[1-(1-羟基丁-2-烯基)]-呋喃-2-酮和 5-[1-(1-羟基丁-2-烯基)1-二氢呋喃。在电解质渗漏测定中研究了这些真菌代谢物的除草作用，获得的结果似乎表明除草损伤是由细胞破坏引起的。当浓度高于 50 ppm 时，福马拉酯会导致黄瓜子叶盘发生显着且快速的电解质泄漏。 (C) 1998 Elsevier Science Ltd. 保留所有权利。
A culture broth of Nigrospora sacchari showed strong herbicidal activity in treatment of intact greenhouse-grown plants. Three lactones were isolated from the culture broth. The. major compound, which exhibited the most significant effect of the fungal metabolites in the assay procedures, was identified as (+)-phomalactone, 6-(1-propenyl)-5,6-dihydro-5-hydroxy-2H pyran-2-one. Others were 5-[1-(1-hydroxybut-2-enyl)]-furan-2-one and 5-[1-(1-hydroxybut-2-enyl)l-dihydrofuran These fungal metabolites were investigated for their herbicidal effects in an electrolyte leakage assay and the results obtained appeared to indicate that the herbicidal damage was caused by cellular disruption. Phomalactone caused remarkable and rapid electrolyte leakage on cucumber cotyledon discs at concentrations higher than 50 ppm. (C) 1998 Elsevier Science Ltd. All rights reserved.