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蛇床子素对植物病原真菌抑制机制的初步研究
引用本文:石志琦,沈寿国,徐朗莱,范永坚.蛇床子素对植物病原真菌抑制机制的初步研究[J].农药学学报,2004,6(4):28-32.
作者姓名:石志琦  沈寿国  徐朗莱  范永坚
作者单位:1.江苏省农业科学院 植物保护研究所,江苏 南京 210014
基金项目:江苏省自然科学基金资助项目(BK2002-128),江苏省"十五"科技攻关项目(BE2001-328).
摘    要:天然化合物蛇床子素(osthol)对草坪纹枯病菌Rhizoctonia solani、芒果炭疽病菌Colletotrichum musae、苹果叶枯病菌Rhizoctonia solani、辣椒疫霉病菌Phytophora capsici、辣椒炭疽(红)病菌Collectotrum gloesporioides、番茄灰霉病菌Botrytis cinerea Pers、油菜菌核病菌Sclerotinia sclerotiorum、小麦赤霉病菌Fusarium graminearum、苹果轮纹病菌Macrophoma kawatsukai、水稻稻瘟病菌Pyricularia grisea、西瓜枯萎病菌Fusarium oxysporum f.sp.niveum、棉花枯萎病菌Fusarium oxysporum f.sp.vasinfectum、棉花黄萎病菌Verticillium dahliae等有不同的抑制活性,对大多数病菌其抑制中浓度(EC50值)在21.15~61.62 μg/mL之间。以小麦赤霉病菌为研究对象,结果表明50 μg/mL蛇床子素对其孢子萌发有显著的抑制作用;100 μg/mL蛇床子素处理24 h后,菌丝大量断裂,可溶性蛋白含量增加,菌体葡萄糖含量呈"V"型变化,几丁质水解酶活性和几丁糖含量均高于对照。

关 键 词:蛇床子素    植物病原真菌    抑菌机制
文章编号:1008-7303(2004)04-0028-05
收稿时间:9/8/2003 12:00:00 AM
修稿时间:2003年9月8日

Inhibition Mechanism of Osthol to Plant Fungus Pathogens
SHI Zhi-qi,SHEN Shou-guo,XU Lang-lai and FAN Yong-jian.Inhibition Mechanism of Osthol to Plant Fungus Pathogens[J].Chinese Journal of Pesticide Science,2004,6(4):28-32.
Authors:SHI Zhi-qi  SHEN Shou-guo  XU Lang-lai and FAN Yong-jian
Institution:1.Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China2.Department of Biology Science,Nanjing Agricultural University,Nanjing 210095,China
Abstract:Natural compound osthol has been proved to have a wide spectrum of fungi inhibition including Rhizoctonia solani, Colletotrichum musae, Rhizoctonia solani , Phytophora capsici, Collectotrum gloesporioides, Botrytis cinerea Pers, Sclerotinia sclerotiorum, Fusarium graminearum, Macrophoma kawatsukai, with the value of EC50 ranged from 21.15 μg/mL to 61.62 μg/mL to some fungi. F. graminearuym was used to research the inhibition mechanism of osthol, the results showed 50 μg/mL osthol could inhibit the germination of its spores evidently. After treatment of osthol for 24 h, the hyphae of this fungus growing in aliqousculture came into large mounts of fragments. Glucose content decreased firstly and then increased to the level of control. Soluble proteins, chitin content and chitinase activity were higher than that of control.
Keywords:osthol  plant fungus pathogen  inhibition mechanism
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