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园艺学报 ›› 2011, Vol. 38 ›› Issue (11): 2092-2098.

• 果树 • 上一篇    下一篇

香蕉枯萎病菌新毒素——白僵菌素的鉴定

李春雨1,*,陈 石2,*,左存武1,*,邝瑞彬1,易干军1,**   

  1. (1广东省农业科学院果树研究所,广州 510640;2福建省农业科学院闽台园艺研究中心,福建漳州 363005)
  • 收稿日期:2011-05-23 修回日期:2011-10-20 出版日期:2011-11-25 发布日期:2011-11-25
  • 通讯作者: 易干军

Identification of Beauvericin,a Novel Mycotoxin from Fusarium oxysporum f. sp. cubense

LI Chun-yu1,*,CHEN Shi2,*,ZUO Cun-wu1,*,KUANG Rui-bin1,and YI Gan-jun1,**   

  1. (1Institution of Fruit Tree Research,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China;2Fujian-Taiwan Horticulture Research Center,Fujian Academy of Agricultural Sciences,Zhangzhou,Fujian 363005,China)
  • Received:2011-05-23 Revised:2011-10-20 Online:2011-11-25 Published:2011-11-25
  • Contact: YI Gan-jun

摘要: 调查并分离了广东、海南、广西、福建和云南等香蕉枯萎病疫区的一批病原菌样本。利用高效液相色谱—电喷雾离子阱质谱(HPLC-ESI-MS)法对所分离的28个Fusarium oxysporum f. sp. cubense菌株的次生代谢产物进行初步分析。发现了分子量为179 D的镰刀菌酸及分子量约为783 D的未知产物;利用1H-NMR对一株4号生理小种的未知产物进行了结构测定,结果表明该化合物为白僵菌素。离体试验表明白僵菌素能够导致香蕉假茎腐烂。

关键词: 香蕉枯萎病, 白僵菌素, 结构, 毒性

Abstract: The 28 isolates of Fusarium oxysporum f. sp. cubense(Foc)including Race 1 and 4 were collected from the banana Fusarium wilt diseases epidemic areas of Guangdong,Hainan,Guangxi,Fujian and Yunnan provinces. The secondary metabolites were analyzed by HPLC-ESI-MS. We found fusaric acid which the molecular weight is 179 Dalton and another compound with a molecular weight of 783 Dalton. The latter was purified and identified to be beauvericin by 1H-NMR. Experiments in vitro proved that the banana pseudostem rot caused by the beauvericin which was produced by Foc.

Key words: Fusarium wilt of banana, beauvericin, structure, toxicity

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