尖孢镰刀菌(Fusarium oxysporum,Fo)是导致农作物枯萎的土传性真菌病害,该病害严重制约了农业的可持续发展.效应因子是病原菌与农作物互作过程中的关键因子,对其作用机理解析可为病菌病害防治提供切实有效的策略.Fo在侵染农作物时,会在其维管束木质部分泌一种蛋白,称为SIX效应蛋白(Secreted In Xylem).为了研究SIX效应因子在病原菌Fo与寄主植物间的作用方式,分析了SIX效应因子在Fo染色体组上的结构特点,归纳了SIX效应因子鉴别Fo不同的专化型和生理小种、影响Fo致病性以及影响寄主植物免疫反应等方面的功能特点,并指出SIX效应因子不仅对寄主植物有毒力作用,还能与植物发生非亲和互作来影响病原菌的入侵.本研究结果揭示了SIX效应因子在不同方面对植物的作用与影响,也为植物抗病分子机理研究和植物抗病品种选育提供了理论支持.
Research Progress on SIX Effectors of Fusarium oxysporum
Fusarium oxysporum (Fo) is a soil-borne fungal disease that causes crop wilting,which is a serious constraint to the sustainable development of agriculture. Effectors are key factors in pathogen-plant interactions,and their mechanism of action can be analyzed to provide effective strategies for controlling plant diseases. When Fo infects crops,it secretes a protein in the xylem of vascular bundles,which is called Secreted In Xylem effector protein (SIX). In order to study the role of SIX effectors between Fo and plants,the structural characteristics of SIX on the Fo genome were analyzed. The functional attributes of SIX in identifying different formae speciales and physiological races of Fo,influencing the pathogenicity of Fo,and affecting the immune response of plants were summarized. It was pointed out that SIX had toxic effects on plants and could interact with plants in an incompatible manner to influence the invasion of pathogens. The results of this study reveal the effects of SIX on plants in different aspects and provide theoretical support for the study of the molecular mechanism of plant disease resistance and the selection and breeding of disease-resistant varieties.
万方数据
维普
