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【目的】明确新疆主要植棉地区棉花黄萎病菌株的生物学特性及致病力分化情况。【方法】纯化培养采集的菌株,观察其生物学特性;利用鉴别寄主法测定棉花黄萎病菌的致病力。【结果】棉花黄萎病菌菌落形态各异,供试菌系大部分可产生微菌核;供试菌株的最适生长温度为25℃,部分菌株对高温具有一定的耐受性;新疆棉花黄萎病菌可分为强、中、弱3种致病型,其中以中等致病类型为主。【结论】新疆棉区棉花黄萎病菌具有明显的生理分化现象,博乐地区采集的VX27菌株致病力最强。
【Objective】 The objective of this study was to determine the biological characteristics and pathogenicity of Verticillium dahliae in cotton growing areas in Xinjiang. 【Method】 The collected strains were purified and their biological characteristics were observed. The pathogenicity of Verticillium dahliae was determined by differential host assay. 【Result】 The results showed that the colonies of Verticillium dahliae were different, and most of the tested strains could produce Microbial sclerotia. The optimal growth temperature of the tested strains was 25 ℃, some of them were tolerant to high temperature. Verticillium can be divided into strong, moderate and weak three kinds of pathogenic type, of which the main type of pathogenic. 【Conclusion】 Verticillium dahliae has obvious physiological differentiation in Xinjiang cotton area. VX27 strain collected in Bole region has the strongest pathogenicity.