【摘要】 条锈菌 ( Puccinia striiformis W.)侵染高温抗病品种后 ,抗性表达后与表达前比较 ,条锈菌产孢量显著减少 ,产孢期缩短 ,但孢子萌发率不受表达前后限制。组织病理学观察发现 ,高温抗性表达前 ,寄主内菌落面积大且增长快 ,吸器母细胞数目多 ,后期可产生少量寄主坏死细胞 ,但不足以抑制菌丝的扩展 ;高温抗性表达后 ,接种后 48h即产生典型的寄主细胞坏死 ,后期寄主坏死细胞连片 ,菌落扩展明显受抑 ,菌落稀且面积小更多还原

【Abstract】 After showing high temperature resistance in moderate temperature in wheat,the quantities of spores of Puccinia striifomis W.declined markedly in inoculated leaves,and the duration of sporulation shortened.But the hith temperature didnt depress the germinations of the spores of Puccinia striiformis W.The research results of the histopathology found that necrosises of host cells occurred soon after formating the first haustoria mother cells,the linar lengths of colonies were very small and the haustoria mother cells decreased strongly.These features are similar to the “hypersensitive necrosis type”.更多还原