摘要
不同抗病性的大麦品种,在大田感染了大麦黄花叶病毒(BaYMV)后,从叶片和根的超微结构观察表明:(1)除感病和耐病品种外,首次在抗病性品种中发现有病毒存在,但病毒含量很低:(2)BaYMV对叶绿体结构有一定的影响,外部病症严重的叶片其解体或发育不全的叶绿体比例显著高于无病症的叶片;(3)感病后期细胞中的部分线粒体出现肥大和自溶;(4)感病细胞的细胞膜松弛,在细胞壁和膜之间有代谢物沉积,并有细胞膜溶解现象;膜状结构内质网肥大,有病毒内含体附着其上;(5)感染细胞中除发现片层、单向风轮状和多向风轮状内含体之外,还见到带柄风轮状内含体和堆束状病毒纤维。最后,初步讨论了BaYMV感染大麦后的细胞学变化与外部症状的相互关系以及大麦抗病性品种的抗性机理。
From naturally field-infected barley cultivars with different resistance to BaYMV, the ultrastructural analysis of roots and leaves showed that (1) the BaYMV were found in all materials but the concentration of virus roughly corresponded with the severity of symptoms, (2)the chloroplast structure was destroyed by BaYMV, and the number of destroyed or dysplasia chloroplast in leaf cells with serious symptoms were more than that in leaves without symptoms,(3)the matrix of mitochondria in cells infected by BaYMV decreased and some of them expanded and destructed, (4) in cells infected by BaYMV, the cell plasma membrane and endoplasmic reticulum loosed and destructed, and some of the viruses associated with ER, (5) not only laminated inclusion, one side orientated pinwheel and all side orientated pinwheel inclusions, but also pinwheel with stem inclusions were found in cells infected by BaYMV.Finally, the relation of cytological change with external symptoms were discussed on the basis of results obtained in the present study.
出处
《植物病理学报》
CAS
CSCD
北大核心
1991年第2期113-119,共7页
Acta Phytopathologica Sinica
基金
国家自然科学基金
上海市科委资助
