论文部分内容阅读
利用遗传背景一致而抗病性不同的岱 16变异品系和抗病品种中 12 ,研究了接种棉花枯萎病菌 (Fusarium oxysporum f.sp.vasinfectum)及用枯萎病菌粗毒素处理后 ,棉苗维管束的病理变化。研究结果表明 ,接种枯萎病菌后 ,病株茎部导管及薄壁细胞中有枯萎菌丝存在。发病严重的感病品种原岱 16有菌丝的导管数最多 ,抗病品种早熟岱 16抗最少。所有品种中均出现胶状物或侵填体堵塞导管 ,这种现象在抗病品种中更为明显。病菌粗毒素处理后 ,棉苗茎及叶柄导管内也出现侵填体或胶状物堵塞导管 ,抗病品种茎部导管堵塞快。
By using Fusarium oxysporum f.sp. vasinfectum, a strain with the same genetic background and different disease resistance, and resistant variety 12, the effects of inoculation of Fusarium oxysporum f.sp. vasinfectum Pathological changes. The results showed that after the inoculation of Fusarium wilt, there were withered hyphae in the stems and parenchyma cells of diseased plants. The most susceptible cultivars were Dai-16 with the largest number of mycelium catheters, and the least resistant cultivars were Dai-16. In all varieties, jelly or tampon blocked the catheter, which is more obvious in resistant varieties. Pathogen crude toxin treatment, the cotton seedling stem and petiole catheter also appeared intruded or jelly plug catheter, resistant varieties of stem conduit plugging fast.