摘要
黄萎病严重危害棉花生产。本试验以温室种植31个不同抗性的棉花品种为材料,通过对供试品种的组织结构研究,使用根系扫描法和石蜡切片法,了解棉花对黄萎病的抗性机制。结果如下:棉花根系的吸收根根长密度与相对病指呈显著正相关,相关系数为0.923;抗病品种与耐病品种、感病品种的总长度、总投影面积、总表面积和吸收根根长密度差异显著,但耐病品种与感病品种的这4个指标差异不显著。抗病材料根、茎的组织中薄层细胞密度大于感病材料,耐病品种根、茎的薄层细胞密度介于两者之间;抗病品种的根和茎的导管数最多,导管直径最小,其次是耐病品种,感病品种的根和茎中导管数最少,但是导管直径最大。棉花根系的吸收根根长密度,根和茎的薄层细胞密度,导管数可以作为对黄萎病抗性的检测指标。
Verticillium dahliae Kleb.harms seriously production of cotton.Thirty-one cotton cultivars with different resistance were used in the greenhouse,aimed to analyse the resistance to Verticilium wilt in cotton.Tissue structure was studied to realize the resistance mechanism of cotton to Verticilium wilt using the method of root scanning and paraffin slice.The results showed that：the density of roots which absorbed water and nutrition had correlation with the disease index,r=0.923.There was significant difference in total root length,total projective area,total surface area and absorbable root length density among the resistance,tolerance and susceptible cultivars.But the difference between those of the tolerance and susceptible cultivars were not significant.The density of xylem parenchyma cells and vessel numbers in root and stem of resistant cultivars were the biggest,that of tolerant cultivars were the next and that of susceptible ones were the least,but the diameter of vessels were contrary.The absorbable root length density,density of xylem parenchyma cells and vessel numbers in root and stem can be used as measuring index of resistance to verticillium wilt in cotton.
出处
《植物病理学报》
CAS
CSCD
北大核心
2011年第5期502-508,共7页
Acta Phytopathologica Sinica
基金
新疆维吾尔自治区科技厅重大专项"高产优质抗逆类型棉花新品种选育"(No.2007331-4)
新疆维吾尔自治区科技厅高新技术"棉枯
黄萎病抗病子品种(系)创制"(No.200810101)
关键词
棉花
黄萎病
组织结构
抗性机制
cotton
verticillium wilt
tissue structure
resistant mechanism
