摘要： 测试了12个具有不同抗性的棉花品种根冠细胞对棉花黄萎病毒素的敏感性, 以孢子悬浮液苗期接种和毒素醮根为对照。试验结果表明, 供试品种的根冠细胞死亡率与苗期接种病指和幼苗萎蔫指数均呈正相关, 相关系数分别为0.719与0.816, 试验证明, 利用离体根冠细胞对毒素的敏感差异鉴定品种抗性, 操作简便, 结果可靠, 适于大批量鉴定。

关键词: 棉花, 棉花黄萎病菌, 真菌毒素, 根冠细胞

Abstract: The sensitivity of root cap cells of twelve cotton varieties to toxin produced by Verticillium dahliae had been tested. The results were compared with the disease index of seedlings inoculated with V. codidia and the wilt index of seedlings immersed in the toxin. The experimental results showed that death rate of root cap cells treated with toxin was highly correlated with the disease index and the wilt index. The coefficients of correlation were 0.719 and 0.816 respectively. The results indicated that large-scale screening for resistance to V dahliae can be accomplished accuratel yand rapidly by using this method.

Key words: Cotton, Veriicillium dahliae, Toxin, Root cap cells