过刊浏览

细胞壁羟脯氨酸和游离脯氨酸与棉花对枯萎病抗性的关系

宋凤鸣, 郑重

浙江农业大学植保系. 浙江,杭州 310029

摘要

氟乐灵处理能推迟棉苗枯萎病症状的出现、降低发病株率和病情指数, 说明氟乐灵处 理能提高棉苗对枯萎病的抗性。在健康棉苗中, 抗病品种细胞壁结合的羟脯氨酸含量显 著高于感病品种, 但游离脯氨酸含量无明显差异。在氟乐灵处理和未处理而接种棉枯萎 病菌的两个实验中, 两个品种的细胞壁结合的羟脯氨酸和游离脯氨酸含量均高于各自的健康株对照, 而且抗病品种中的含量都高于感病品种, 说明细胞壁结合的羟脯氨酸和游离脯氨酸的积累是氟乐灵诱发的抗病性表现及棉苗受枯萎病菌侵染后抗性反应的生化机制之一。

关键词： 棉花枯萎病; 氟乐灵; 游离脯氨酸; 羟脯氨酸

Involvement of cell-wall hydroxyproline and free proline in the resistance of cotton seedlings to Fusarium Wilt

Song Fengming, Zheng Zhong

Department of Plant Protection, Zhejiang Agricultural University. Hangzhou 310029,Zhejiang

Abstract

It was found that the trifluralin treatment enhanced the resistance of cotton seedlings to Fusarium) wilt with delayed disease development and reduced disease incidence and severity. When cotton seedlings were pretreated with trifluralin or inoculated with F. oxysporum) f. sp. vasinfectum), the levels of cell-wall hydroxyproline and free proline in tissues of both cultivars in creased markedly and those in the resistant cultivar increased more markedly han those in the susceptible one. Therefore, the accumulation of both cell-wall hydroxyproline and free proline in the tissues is considered to be a biochemical response of cotton seedlings to trifluralin treatment and/ or pathogen infection.

Key words: cotton (Gossypium hirsutum);Fusarium wilt;Trifluralin;Free proline

收稿日期：　　录用日期：

通讯作者：　　E-mail:

引用本文：

宋凤鸣, 郑重. 细胞壁羟脯氨酸和游离脯氨酸与棉花对枯萎病抗性的关系[J]. 生理学报 1995; 47 (3): .

Song Fengming, Zheng Zhong. Involvement of cell-wall hydroxyproline and free proline in the resistance of cotton seedlings to Fusarium Wilt. Acta Physiol Sin 1995; 47 (3): (in Chinese with English abstract).