病原物协同致病性对棉花黄萎病严重度的影响

doi:10.11963/1002-7807.zfzsj.20180309

摘要/Abstract

摘要： 大丽轮枝菌是1种土传的维管束病原菌，由其引起的棉花黄萎病是我国棉花生产上最重要的病害之一。而最近发现了1种土壤习居的机会病原真菌棉帚霉菌能通过伤口侵入寄主，并与大丽轮枝菌协同加重棉花黄萎病严重度。棉帚霉菌能在营养非常贫乏的基质中产生分生孢子；超微结构观察也证实该病原菌在维管束组织中存在，并能产孢，显示了该真菌具有维管束病原菌的生物学特性。另外，土壤中的线虫活动可能使棉花根部产生伤口，也能促进病原菌的侵染。在总结分析生物学特性、侵染与互作机制等研究进展的基础上，提出建立棉花根围多病原物与寄主互作体系可深入研究棉帚霉菌与大丽轮枝菌协同致病机制的观点。

关键词: 棉花; 大丽轮枝菌; 棉花黄萎病; 帚霉菌; 生物学特性; 协同致病性

Abstract: Verticillium dahliae is a soil-borne and vascular pathogen causing Verticillium wilt of cotton, which is one of the most severe diseases affecting cotton production in China. Recently, a soil-inhabiting opportunistic pathogen was isolated and identified as Scopulariopsis gossypii; it could infect the host through wounds and increase disease severity in combination with V. dahliae. S. gossypii was able to form conidia in a nutritionally poor substrate and had similar biological characteristics to other vascular pathogens, while ultrastructure observation also confirmed that it was present in vascular tissue of cotton plants and produced conidia. Nematode activity in soil could cause wounds on the surface of cotton roots resulting in infection by the pathogens. On the basis of our analysis of the biological characteristics and infection process of S. gossypii and its interactions with other pathogens in cotton plants, we propose establishing a research program for multipathogen-host interactions in the cotton rhizosphere, which will enable detailed investigation of the synergistic pathogenesis of S. gossypii and V. dahliae.

Key words: Gossypium; Verticillium dahliae; Verticillium wilt; Scopulariopsis gossypii; biological characteristics; synergistic pathogenicity

中图分类号:

S435.621

张帆, 李晓林, 张敬泽, 祝水金. 病原物协同致病性对棉花黄萎病严重度的影响[J]. 棉花学报, 2018, 30(2): 188-196.

Zhang Fan, Li Xiaolin, Zhang Jingze, Zhu Shuijin. Effect of Pathogen Synergistic Pathogenicity on Severity of Verticillium Wilt of Cotton[J]. Cotton Science, 2018, 30(2): 188-196.

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