稻粒黑粉菌对水稻不育系的侵染过程  

Infection Process of Neovossia horrida in Male Sterile Rice

作　　者：陶家凤[1] 周开达[1] 朱建清[1] 

机构地区：[1]四川农业大学水稻研究所,中国温江611130

出　　处：《西南农业学报》1998年第2期68-72,共5页Southwest China Journal of Agricultural Sciences

基　　金：四川省科委应用基础项目

摘　　要：用Neovossia　horrida的次生小孢子，在田间和离体接种水稻不育系的试验证明，病菌以菌丝从柱头直接侵入，经花柱到达子房的珠心组织。接种后8小时在子房中发现菌丝，第7天在种皮和糊粉层之间形成初生冬孢子，第9天冬孢子成熟。病菌在4个不育系上的侵染过程相似。病菌在无需授粉的条件下就能侵入、但只在胚乳能正常发育的水稻子房中形成冬孢子。Male sterile rice plants were inoculated with secondary sporidia of Neovossia horrida in field and isolated in laboratory.It was found that the hyphae of fungus penetrated directly through the stigma to the style and finally to the ovary 8 hrs afterinoculation. The mycelia remained in nucellus tissue. The initial teliospore formed between the aleurone layer and seed coat7 days aftr inoculation, and it matured in 9 days. The infection process of Neovossia horrida in these four male sterile linesof rice was almost similar. Fungus might penetrated through stigma without pollination, but the formation of teliospore occured only in the normally developing endosperma.Keywods:Neovossia horrida Infection process Teliospore Ovary

关 键 词：水稻 稻粒黑粉菌 侵染过程 冬孢子 子房 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]