渍水土壤中小麦矮化腥黑穗病菌活性研究  

Research of the Activity of Dwarf Bunt of Wheat (Tilletia contraversa Kiihn) in Waterlogged Soil

作　　者：罗加凤[1] 廖芳[1] 黄国明[1] 崔铁军[1] 刘跃庭[1] 王志英[1] 

机构地区：[1]天津出入境检验检疫局,天津300456

出　　处：《西南大学学报（自然科学版）》2007年第7期102-106,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家质量技术监督检验检疫总局课题资助项目(B228-2003;IK2004037).

摘　　要：小麦矮化腥黑穗病菌(Tilletia controversa K(?)hn)冬孢子具有很强的抗逆性,在土壤中可存活10 a以上,该病害的阻断是一个历久弥新的问题.试验将小麦矮化腥黑穗病菌冬孢子埋于种植水稻的稻田,通过对埋土前后冬孢子的萌发率和自体荧光率的测定,研究小麦矮化腥黑穗病菌在稻田中活性的变化及冬孢子萌发与自体荧光之间的关系.2a试验结果表明:随着处理时间的延长,冬孢子的萌发率和自体荧光率均逐渐降低,经过一个完整稻季处理后,病菌冬孢子萌发活性和自体荧光特性都全部丧失,丧失自体荧光的冬孢子,其萌发活性也相应丧失.Teliospores of Tilletia contraversa Kuehn （TCK） have a strong resistance to adverse environment and they can survive in soil as long as ten years. The interdiction of this pathogen has been a very tricky problem all the time in plant quarantine. In this study, the teliospores of TCK were put in an aqueous soil in a paddy field and their rates of germination and autofluorescence were measured before and after burial. The change of viability of the pathogen and the relationship between germination and autofluorescence of the teliospores in the paddy field were investigated. The results of the two-year experiment indicated that the rates of germination and autofluorescence of teliospores declined gradually over time, that after a whole cycle of rice growth, the germination and autofluorescence of the teliospores were completely lost and that with the loss of autofluorescence the teliospores lost their germination activity accordingly.

关 键 词：小麦矮化腥黑穗病菌 冬孢子 稻田 萌发率 自体荧光 

分 类 号：S432.1[农业科学—植物病理学] S435.121.44[农业科学—农业昆虫与害虫防治]