纵坑切梢小蠹伴生菌危害机理的研究  

Pathogenic mechanisms of Leptographium yunnanense,a fungus associated with Tomicus piniperda L.

作　　者：廖周瑜[1] 叶辉[1] 

机构地区：[1]云南大学生态学与地植物学研究所,云南昆明650091

出　　处：《中国森林病虫》2002年第3期3-5,共3页Forest Pest and Disease

基　　金：云南省应用基础研究基金项目 (1999C0 0 12M)资助

摘　　要：该文对纵坑切梢小蠹伴生菌Leptographiumyunnanense的危害机理作了初步研究 ,结果表明 ,L .yunnanense在与小蠹虫伴随侵入后 ,产生致病毒素对寄主树木进行危害 ,从而辅助纵坑切梢小蠹成功定殖于寄主树木内。该毒素在低浓度条件下仍维持一定的致病力 。The results showed that there are some pathogenic toxins in the culture filtrates of Leptographiam yunnanense,and the toxins can keep its pathogenic activity even in lower concentration.This is a very important advantageous factor for the Tomicus piniperda to break through the hosts(Pinus yunnanensis)defensive screen and successfully settle in the host.

关 键 词：纵坑切梢小蠹 伴生菌 危害机理 毒素 

分 类 号：S763[农业科学—森林保护学]