温度对纵坑切梢小蠹伴生菌——云南半帚孢生长的影响  

Influence of Temperature on the Growth of Fungus ( Leptographium yunnanense ) Associated with Tomicus piniperda

作　　者：廖周瑜[1] 叶辉[1] 吕军[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：《林业科学研究》2002年第3期338-342,共5页Forest Research

基　　金：云南省应用基础研究基金 (1999C0 0 12M)部分内容

摘　　要：本文研究了纵坑切梢小蠹伴生菌云南半帚孢Leptographiumyunnanense在不同温度下 ,在PDA培养基、云南松木段和活树上的生长变化情况 ,结果表明 :在 5　 2 0℃温度范围内 ,真菌的生长随温度的升高而加快 ,云南松韧皮反应区长度逐渐增大 ;在 2 0　 35℃温度范围内 ,真菌的生长随温度的升高而逐渐减弱 ,韧皮反应区逐渐减小。说明温度变化使真菌的生长力与云南松的抗性之间的对比力量改变 。Leptographium yunnanense is a blue stain phytopathogenic fungus associated with Tomicus piniperda , which can assist the beetles in overcoming the resistance of their host trees The length of phloem reaction zone induced by inoculation of blue stain fungus is often used as a measure of fungal virulence or level of tree resistance, with longer reaction zone length implying a more virulent fungus or a physiologically weaker host tree This paper reports the influence of temperature on the growth of the fungus and the resistance of its host trees( Pinus yunnanensis ) The growth length of L yunnanense increases with temperature from 5 ℃ to 20 ℃, and the phloem reaction zone length also gradually increases; with temperature from 20 ℃ to 35 ℃, the growth length of the fungus gradually decreases, and the phloem reaction zone length also gradually decreases But these couldn't reflect the variation of the host trees' resistance or the fungus' virulence,they only mean that the variation of temperature has changed the competence abilities between the virulence of the fungus and the resistance of the host trees, and thus results in the variations between fungus growth length and the phloem reaction zone length

关 键 词：伴生菌 纵坑切梢小蠹 云南半帚孢 云南松 

分 类 号：S763.712.4[农业科学—森林保护学] S763.38[农业科学—林学]