昆虫学报2008，Vol.51Issue(6)：595-600,6.
光滑足距小蠹虫道真菌的组成和变化
Composition and variety of the ambrosia fungi associated with ambrosia beetle,Xylosandrus germanus(Blandford)(Coleoptera:Scolytidae)
摘要
Abstract
The species composition and variety of the fungi in the gallery system and in the mycangium of Xylosandrus germanus(Blandford)at various developmental stages were investigated by isolation experiments and scanning electron microscopy.Ambrosiella hartigii Batra was the only fungus isolated form the mycangia of the dispersal,boring,overwintering aml newly sclerotized adults but not the callow adults.The lowest frequency of the fungus isolated from the mycangium occurred in the newly sclerotized adults.The fungi isolated from galleries consisted of A.about 40%-60%during the period from egg to pupal stage,while A.kiliense and Fusarium sp.1 accounted for 34.6%and 34.6%from the adult galleries,respectively.A.hartigii was always isolated from galleries from the egg to pupal stage.Scanning electron microscopy showed that the conidiophores and conidia of A.hartigii were predominantly occurred at the bottom of galleries from the egg to pupal stage,whereas Fusarium spp.were predominantly occurred in the mature adult galleries.These results indicated that A.kiliense,two species of Fusarium as well as A.hartigii were associated with X.germanus and that the composition and the relative dominance of the fungi in the gallery system and in the mycangium varied with developmental stages of the beetle.This study suggests that the composition and variety of the fungi are likely related to nutritional requirement of larval and adult beetles as well as growth characteristics of the fungi.关键词
光滑足距小蠹/虫道真菌/坑道/贮菌器/种类组成/优势种Key words
Xylosandrus germanus/ambrosia fungi/mycangia/gallery/species composition/dominant species分类
生物科学引用本文复制引用
杨群芳,叶华智,张敏..光滑足距小蠹虫道真菌的组成和变化[J].昆虫学报,2008,51(6):595-600,6.基金项目
四川省科技厅应用基础项目(2006J13-040) （2006J13-040）
