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A native fungal symbiont facilitates the prevalence and development of an invasive pathogen-native vector symbiosis

文献类型： 外文期刊

作者： Zhao, Lilin 1 ; Lu, Min 1 ; Niu, Hongtao 3 ; Fang, Guofei 4 ; Zhang, Shuai 1 ; Sun, Jianghua 1 ;

作者机构： 1.Chinese Acad Sci, State Key Lab Integrated Management Pest Insects, Inst Zool, Beijing 100101, Peoples R China

2.Univ Pretoria, Tree Protect Cooperat Programme, Forestry & Agr Biotechnol Inst, ZA-0002 Pretoria, South Africa

3.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China

4.State Forestry Adm, Gen Stn Forest Pest & Dis Control, Shenyang 110034, Peoples R China

关键词： Bursaphelenchus xylophilus;Eastern China;infection vector;invasion;Monochamus alternatus;multispecies interactions;ophiostomatoid fungi;pathogen-insect symbioses

期刊名称：ECOLOGY （ 影响因子：5.499； 五年影响因子：6.001 ）

ISSN： 0012-9658

年卷期： 2013 年 94 卷 12 期

页码：

收录情况： SCI

摘要： Invasive pathogen-insect symbioses have been extensively studied in many different ecological niches. Whether the damage of symbioses in different introduced regions might be influenced by other microorganisms has, however, received little attention. Eight years of field data showed that the varied levels of the nematode and beetle populations and infested trees of the invasive Bursaphelenchus xylophilus-Monochamus alternatus symbiosis were correlated with patterns in the isolation frequencies of ophiostomatoid fungi at six sites, while the laboratory experiments showed that the nematode produced greater numbers of offspring with a female-biased sex ratio and developed faster in the presence of one native symbiotic ophiostomatoid fungus, Sporothrix sp. 1. Diacetone alcohol (DAA) from xylem inoculated with Sporothrix sp. 1 induced B. xylophilus to produce greater numbers of offspring. Its presence also significantly increased the growth and survival rate of M. alternatus, and possibly explains the prevalence of the nematode-vector symbiosis when Sporothrix sp. 1 was dominant in the fungal communities. Studying the means by which multispecies interactions contributed to biogeographical dynamics allowed us to better understand the varied levels of damage caused by biological invasion across the invaded range.

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