Dangerous liaisons: The symbiosis of entomopathogenic nematodes and bacteria

被引:92
作者
Ciche, Todd A. [1 ]
Darby, Creg
Ehlers, Ralf-Udo
Forst, Steven
Goodrich-Blair, Heidi
机构
[1] CALTECH, Div Biol, Pasadena, CA 91106 USA
[2] Univ Alabama Birmingham, Dept Microbiol, Birmingham, AL 35294 USA
[3] Univ Kiel, Dept Biotechnol & Biol Control, Inst Phytopathol, D-24223 Raisdorf, Germany
[4] Univ Wisconsin, Dept Biol Sci, Milwaukee, WI 53201 USA
[5] Univ Wisconsin, Dept Bacteriol, Madison, WI 53706 USA
关键词
Heterorhabditis; Steinernema; Photorhabdus; Xenorhabdus; Caenorhabditis; mutualism; life-cycle; genetics; RNAi;
D O I
10.1016/j.biocontrol.2005.11.016
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Two phylogenetically distinct groups of the entomopathogenic nematodes, Heterorhabditis and Steinernema, are vectors for enteric insect pathogenic bacteria, Photorhabdus Boemare et al., spp. and Xenorhabdus Poinar and Thomas spp., respectively. The general life-cycles of the two vector-borne diseases of insects are similar, with the infective (i.e., clatter) juvenile (IJ) stage nematode transmitting symbiotic bacteria into the hemocoel of an insect host. Common features of the symbioses are the selective transmission of symbiotic bacteria by IJ nematodes and requirement for the bacteria for pathogenicity to insects and efficient growth and reproduction within the insect cadaver. Genetic and molecular biological tools have recently been applied to elucidate symbiosis-related genes in both bacterial genera, and genome sequences are either completed (Photorhabdus luminescens) or underway (Photorhabdus asymbiotica, Xenorhabdus spp.). Genetic analyses of symbiotic bacteria are revealing intimate interactions among nematode vector, symbiont and insect host that are specific to each symbiosis. Results from these studies and challenges in applying tools and knowledge from the well-studied nematode, Caenorhabditis elegans, to entomopathogenic nematodes are the topic of this review. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:22 / 46
页数:25
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