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首页> 美国卫生研究院文献>International Journal of Molecular Sciences >Bacteria from the Midgut of Common Cockchafer (Melolontha melolontha L.) Larvae Exhibiting Antagonistic Activity Against Bacterial Symbionts of Entomopathogenic Nematodes: Isolation and Molecular Identification
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Bacteria from the Midgut of Common Cockchafer (Melolontha melolontha L.) Larvae Exhibiting Antagonistic Activity Against Bacterial Symbionts of Entomopathogenic Nematodes: Isolation and Molecular Identification

机译：常见金龟子（Melolontha melolontha L.）幼虫中肠细菌对昆虫病原线虫细菌共生体具有拮抗活性：分离和分子鉴定。

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摘要

The mechanisms of action of the complex including entomopathogenic nematodes of the genera and and their mutualistic partners, i.e., bacteria and , have been well explained, and the nematodes have been commercialized as biological control agents against many soil insect pests. However, little is known regarding the nature of the relationships between these bacteria and the gut microbiota of infected insects. In the present study, 900 bacterial isolates that were obtained from the midgut samples of larvae were screened for their antagonistic activity against the selected species of the genera and . Twelve strains exhibited significant antibacterial activity in the applied tests. They were identified based on 16S rRNA and , , or gene sequences as , , , , sp., , and sp. The culture filtrate of the isolate MMC3 L3 04 exerted the strongest inhibitory effect on the tested bacteria. The results of the preliminary study that are presented here, which focused on interactions between the insect gut microbiota and mutualistic bacteria of entomopathogenic nematodes, show that bacteria inhabiting the gut of insects might play a key role in insect resistance to entomopathogenic nematode pressure.
机译：复合物的作用机理已得到很好的解释，其中包括该属的昆虫病原线虫和它们的相互伴侣，即细菌和线虫，并且该线虫已被商品化为针对许多土壤害虫的生物防治剂。然而，关于这些细菌与被感染昆虫的肠道菌群之间关系的性质了解甚少。在本研究中，筛选了从幼虫中肠样品中获得的900种细菌分离株对所选属和种的拮抗活性。在应用测试中，十二个菌株表现出显着的抗菌活性。根据16S rRNA和，或基因序列，，，sp。和sp进行鉴定。分离株MMC3 L3 04的培养滤液对被测细菌具有最强的抑制作用。此处提供的初步研究结果集中于昆虫肠道菌群和昆虫病原线虫的互生细菌之间的相互作用，表明居住在昆虫肠道内的细菌可能在昆虫对昆虫病原线虫压力的抵抗中起关键作用。

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