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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
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Your Position :Home->Past Journals Catalog->2018年55 No.2

Biolog-ECO analysis of the functional diversity of the gut microbial community of deltamethrin-resistant and -sensitive diamondback moth Plutella xylostella (Lepidoptera: Plutellidae) larvae
Author of the article:LI Wen-Hong** LI Feng-Liang*** ZHOU Yu-Hang CHENG Ying JIN Jian-Xue
Author's Workplace:Guizhou Academy of Agricultural Sciences, Institute of Plant Protection, Guiyang 550006, China
Key Words: Plutella xylostella , gut microorganism, Biolog-Eco, metabolic diversity
Abstract:

[Objectives]  The gut microbiota of insect play an important role in food digestion, development and environmental adaptation. This study aims to compare the functional diversity of the gut microbial communities of deltamethrin-resistant and -sensitive diamondback moth larvae. [Methods]  Gut samples from 1st to 4th instar larvae of deltamethrin-resistant and -sensitive diamondback moths were analyzed with Biolog-ECO. [Results]  AWCD values from younger instar larvae were all higher than those of older larvae and AWCD values for larvae of the same age were nearly identical. Thirty tested carbon substrates were metabolized by all gut samples with the exception of the carboxylic acid substrate 2-Hydroxy benzoic acid. The Shannon and McIntosh indices of sensitive larvae were higher than those of the resistant larvae. The Shannon indices of 1st to 3rd instar sensitive larvae were nearly the same, and were higher than that of 4th instar larvae. Resistant larvae could be ranked in terms of the Shannon index as follows: 1st instar> 2nd instar>3rd instar>4th instar. In both sensitive and resistant larvae, the gut microbial McIntosh index was highest in the 1st instar, with 2nd to 4th instars having similar McIntosh index values. [Conclusion]  The physiological activity of larval gut microorganisms in younger larval instars was higher than that in older instars. The functional diversity of the gut microbial community differed between deltamethrin-resistant and -sensitive diamondback moth larvae.

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