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Toxins (Basel)

Title:		Corynebacterium sp. 2-TD Mediated Toxicity of 2-Tridecanone to Helicoverpa armigera
Author(s):		Gu M; Xue Z; Lv S; Cai Y; Zhang L; Gao X;
Address:		"Department of Entomology, College of Plant Protection, China Agricultural University, Beijing 100193, China"
Journal Title:		Toxins (Basel)
Year:		2022
Volume:		20221011
Issue:		10
Page Number:		-
DOI:		10.3390/toxins14100698
ISSN/ISBN:		2072-6651 (Electronic) 2072-6651 (Linking)
Abstract:		"Cotton bollworm (Helicoverpa armigera) is a Lepidopteran noctuid pest with a global distribution. It has a wide range of host plants and can harm cotton, tomato, tobacco, and corn, as well as other crops. H. armigera larvae damage the flower buds, flowers, and fruits of tomato and cause serious losses to tomato production. Tomato uses the allelochemical 2-tridecanone to defend against this damage. So far, there have been no reports on whether the adaptation of H. armigera to 2-tridecanone is related to its symbiotic microorganisms. Our study found that Corynebacterium sp. 2-TD, symbiotic bacteria in H. armigera, mediates the toxicity of the 2-tridecanone to H. armigera. Corynebacterium sp. 2-TD, which was identified by 16S rDNA gene sequence analysis, was screened out using a basal salt medium containing a unique carbon source of 2-tridecanone. Then, Corynebacterium sp. 2-TD was confirmed to be distributed in the gut of H. armigera by quantitative PCR (qPCR) and fluorescence in situ hybridization (FISH). The survival rate of H. armigera increased by 38.3% under 2-tridecanone stress after inoculation with Corynebacterium sp. 2-TD. The degradation effect of Corynebacterium sp. 2-TD on 2-tridecanone was verified by ultra-high-performance liquid chromatography (UPLC). Our study is the first to report the isolation of gut bacteria that degrade 2-tridecanone from the important agricultural pest H. armigera and to confirm bacterial involvement in host adaptation to 2-tridecanone, which provides new insights into the adaptive mechanism of agricultural pests to host plants"
Keywords:		"Animals In Situ Hybridization, Fluorescence *Moths Larva Corynebacterium/genetics Pheromones/metabolism DNA, Ribosomal Carbon/metabolism 2-tridecanone Corynebacterium sp.2-TD Helicoverpa armigera metabolism toxicity;"
Notes:		"MedlineGu, Meng Xue, Zhaoxiang Lv, Shenglan Cai, Yuhao Zhang, Lei Gao, Xiwu eng Research Support, Non-U.S. Gov't Switzerland 2022/10/27 Toxins (Basel). 2022 Oct 11; 14(10):698. doi: 10.3390/toxins14100698"