Expression profiles of the cytochrome P450 gene <em>LmCYP6FD</em>3 in<em> Locusta migratoria</em> (Orthoptera: Acrididae) and its role in insecticide detoxification
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ACTA ENTOMOLOGICA SINICA  2017, Vol. 60 Issue (7): 742-749    DOI: 10.16380/j.kcxb.2017.07.002
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Expression profiles of the cytochrome P450 gene LmCYP6FD3 in Locusta migratoria (Orthoptera: Acrididae) and its role in insecticide detoxification
ZHU Wen-Ya1,2,3,4, WU Hai-Hua1,2,4, ZHANG Xue-Yao1,2,4, LIU Jiao1,2,4, ZHANG Jian-Zhen1,2,4,*, MA En-Bo1,2,4,*
(1. Institute of Applied Biology, Shanxi University, Taiyuan 030006, China; 2. College of Life Science, Shanxi University, Taiyuan 030006, China; 3. Institute of Plant Protection, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China; 4. Key Laboratory of Integrated Pest Management in Agriculture, Taiyuan 030031, China)
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Abstract 【Aim】 To study the molecular characterization and biological function of the cytochrome P450 gene LmCYP6FD3 from the migratory locust, Locusta migratoria. 【Methods】 The cytochrome P450 gene sequences were searched from the transcriptome database of L. migratoria, the cDNA fragment of the target gene was cloned using RT-PCR, and its expression patterns in various tissues (gastric caeca, foregut, midgut, hindgut, integument, testis, ovary, muscles, hemolymph, fat body and Malpighian tubules) of the 5th instar nymphs and different developmental stages (egg, 1st-5th instar nymph and adult) were analyzed using real-time quantitative PCR (RT-qPCR). The target gene was silenced by RNA interference (RNAi), the silence efficiency was evaluated by injecting dsRNA to the 2nd instar nymphs, and the susceptibility of the nymphs to three insecticides (malathion, carbaryl and deltamethrin) was assessed. 【Results】 The full-length cDNA of cytochrome P450 gene was cloned (GenBank accession no.: KT316378) and named LmCYP6FD3. Its length is 1 563 bp, encoding 521 amino acids. The expression level of LmCYP6FD3 was the highest in the Malpighian tubules of the 5th instar nymphs, moderate in the hindgut and fat body, and lower in other tissues. LmCYP6FD3 was expressed during the whole developmental period and had relatively higher expression level in the nymphal stage. Insecticide bioassay in combination with RNAi showed that the highest silence efficiency of LmCYP6FD3 was achieved at 24 h after RNAi, and the mortality of the 2nd instar nymphs of L. migratoria in the RNAi treatment group (injection with dsLmCYP6FD3) increased by 32% as compared with that of the control group (injection with dsGFP) after exposure to carbaryl by dipping method. 【Conclusion】 In this study, the full-length of cDNA sequence of LmCYP6FD3 was cloned. This gene has the highest expression level in the Malpighian tubules of L. migratoria and might play a significant role in the detoxification of carbaryl in this locust.
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ZHU Wen-Ya
WU Hai-Hua
ZHANG Xue-Yao
LIU Jiao
ZHANG Jian-Zhen
MA 恩Bo
Key wordsCytochrome P450   Locusta migratoria   gene expression   RNA interference   insecticide     
Cite this article:   
ZHU Wen-Ya,WU Hai-Hua,ZHANG Xue-Yao et al. Expression profiles of the cytochrome P450 gene LmCYP6FD3 in Locusta migratoria (Orthoptera: Acrididae) and its role in insecticide detoxification[J]. ACTA ENTOMOLOGICA SINICA, 2017, 60(7): 742-749.
URL:  
http://www.insect.org.cn/EN/10.16380/j.kcxb.2017.07.002      or     http://www.insect.org.cn/EN/Y2017/V60/I7/742
 
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