The adipokinetic hormone signaling system regulates the sensitivity of Bactrocera dorsalis to malathion.

The neuropeptide adipokinetic hormone (AKH) binds to the AKH receptor (AKHR) to regulate carbohydrate and lipid metabolism. It also participates in the insect anti-stress response. We used RT-qPCR to detect the expression levels of 39 neuropeptides in malathion-susceptible (MS) and malathion-resistant (MR) strains of Bactrocera dorsalis. AKH and AKHR were highly expressed in the MR strain. Using a malathion bioassay and RNA interference (RNAi), we demonstrated that AKHR is involved in the susceptibility of B. dorsalis to malathion. We found significantly reduced expression of two detoxification enzyme genes (glutathione-S-transferase, GST and α-esterase, CarE) after AKHR RNAi. Based on our previous data, GSTd10 and CarE6 participate the direct metabolism of malathion in this fly, which is also verified by a malathion metabolism assay by HPLC using the crude enzymes in the current study. These results suggest that AKHR plays an important role in affecting malathion susceptibility via detoxification enzyme genes. Copyright © 2021 Elsevier Inc. All rights reserved.

Citation

Yang Yang, Ying Xiong, Hong-Fei Li, Huai-Jia Zhao, Guang-Hui Tang, Li-Wei Meng, Jin-Jun Wang, Hong-Bo Jiang. The adipokinetic hormone signaling system regulates the sensitivity of Bactrocera dorsalis to malathion. Pesticide biochemistry and physiology. 2021 May;174:104808

Mesh Tags

Substances

PMID: 33838709

search → result