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MiR-2b-3p Downregulated PxTrypsin-9 Expression in the Larval Midgut to Decrease Cry1Ac Susceptibility of the Diamondback Moth, Plutella xylostella (L.).
- Source :
-
Journal of agricultural and food chemistry [J Agric Food Chem] 2024 Jan 31; Vol. 72 (4), pp. 2263-2276. Date of Electronic Publication: 2024 Jan 18. - Publication Year :
- 2024
-
Abstract
- Crystal (Cry) toxins, produced by Bacillus thuringiensis , are widely used as effective biological pesticides in agricultural production. However, insects always quickly evolve adaptations against Cry toxins within a few generations. In this study, we focused on the Cry1Ac protoxin activated by protease. Our results identified PxTrypsin-9 as a trypsin gene that plays a key role in Cry1Ac virulence in Plutella xylostella larvae. In addition, P. xylostella miR-2b-3p, a member of the micoRNA-2 (miR-2) family, was significantly upregulated by Cry1Ac protoxin and targeted to PxTrypsin-9 downregulated its expression. The mRNA level of PxTrypsin-9, regulated by miR-2b-3p, revealed an increased tolerance of P. xylostella larvae to Cry1Ac at the post-transcriptional level. Considering that miR-2b and trypsin genes are widely distributed in various pest species, our study provides the basis for further investigation of the roles of miRNAs in the regulation of the resistance to Cry1Ac and other insecticides.
- Subjects :
- Animals
Larva genetics
Larva metabolism
Trypsin genetics
Trypsin metabolism
Endotoxins genetics
Endotoxins pharmacology
Endotoxins metabolism
Hemolysin Proteins genetics
Hemolysin Proteins pharmacology
Hemolysin Proteins metabolism
Bacterial Proteins genetics
Bacterial Proteins metabolism
Insecticide Resistance genetics
Moths genetics
Moths metabolism
Insecticides pharmacology
Insecticides metabolism
Bacillus thuringiensis chemistry
MicroRNAs genetics
MicroRNAs metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1520-5118
- Volume :
- 72
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Journal of agricultural and food chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 38235648
- Full Text :
- https://doi.org/10.1021/acs.jafc.3c07678