Article (Scientific journals)
Gene Silencing of laccase 1 Induced by Double-Stranded RNA in Callosobruchus maculatus (Fabricius 1775) (Coleoptera: Chrysomelidae) Suggests RNAi as a Potential New Biotechnological Tool for Bruchid’s Control
Segers, Arnaud; Carpentier, Joachim; Francis, Frédéric et al.
2023In Agriculture (Basel, Switzerland), 13 (2), p. 412
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Keywords :
argonaute; Bruchidae; Bruchinae; dicer; reference gene; RISC; RNA interference; RNAi; RT-qPCR; Food Science; Agronomy and Crop Science; Plant Science
Abstract :
[en] Bruchids are the most important pests of leguminous seeds in the world. In this study, the focus was done on Callosobruchus maculatus, a serious pest of Vigna unguiculata seeds. As no efficient control methods preventing collateral effects on beneficials currently exist, this study investigated whether RNA interference (RNAi) could provide a new biotechnological and selective tool for bruchids control. Three principal objectives were followed including (i) the identification of all RNAi machinery core components and a key protein to silence in C. maculatus genome (c.f., dicer-2, argonaute-2, R2D2, and laccase 1), (ii) the identification of suitable reference gene for RT-qPCR analyses, and (iii) the micro-injection of dsRNA coding for laccase 1 to adults of C. maculatus to assess gene expression levels by RT-qPCR and potentially related mortalities. Phylogenetical analyses performed from transcriptomic information successfully identified all necessary proteins in the RNAi mechanism and also the open reading frame of laccase 1 in C. maculatus. A new reference gene was identified (i.e., alpha-tubuline 1) and coupled with glutiathone S transferase for RT-qPCR analyses. Double-stranded RNAs coding for laccase 1 and green fluorescent protein (control) were produced and 400 ng of each dsRNA were micro-injected into C. maculatus adults. RT-qPCR analyses revealed a stable significant decrease in laccase 1 expression in about 80% of adults treated with laccase 1 dsRNA after three days post-injection. No significant mortalities were observed which is probably related to the non-exposure of adults to anti-nutritional factors that are usually regulated by laccase. Further research should focus either on the feeding larval stage which is directly exposed to anti-nutritional factors, or on other target genes to induce dead phenotypes. This study is the first gene silencing report on a bruchid species and supports RNAi as a potential future method of control.
Disciplines :
Agriculture & agronomy
Entomology & pest control
Biotechnology
Author, co-author :
Segers, Arnaud  ;  Université de Liège - ULiège > Département GxABT > Gestion durable des bio-agresseurs
Carpentier, Joachim ;  Université de Liège - ULiège > TERRA Research Centre
Francis, Frédéric  ;  Université de Liège - ULiège > TERRA Research Centre > Gestion durable des bio-agresseurs
Caparros Megido, Rudy  ;  Université de Liège - ULiège > TERRA Research Centre > Gestion durable des bio-agresseurs
Language :
English
Title :
Gene Silencing of laccase 1 Induced by Double-Stranded RNA in Callosobruchus maculatus (Fabricius 1775) (Coleoptera: Chrysomelidae) Suggests RNAi as a Potential New Biotechnological Tool for Bruchid’s Control
Publication date :
February 2023
Journal title :
Agriculture (Basel, Switzerland)
ISSN :
2077-0472
eISSN :
2077-0472
Publisher :
MDPI
Volume :
13
Issue :
2
Pages :
412
Peer reviewed :
Peer reviewed
Name of the research project :
FEVERPRO
Funders :
SPW Agriculture, Ressources naturelles et Environnement - Service Public de Wallonie. Agriculture, Ressources naturelles et Environnement [BE]
Funding number :
D31-1395
Funding text :
This research was funded by Service Public de Wallonie Agriculture. grant number D31-1395.
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