Amplification of a cytochrome P450 gene is associated with resistance to neonicotinoid insecticides in the aphid Myzus persicae

A - Papers appearing in refereed journals

Puinean, A. M., Foster, S. P., Oliphant, L., Denholm, I., Field, L. M., Millar, N. S., Williamson, M. S. and Bass, C. 2010. Amplification of a cytochrome P450 gene is associated with resistance to neonicotinoid insecticides in the aphid Myzus persicae. PLOS Genetics. 6, p. e1000999 (11pp).

AuthorsPuinean, A. M., Foster, S. P., Oliphant, L., Denholm, I., Field, L. M., Millar, N. S., Williamson, M. S. and Bass, C.
Abstract

The aphid Myzus persicae is a globally significant crop pest that has evolved high levels of resistance to almost all classes of insecticide. To date, the neonicotinoids, an economically important class of insecticides that target nicotinic acetylcholine receptors (nAChRs), have remained an effective control measure; however, recent reports of resistance in M. persicae represent a threat to the long-term efficacy of this chemical class. In this study, the mechanisms underlying resistance to the neonicotinoid insecticides were investigated using biological, biochemical, and genomic approaches. Bioassays on a resistant M. persicae clone (5191A) suggested that P450-mediated detoxification plays a primary role in resistance, although additional mechanism(s) may also contribute. Microarray analysis, using an array populated with probes corresponding to all known detoxification genes in M. persicae, revealed constitutive over-expression (22-fold) of a single P450 gene (CYP6CY3); and quantitative PCR showed that the over-expression is due, at least in part, to gene amplification. This is the first report of a P450 gene amplification event associated with insecticide resistance in an agriculturally important insect pest. The microarray analysis also showed over-expression of several gene sequences that encode cuticular proteins (2–16-fold), and artificial feeding assays and in vivo penetration assays using radiolabeled insecticide provided direct evidence of a role for reduced cuticular penetration in neonicotinoid resistance. Conversely, receptor radioligand binding studies and nucleotide sequencing of nAChR subunit genes suggest that target-site changes are unlikely to contribute to resistance to neonicotinoid insecticides in M. persicae.

Year of Publication2010
JournalPLOS Genetics
Journal citation6, p. e1000999 (11pp)
Digital Object Identifier (DOI)doi:10.1371/journal.pgen.1000999
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeCentre for Sustainable Pest and Disease Management (PDM)
BBSRC Institute Career Path Fellowship: A genomic approach to understanding insecticide resistance in crop pests
Investigating resistance to neonicotinoid insecticides in insect pests
A genomic approach to understanding insecticide resistance in crop pests
Publisher's version
Output statusPublished
Publication dates
Online24 Jun 2010
Publication process dates
Accepted24 May 2010
PublisherPublic Library of Science (PLOS)
ISSN1553-7404

Permalink - https://repository.rothamsted.ac.uk/item/8q62v/amplification-of-a-cytochrome-p450-gene-is-associated-with-resistance-to-neonicotinoid-insecticides-in-the-aphid-myzus-persicae

29 total views
4 total downloads
0 views this month
0 downloads this month
Download files as zip