Unknown,Transcriptomics,Genomics,Proteomics

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Cyflumetofen resistance in the two-spotted spider mite Tetranychus urticae

ABSTRACT: Cyflumetofen is a novel acaricide on the international market with an unknown mode of action. Under laboratory conditions, we selected for high levels of cyflumetofen resistance in a susceptible mite strain and performed genome-wide gene-expression analysis. Differential expression between the resistant and susceptible strain was identified to study on the molecular level how mites develop resistance to this novel acaricide. Our results show that in T. urticae, the selection for cyflumetofen resistance resulted in a differential expression in only a limited number of genes. This transcriptomic study provides an unbiased look how cyflumetofen resistance triggers selection on the transcriptional level in T. urticae. 4 replicates for one comparison; per replicate 150 mites were pooled. Mites of the derived cyflumetofen resistant spider mite (cy5-labelled) were directly compared to mites of the ancestral susceptible strain (cy3-labelled).

ORGANISM(S): Tetranychus urticae

SUBMITTER: Nicky Wybouw

PROVIDER: E-GEOD-62916 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:While pathogen-induced immunity is comparatively well characterized, far less is known about plant defense responses to arthropod herbivores. To date, most molecular-genetic studies of plant-arthropod interactions have focused on insects. However, plant-feeding (phytophagous) mites are also pests of diverse plants, and mites induce different patterns of damage to plant tissues than do well-studied insects (e.g., Lepidopteran larvae or aphids). The two-spotted spider mite, Tetranychus urticae, is among the most significant mite pests in agriculture. T. urticae is an extreme generalist that has been documented on a staggering number of plant hosts (more than 1,100), and is renowned for the rapid evolution of pesticide resistance. To understand reciprocal interactions between T. urticae and a plant host at the molecular level, we examined mite herbivory using Arabidopsis thaliana. Despite differences in feeding guilds, we found that transcriptional responses of A. thaliana to mite herbivory generally resembled those observed for insect herbivores. In particular, defense to mites was mediated by jasmonic acid (JA) biosynthesis and signaling. Further, indole glucosinolates dramatically increased mite mortality and development times. Variation in both basal and activated levels of these defense pathways might also explain differences in mite damage and feeding success between A. thaliana accessions. On the herbivore side, a diverse set of genes associated with detoxification of xenobiotics was induced upon exposure to increasing levels of in planta indole glucosinolates. Our findings provide molecular insights into the nature of, and response to, herbivory for a representative of a major class of arthropod herbivores. We used microarray to assess global gene expresion in Arabidopsis thaliana upon Tetranychus urticae attack in two A. thaliana accessions: Bla-2, resistant to spider mite herbivory and Kon, susceptible to spider mite herbivory. 3 week old Arabidopsis thaliana plants were subjected to Tetranychus urticae attack through application of 10 mites for various periods of time (timecourse scenario) or hundreds of mites for 1 hour (feeding site scenario).

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Cyflumetofen resistance in the two-spotted spider mite Tetranychus urticae

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