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Spirodiclofen resistance in the spider mite Tetranychus urticae

ABSTRACT: The goal of our microarray experiments was to compare the gene expression profile of two spirodiclofen resistant spider mite strains (SR-VP and SR-TK) with that of a susceptible spider mite strain (LS-VL)

ORGANISM(S): Tetranychus urticae

PROVIDER: GSE43538 | GEO | 2013/06/26

SECONDARY ACCESSION(S): PRJNA186677

REPOSITORIES: GEO

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Spirodiclofen resistance in the spider mite Tetranychus urticae

Project description:The goal of our microarray experiments was to compare the gene expression profile of two spirodiclofen resistant spider mite strains (SR-VP and SR-TK) with that of a susceptible spider mite strain (LS-VL) 5 samples were analyzed: 3 biological replicates for SR-VP, 2 biological replicates for SR-TK

2013-06-26 | E-GEOD-43538 | biostudies-arrayexpress

A link between host plant adaptation and pesticide resistance in the polyphagous spider mite Tetranychus urticae

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Cyenopyrafen resistance in the two-spotted spider mite Tetranychus urticae

Project description:Cyenopyrafen is a novel acaricide with a currently unknown mode of action. We selected for high levels of cyenopyrafen resistance in a susceptible spider mite strain and previously published patterns of cross-resistance to other well-described acaricides (Khalighi et al., 2014). In addition, we also included an independent cyenopyrafen-susceptible mite strain (referred to as Akita) in this study. We performed transcriptomic analysis to identify on the molecular level how T. urticae develops resistance to this novel acaricide. Using this dataset, we show that the selection for cyenopyrafen resistance resulted in massive transcriptomic responses in T. urticae. The multi-gene family of cytochrome P450 monooxygenases (CYPs) exhibited a drastic differential expression with a significant transcriptional induction in the acaricide resistant strain. This transcriptomic study highlights the potential importance of CYPs in mite resistance to the cyenopyrafen acaricide.

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Tetranychus urticae secretome - The Salivary Protein Repertoire of the Polyphagous Spider Mite Tetranychus urticae: A Quest for Effectors

Project description:The two-spotted spider mite Tetranychus urticae is an extreme polyphaguous crop pest. Next to an increased detoxification potential of plant secondary metabolites, it has recently been shown that spider mites manipulate plant defences. Salivary constituents are proposed to play an important role during the interaction with its many hosts. The proteomic composition of saliva delivered into artificial diet by spider mites adapted to various hosts - bean, soy, maize, tomato -was determined using Orbitrap mass spectrometry. Over 200 different proteins were identified, many of unknown function and in numerous cases belonging to multi-membered gene families. A selection of these putative salivary proteins was validated using whole-mount in situ hybridizations and expression was shown to be localized in the anterior and dorsal podocephalic glands of the spider mite. Host-plant dependent expression was evident from the proteomics dataset and was further studied in detail by micro-array based genome wide gene expression profiling of mites maintained on the host plants under study. Previously obtained gene-expression datasets were further used to get more insight in the expression profile over different life stages and physiological states. To conclude, for the first time the T. urticae salivary proteome repertoire was characterized using a custom feeding hemisphere-based enrichment technique. This knowledge will assist in unraveling the molecular interactions between phytophagous mites and their host plants. This may ultimately facilitate the development of mite-resistant crops.

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Developmental stage-specific gene expression in the two-spotted spider mite (Tetranychus urticae)

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Project description:We generated 38-bp Illumina reads from single messenger RNA libraries from three diverse developmental stages of the two-spotted spider mite to capture small RNA diversity across development. Adult, nymphal+larvae and embryonic stages were separated using sieves of various pore sizes, and mites of various developmental stages were carefully selected for small RNA library preparation. Samples were a mix of males and females to capture male and female patterns of small RNA composition and were reared on beans (Phaseolus vulgaris cv California Red Kidney). Small RNA reads were used for miRNA prediction, piRNA discovery, and for quantitation of small RNA-generating loci (i.e. expression across development). Examination of small RNA from spider mites of adult, embryonic and pooled larval/nymphal developmental stages.

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