GSE116827 Comparative transcriptomics of tomato plants simultaneously infested with different species of herbivorous mites reveals distinct signatures of host defense suppression

Contributors : B C Schimmel ; J M Alba ; J J Glas ; N Wybouw ; T T Meijer ; R C Schuurink ; M R KantSeries Type : Expression profiling by arrayOrganism : Solanum lycopersicumTomato plants are commonly attacked by herbivorous mites, including by generalist Tetranychus urticae and specialists Tetranychus evansi and Aculops lycopersici. Mite feeding induces plant defense responses that reduce mite performance. However, via poorly understood mechanisms, T. evansi and A. lycopersici suppress plant defenses and, consequently, maintain a high performance on tomato. Accordingly, on a shared host, non-adapted T. urticae can be facilitated by either of the specialist mites, likely via the suppression of plant defenses. To better understand defense suppression and indirect plant-mediated interactions between herbivorous mites, we used microarrays to analyze transcriptomic changes in tomato after attack by either a single mite species (T. urticae, T. evansi, A. lycopersici) or two species simultaneously (T. urticae plus T. evansi or T. urticae plus A. lycopersici). Additionally, we assessed mite-induced changes in defense-associated phytohormones using LC-MS/MS. Compared to non-infested controls, jasmonates (JAs) and salicylate (SA) accumulated to higher amounts upon all mite-infestation treatments, but lowest increases were detected after single infestations with defense-suppressors. Strikingly, whereas 8 to 10% of tomato genes was differentially expressed upon single infestations with...

Source: GEO: Gene Expression Omnibus - November 20, 2018 Category: Genetics & Stem Cells Tags: Expression profiling by array Solanum lycopersicum Source Type: research