|Tomato yellow leaf curl virus differentially influences plant defense responses to a vector and a no|
Qi Su,Mark C. Mescher,Shaoli Wang,Gong Chen,Wen Xie,Qingjun Wu,Wenkai Wang,Youjun Zhang
Accepted manuscript online: 5 October 2015 Full publication history
This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/pce.12650.
Plants frequently engage in simultaneous interactions with diverse classes of biotic antagonists. Differential induction of plant defense pathways by these antagonists, and interactions between pathways, can have important ecological implications; however, these effects are currently not well understood. We explored how Tomato yellow leaf curl virus (TYLCV) influenced the performance of its vector (Bemisia tabaci) and a non-vector herbivore (Tetranychus urticae) occurring separately or together on tomato plants (Solanum lycopersicum). TYLCV enhanced the performance of B. tabaci, though this effect was statistically significant only in the absence of T. urticae, which adversely affected B. tabaci performance regardless of infection status. In contrast, the performance of T. urticae was enhanced (only) by the combined presence of TYLCV and B. tabaci. Analyses of phytohormone levels and defense gene expression in wild-type tomatoes and various plant-defense mutants indicate that the enhancement of herbivore performance (for each species) entails the disruption of downstream defenses in the jasmonic acid (JA) pathway. For T. urticae, this disruption appears to involve antagonistic effects of salicylic acid (SA), which is cumulatively induced to high levels by B. tabaci and TYLCV. In contrast, TYLCV was found to suppress JA-mediated responses to B. tabaci via mechanisms independent of SA. This article is protected by copyright. All rights reserved.
由我所张友军研究员领衔的蔬菜虫害防控创新团队利用生物学、生态学和分子生物学方法并结合突变体材料的应用，发现植物诱导产生的防御途径可通过相互间的“通话”调控不同有害生物种群的暴发。相关研究结果“Tomato yellow leaf curl virus differentially influences plant defense responses to a vector and a non-vector herbivore”（番茄黄化曲叶病毒与载体和非载体昆虫的组合影响寄主植物防御反应并进而影响有害生物） 于近日在线发表在国际著名期刊《Plant Cell & Environment》(《植物细胞与环境》)上。
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