中文摘要：植物经常会同时与不同种类生物拮抗剂互作。被这些拮抗剂诱导分化的植物防御路径以及各路径之间的互作可能具有重要的生态学意义，但目前这些影响不得而知。本文研究了番茄黄化曲叶病毒（TYLCV）如何对单独或同时出现在番茄上的介体昆虫（烟粉虱）和非介体昆虫（二斑叶螨）性能产生影响。研究结果显示，TYLCV提高了烟粉虱的性能，但这种影响只会在没有二斑叶螨出现的时候比较明显（二斑叶螨会对烟粉虱的性能造成不利影响）。相比较而言，二斑叶螨的性能只有在TYLCV和烟粉虱共同存在时才会得到提高。
外文摘要：Plants frequently engage in simultaneous interactions with diverse classes of biotic antagonists. Differential induction of plant defence 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, although 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 defence gene expression in wild-type tomatoes and various plant-defence mutants indicate that the enhancement of herbivore performance (for each species) entails the disruption of downstream defences 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.
外文关键词：Bemisia tabaci；community ecology；defence suppression；induced plant defence；plant-mediated indirect interactions；Tetranychus urticae;；Tomato yellow leaf curl virus；virus-plant-herbivore interactions
作者：Su, Qi；Mescher, Mark C.；Wang, Shaoli；等
作者单位：中国农业科学院
期刊名称：PLANT CELL AND ENVIRONMENT
期刊影响因子：6.169
出版年份：2016
出版刊次：3
点击下载：番茄黄化曲叶病毒不同程度地影响了植物对介体及非介体昆虫的防御反应