Wild relatives of tomato possess effective means to deal with several pests, among which are a variety of insects. Here we studied the presence of resistance components against Trialeurodes vaporariorum, Myzus persicae, Frankliniella occidentalis, and Spodoptera exigua in the Lycopersicon group of Solanum section Lycopersicon by means of bioassays and comprehensive metabolite profiling. Broad spectrum resistance was found in Solanum galapagense and a few accessions of S. pimpinellifolium. Resistance to the sap sucking insects may be based on the same mechanism, but different from the caterpillar resistance. Large and highly significant differences in the leaf metabolomes were found between S. galapagense, containing type IV trichomes, and its closest relative S. cheesmaniae, which lacks type IV trichomes. The most evident differences were the relatively high levels of different methylated forms of the flavonoid myricetin and many acyl sucrose structures in S. galapagense. Possible candidate genes regulating the production of these compounds were identified in the Wf-1 QTL region of S. galapagense, which was previously shown to confer resistance to the whitefly B. tabaci. The broad spectrum insect resistance identified in S. galapagense will be very useful to increase resistance in cultivated tomato.

中文翻译：

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栽培番茄近亲的广谱抗虫性和代谢物

番茄的野生近缘种具有对付多种害虫的有效手段，其中包括多种昆虫。在这里，我们通过生物测定和综合代谢物分析研究了茄属番茄部分的番茄组中对汽绿粉虱、桃蚜、富兰克林和甜菜夜蛾的抗性成分的存在。在 Solanum galapagense 和 S. pimpinellifolium 的一些种质中发现了广谱抗性。对吸液昆虫的抗性可能基于相同的机制，但与毛虫抗性不同。在含有 IV 型毛状体的 S. galapagense 与其最亲缘的 S. cheesmaniae（缺少 IV 型毛状体）之间发现了叶片代谢组的巨大且非常显着的差异。最明显的差异是黄酮类杨梅素的不同甲基化形式的相对较高水平和 S. galapagense 中的许多酰基蔗糖结构。在 S. galapagense 的 Wf-1 QTL 区域中鉴定了可能调节这些化合物产生的候选基因，该区域先前被证明赋予对粉虱 B. tabaci 的抗性。在 S. galapagense 中鉴定的广谱昆虫抗性对于增加栽培番茄的抗性非常有用。