Ecological trade-offs between jasmonic acid-dependent direct and indirect plant defences in tritrophic interactions.
Ecological trade-offs between jasmonic acid-dependent direct and indirect plant defences in tritrophic interactions.
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三营养相互作用中茉莉酸依赖性直接和间接植物防御之间的生态权衡
DOI：
10.1111/j.1469-8137.2010.03491.x
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发表时间：
2011-01
期刊：
影响因子：
--
通讯作者：
Kang L
中科院分区：
文献类型：
--
作者：
Wei J;Wang L;Zhao J;Li C;Ge F;Kang L
最近对植物茉莉酸（jasmonic acid， JA）信号的转基因研究支持了茉莉酸家族氧脂素在介导植物直接和间接防御中起重要作用的假设。然而，在营养系统中两种防御模式的相互作用在很大程度上是未知的。在这项研究中，我们研究了草食性叶螨（Liriomyza huidobrensis）及其寄生蜂（Opius dissitus）对三种番茄基因型的偏好和表现：野生型（WT）植株、JA生物合成（spr2）突变体和JA过表达35S::prosys植株。以其蛋白酶抑制剂产量和挥发物释放量作为直接和间接防御因子，评价了采叶螨和拟寄生蜂的反应。在这里，我们表明，尽管spr2突变体植物在直接防御幼虫叶虫和吸引拟寄生物方面受到损害，但与WT植物相比，它们对成年蝇的吸引力较低。此外，与其他基因型相比，35S::prosys植株表现出更强的直接和间接防御能力，但被寄生蜂寄生的成功率较低。综上所述，这些结果表明转基因植物在依赖ja的直接防御和间接防御之间存在明显的生态权衡，其适应性应在营养系统和自然条件下进行评估。
Recent studies on plants genetically modified in jasmonic acid (JA) signalling support the hypothesis that the jasmonate family of oxylipins plays an important role in mediating direct and indirect plant defences. However, the interaction of two modes of defence in tritrophic systems is largely unknown. In this study, we examined the preference and performance of a herbivorous leafminer (Liriomyza huidobrensis) and its parasitic wasp (Opius dissitus) on three tomato genotypes: a wild-type (WT) plant, a JA biosynthesis (spr2) mutant, and a JA-overexpression 35S::prosys plant. Their proteinase inhibitor production and volatile emission were used as direct and indirect defence factors to evaluate the responses of leafminers and parasitoids. Here, we show that although spr2 mutant plants are compromised in direct defence against the larval leafminers and in attracting parasitoids, they are less attractive to adult flies compared with WT plants. Moreover, in comparison to other genotypes, the 35S::prosys plant displays greater direct and constitutive indirect defences, but reduced success of parasitism by parasitoids. Taken together, these results suggest that there are distinguished ecological trade-offs between JA-dependent direct and indirect defences in genetically modified plants whose fitness should be assessed in tritrophic systems and under natural conditions.
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