Facilitation and inhibition: changes in plant nitrogen and secondary metabolites mediate interactions between above-ground and below-ground herbivores
Facilitation and inhibition: changes in plant nitrogen and secondary metabolites mediate interactions between above-ground and below-ground herbivores
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促进和抑制：植物氮和次生代谢物的变化介导地上和地下食草动物之间的相互作用
DOI：
10.1098/rspb.2013.1318
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发表时间：
2013-09-22
影响因子：
4.7
通讯作者：
Ding, Jianqing
中科院分区：
文献类型：
--
作者：
Huang, Wei;Siemann, Evan;Ding, Jianqing
迄今为止，尚不清楚食草动物引起的植物初级和次生代谢物的变化如何影响地上和地下食草动物的相互作用。在这里，我们报告了 Bikasha colonis 的地上（成虫）和地下（幼虫）取食对 Triadica sebifera 芽和根中氮和次级化学物质的影响，以解释地上和地下昆虫的相互相互作用。植物通过地下食草增加了根单宁，但地上食草阻止了这种增加，幼虫存活率加倍。地上食草动物提高了根氮，可能有助于增加幼虫的存活率。然而，植物通过地上食草增加叶单宁，而地下食草则放大了这种增加，成虫存活率下降。随着叶单宁或根单宁的增加，叶黄酮类化合物减少，这表明这些化学物质之间存在权衡。总之，这些结果表明，植物化学物质介导同种幼虫和成虫的对比效应，而昆虫可能利用植物反应来促进其后代的表现，这可能会影响种群动态。
To date, it remains unclear how herbivore-induced changes in plant primary and secondary metabolites impact above-ground and below-ground herbivore interactions. Here, we report effects of above-ground (adult) and below-ground (larval) feeding by Bikasha collaris on nitrogen and secondary chemicals in shoots and roots of Triadica sebifera to explain reciprocal above-ground and below-ground insect interactions. Plants increased root tannins with below-ground herbivory, but above-ground herbivory prevented this increase and larval survival doubled. Above-ground herbivory elevated root nitrogen, probably contributing to increased larval survival. However, plants increased foliar tannins with above-ground herbivory and below-ground herbivory amplified this increase, and adult survival decreased. As either foliar or root tannins increased, foliar flavonoids decreased, suggesting a trade-off between these chemicals. Together, these results show that plant chemicals mediate contrasting effects of conspecific larval and adult insects, whereas insects may take advantage of plant responses to facilitate their offspring performance, which may influence population dynamics.