Complex consequences of herbivory and interplant cues in three annual plants

Information exchange (or signaling) between plants following herbivore damage has recently been shown to affect plant responses to herbivory in relatively simple natural systems. In a large, manipulative field study using three annual plant species (Achyrachaena mollis, Lupinus nanus, and Sinapis arvensis), we tested whether experimental damage to a neighboring conspecific affected a plant's lifetime fitness and interactions with herbivores. By manipulating relatedness between plants, we assessed whether genetic relatedness of neighboring individuals influenced the outcome of having a damaged neighbor. Additionally, in laboratory feeding assays, we assessed whether damage to a neighboring plant specifically affected palatability to a generalist herbivore and, for S. arvensis, a specialist herbivore. Our study suggested a high level of contingency in the outcomes of plant signaling. For example, in the field, damaging a neighbor resulted in greater herbivory to A. mollis, but only when t...植食性昆虫取食损伤后，植物间的信息交流（或称信号传导）在相对简易的自然系统中，已被证实可调控植物对植食作用的响应。本研究依托一项针对三种一年生植物（柔弱鳞叶菊*Achyrachaena mollis*、蓝花羽扇豆*Lupinus nanus*及野芥*Sinapis arvensis*）的大型操控性野外实验，旨在探究邻近同种个体的实验性损伤是否会影响目标植物的终生适合度及其与植食性昆虫的互作关系。研究通过操控植物间的亲缘关系，评估了邻近植株的遗传亲缘度是否会调控受损邻株所引发的互作结果。此外，本研究还开展了室内取食实验，以检测邻株损伤是否会特异性改变目标植物对广食性植食性昆虫的适口性；针对野芥*S. arvensis*，本研究同时探究了其对专食性植食性昆虫的适口性变化。本研究表明，植物信号传导的互作结果存在高度的情境依赖性。例如在野外实验中，损伤邻株会提升柔弱鳞叶菊*A. mollis*的植食取食程度，但仅当……