SGER: Eavesdropping Between Plants

德布-0121050-卡班在过去的二十年里，生态学家们逐渐认识到间接影响在许多社区是广泛和重要的。诱导抗性是一种已经得到大量研究的间接效应，尽管生态学家对植物与植物之间的交流作为诱导抗性的机制持非常怀疑的态度。事实上，大多数生态学家对植物之间交流的可能性不屑一顾，因为早期关于这种现象的报道并不令人信服。然而，我最近的田野调查表明，野生烟草植物“窃听”被修剪的鼠尾草邻居，并诱导对它们共享的草食动物的更高水平的抵抗。这种交流似乎是由山艾树释放的空中信号传递的，可能是茉莉酸甲酯。这项提议提出了两个问题：1)窃听有多普遍？2)茉莉酸甲酯是空中信号吗？如果窃听被证明是普遍存在的，那么植物群落内的相互作用可能比我们现在所理解的要丰富得多。广泛的窃听表明，联合阻力和敏感度以及总体空间结构的作用要大得多。

DEB-0121050 - KarbanOver the past two decades ecologists have come to recognize that indirect effects are widespread and important in many communities. Induced resistance represents one type of indirect effect that has received a lot of study, although ecologists are very skeptical about plant-plant communication as a mechanism for induced resistance. In fact, most ecologists discount the possibility of communication between plants because early reports of this phenomenon were not convincing. However, my recent fieldwork suggests that wild tobacco plants "eavesdrop" on clipped sagebrush neighbors and induce higher levels of resistance to their shared herbivores. This communication appears to be mediated by an airborne cue released by sagebrush, perhaps methyl jasmonate. This proposal asks two questions: 1) How general is eavesdropping? 2) Is methyl jasmonate the airborne cue? If eavesdropping proves to be widespread then the spectrum of interactions within plant communities may be much richer than we now appreciate. Widespread eavesdropping suggests a much greater role for associational resistance and susceptibility, and for spatial structure in general.