Plant neighbor detection and response strategies are important mediators of interactions among species. Despite increasing knowledge of neighbor detection and response involving plant volatiles, less is known about how soil-borne signaling chemicals may act belowground in plant-plant interactions. Here, we experimentally demonstrate neighbor detection and allelopathic responses between wheat and 100 other plant species via belowground signaling. Wheat can detect both conspecific and heterospecific neighbors and responds by increasing allelochemical production. Furthermore, we show that (-)-loliolide and jasmonic acid are present in root exudates from a diverse range of species and are able to trigger allelochemical production in wheat. These findings suggest that root-secreted (-)-loliolide and jasmonic acid are involved in plant neighbor detection and allelochemical response and may be widespread mediators of belowground plant-plant interactions.

中文翻译：

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植物邻居的检测和化感反应是由根分泌的信号化学物质驱动的。

植物邻居的检测和响应策略是物种之间相互作用的重要介体。尽管对涉及植物挥发物的邻居检测和反应的了解不断增加，但对于土壤中的信号化学物质如何在植物与植物之间的相互作用中发挥作用的了解较少。在这里，我们通过地下信号实验证明了小麦和100种其他植物之间的邻居检测和化感反应。小麦可以检测到同种和异种邻居，并通过增加化感物质的产量做出反应。此外，我们显示（-）-氟碘化物和茉莉酸存在于来自各种物种的根系分泌物中，并且能够触发小麦中的化感物质生产。