Plant neighbor detection and allelochemical response are driven by root-secreted signaling chemicals

Chui-Hua Kong (), Song-Zhu Zhang, Yong-Hua Li, Zhi-Chao Xia, Xue-Fang Yang, Scott J. Meiners and Peng Wang
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Chui-Hua Kong: China Agricultural University
Song-Zhu Zhang: China Agricultural University
Yong-Hua Li: China Agricultural University
Zhi-Chao Xia: China Agricultural University
Xue-Fang Yang: China Agricultural University
Scott J. Meiners: Eastern Illinois University
Peng Wang: Chinese Academy of Sciences

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract 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.

Date: 2018
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DOI: 10.1038/s41467-018-06429-1

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