Atractylodes lancea volatiles induce physiological responses in neighboring peanut plant during intercropping
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Atractylodes lancea volatiles induce physiological responses in neighboring peanut plant during intercropping Xiaogang Li & Zhen Yang & Ya’nan Zhang & Li Yu & Changfeng Ding & Yangwenke Liao & Chuanchao Dai & Xingxiang Wang
Received: 13 November 2019 / Accepted: 17 June 2020 # Springer Nature Switzerland AG 2020
Abstract Aims Plant volatiles serve as airborne semiochemicals, bridging the interactions between the plant and environment. Intercropping of a Chinese medicinal herb, Atractylodes lancea, with peanut plants greatly improves peanut growth, leading to a reduction of soilborne disease. The underlying mechanism of peanut responding to the intercropped A. lancea is unknown. We here explored the response of the above- and Responsible Editor: Luz E. de-Bashan Zhen Yang and Ya’nan Zhang contributed to equally to this work. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04615-z) contains supplementary material, which is available to authorized users. X. Li : L. Yu : Y. Liao Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
X. Li e-mail: [email protected] X. Li : Z. Yang : Y. Zhang : C. Ding : X. Wang (*) Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, 210008 Nanjing, China e-mail: [email protected] Z. Yang : C. Dai Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Sciences, Nanjing Normal University, Nanjing 210046, China
belowground peanut parts to volatiles produced by the aboveground parts of A. lancea. Methods Closed cultivation system was used. Composition of volatiles released by A. lancea plant was first determined using headspace solid phase microextraction– gas chromatography/mass spectrometry (SPME-GC-MS). Then, physiological responses of peanut were explored via enzymes activity assay and root secretions. Changes in the peanut rhizosphere fungal and bacterial communities were analyzed by Illumina sequencing. Results The intercropped A. lancea volatiles induced a physiological response in peanut, which includes the increased catalase and phenylalanine ammonia lyase activity in peanut leaf, and improvement of peanut growth. Secretion of organic acids by the peanut root was increased in response to volatile treatment. Pyrosequencing of the whole internal transcribed spacer and 16S rRNA amplicons revealed significant differences in microbial diversity and composition in peanut rhizosphere upon volatile treatment. Conclusions In the intercropping, A. lancea volatiles play a key role in influencing the growth of a neighbouring peanut plant, e.g., increasing biomass and affecting root colonization by soil microorganisms, which may increase plant protection against pathogens. Intercropping patterns could be designed accordingly to increase crop performance.
Keywords Plant volatile . Physiological response . Root exudate . Rhizosphere
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