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Technical note: Manipulating interactions between plant stress responses and soil methane oxidation rates
journal contributionposted on 12.02.2019, 00:00 by X Zhou, Chengyuan XuChengyuan Xu, Shahla Hosseini BaiShahla Hosseini Bai, Z Xu, SJ Smaill, PW Clinton, C Chen
It has recently been hypothesised that ethylene, released into soil by stressed plants, reduces the oxidation of methane by methanotroph. To test this, a field trial was established in which maize plants were grown with and without soil moisture stress, and the effects of addition aminoethoxyvinylglycine (AVG; an ethylene biosynthesis inhibitor) and biochar (increases soil water holding capacity and reduces plant stress) were determined following the static incubation of soil samples. AVG increased methane oxidation rates by 50 % (p = 0.039), but only in the absence of irrigation. No other treatment effects were observed. This result provides evidence for a positive feedback system between plant stress, ethylene production, and impacts on methanotrophic activity. © 2018 Author(s).