Technical note: Manipulating interactions between plant stress responses and soil methane oxidation rates

Zhou, Xiaoqi; Xu, Cheng-Yuan; Bai, Shahla H.; Xu, Zhihong; Smaill, Simeon J.; Clinton, Peter W.; Chen, Chengrong

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 % (inline-formulaP=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.

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Zhou, Xiaoqi / Xu, Cheng-Yuan / Bai, Shahla H. / et al: Technical note: Manipulating interactions between plant stress responses and soil methane oxidation rates. 2018. Copernicus Publications.

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