Microbial ethylene production and inhibition of methanotrophic activity in a deciduous forest soil

Measurement of ethylene and methane production in a temperate forest soil using inhibition of acetylene and carbon monoxide

“…Unfortunately, at present we ARTICLES ATMOSPHERIC SCIENCES cannot effectively explain the reasons why the in situ CH 4 production in the pine forest stand had a larger flush response to N addition than the in situ C 2 H 4 production. Albeit there are differences in CH 4 and C 2 H 4 -oxidizing microorganisms, many previous studies have shown that the behavior of C 2 H 4 accumulation and consumption in forest surface soils can affect the soil CH 4 consumption [6,7,22] . Hence, in situ measurement of C 2 H 4 production in N-fertilized forest soil should be useful to further explaining the effects of N inputs on the net CH 4 flux from forest soils.…”

“…methane production, ethylene production, acetylene, forest soil, nitrogen, carbon monoxide Upland forest soils are now recognized as one of the major sinks for atmospheric methane (CH 4 ) consumption in terrestrial ecosystems (globally 30 Tg CH 4 each year) [1] . Many studies have shown that NH 4 + accumulation [2,3] , water stress [4] and release of monoterpenes [5] and ethylene (C 2 H 4 ) [6,7] in forest surface soils are the main driving factors which may influence net flux of CH 4 from the soil. These previous studies mostly focus on the CH 4 consumption by soils rather than in situ production of CH 4 and C 2 H 4 in forest soils.…”

“…The in situ measurement of CH 4 production in forest surface soils, especially that of N flush effects on its production facilitates to understand the inconsistent effects of NH 4 + -N addition on the soil net CH 4 flux [2,3,[8][9][10] . A series of laboratory studies have shown that the behavior of C 2 H 4 production and consumption in forest surface soils may affect the soil atmospheric CH 4 consumption [6,7] . Thus, the in situ measurement of C 2 H 4 production can partly explain the net CH 4 flux from forest soils, especially after N inputs via rainfall or fertilizers.…”

Ethylene: potential key for biochar amendment impacts

“…However, negative impacts from ethylene have also been observed, such as reduced crop yields, reduced stem growth, increases in root diameter, and stimulated flowering (Abeles et al 1992;Arshad and Frankenberger 1991;Yang and Hoffman 1984). Ethylene also impacts the soil, with observed reductions in microbial ammonium nitrification (Porter 1992) and soil methanotrophic activity (Jäckel et al 2004), and it has been postulated to affect spore germination of fungi (Abeles et al 1992;Arshad and Frankenberger 2002). Observations of ethylene soil gas concentrations have ranged from 0.5 to 18 µL L −1 (Arshad and Frankenberger 2002;Burford 1975;Campbell and Moreau 1979;Ioannou et al 1977;Sheard and Leyshon 1976;Smith and Russell 1969).…”

Plant species diversity affects soil–atmosphere fluxes of methane and nitrous oxide

“…The ecology of soil methanotrophic bacteria 375 consuming atmospheric CH4 is only poorly understood to date, in part due to the lack of 376 success in isolating such organisms from soils (Dunfield 2007). However, it is known from 377 experiments with intact soil cores and with available laboratory cultures that CH4 oxidation 378 is negatively affected by many chemical compounds, including ethylene (Jäckel et al 2004), 379 some organic acids (Wieczorek et al 2011), and terpenes (Amaral et al 1998); one possibility 380 is that the detrimental effect of these substances results from the lack of specificity of 381 methane-monooxygenase, which leads to co-metabolic activity harmful to the bacteria, e.g. 382 by suicide activation (Mahendra and Alvarez-Cohen 2006;Prior and Dalton 1985).…”