Effect of temperature on structure and function of the methanogenic archaeal community in an anoxic rice field soil

Article Abstract:

A study has been conducted on the effect of temperature changes on the structure of methanogenic archaeal community. To accurately determine temperature change effects, DNA was extracted from soil slurries that were incubated at 30 deg and 15 deg Celcius. Researchers discovered that archaeal community structure changed when the temperature shifted from 30 deg to 15 deg Celcius. This resulted in the decrease of CH4 production rate, steady state H2 partial pressure and a transient accumulation of acetate.

Biochemistry, Soils, Crops (Plants), Crops and climate, Agricultural climatology, Crops and soils

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Amino acid substitutions in GyrA of Burkholderia glumae are implicated in not only oxolinic acid resistance but also fitness on rice plants

Article Abstract:

Oxolinic acid (OA)-resistant mutants were selected among spontaneous in vitro mutants from the Burkholderia glumae strain to investigate their OA-resistant mechanisms. The results suggest that amino acid substitutions in GyrA of Burkholderia glumae are implicated in not only OA resistance but also fitness on rice plants, hence GyrA83 is thought to be responsible for OA resistance in Burkholderia glumae field isolates.

Analysis, Genetic aspects, Polymerase chain reaction, Plant mutation, Properties, Quinolones, Nucleotide sequencing

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Differential effects of nitrogenous fertilizers on methane-consuming microbes in rice field and forest soils

Article Abstract:

Rice fields and forest soils were incubated in microcosms and supplemented with different nitrogenous fertilizers and methane concentrations and the effects of nitrogenous fertilizers on methane-consuming microbes were studied. In both rice fields and forest soils the activity as well as the growth rate of methane-consuming bacteria was affected differentially.

Composition, Forest soils

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