Temporal variation in methanogenic community structure and methane production potential of tropical rice ecosystem

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• 作者：Alpana Singh ; Suresh K. Dubey ; ^{sureshkd1@hotmail.com}
• 关键词：Methanogens diversity ; Methane production ; Tropical rice ecosystem ; Temporal variation
• 刊名：Soil Biology & Biochemistry
• 出版年：2012
• 期刊代码：96_00380717
• 类别：abs
• 出版时间：May, 2012
• 卷：48
• 期：Complete
• 页码：162-166
• 文件大小：265 K

摘要

Temporal variations in diversity of methanogenic community and CH₄ production potential were analyzed in an Indian tropical rice ecosystem. Laboratory incubations showed that methane production varied from 20.86 to 134.11聽渭g CH₄聽g^鈭? d.w.s. during the two consecutive years, 2009 and 2010. CH₄ production potential was high at the flowering stage of the rice crop followed by ripening, tillering, post-harvest and pre-plantation stage. Phylogenetic analysis of 16S rRNA genes of methanogenic community indicated that flowering and ripening stages comprised of Methanomicrobiaceae, Methanosarcinaceae, Methanosaetaceae and RC I methanogenic groups, while only the members of Methanomicrobiaceae and RC I were present in the remaining stages. Further, the dominance of RC I was observed in all stages. This study demonstrates that flowering and ripening stages of rice crop offer relatively favorable ecological niche for methanogenic community. The overall analyses suggest that the temporal change in diversity of methanogens regulates CH₄ production potential in rice field soils.