Microbial mechanism for rice variety control on methane emission from rice field soil

• DOI: 10.1111/j.1365-2486.2009.02145.x
• Publication Date: 2009-12-16T19:25:56Z
• Authors: KE MA; QIONGFEN QIU; YAHAI LU
• Keywords: Paddy field; Bulk soil

Abstract Rice variety is one of the key factors regulating methane (CH 4 ) production and emission from paddy fields. However, relationships between rice varieties populations microorganisms involved in CH dynamics are poorly understood. Here we investigated composition abundance ‐producing archaea ‐oxidizing bacteria a Chinese field soil planted with three types rice. Hybrid produced 50–60% more shoot biomass than Indica Japonica cultivars. rate was similar to lower Indica. Furthermore, dissolved concentration rhizosphere hybrid markedly The showed potential but higher oxidation compared conventional varieties. Terminal restriction fragment length polymorphism analysis archaeal 16S rRNA genes that hydrogenotrophic methanogens dominated whereas acetoclastic mainly inhabited bulk soil. total as determined by quantitative (real‐time) PCR increased later stage growth. did not significantly influence structure methanogenic archaea. pmoA gene fragments (encoding α‐subunit particulate monooxygenase) revealed also methanotrophic proteobacteria, though variable effects layer sampling time were observed. copy number approximately order magnitude greater two results suggest stimulates growth methanotrophs rhizosphere, hence enhances which attenuates emissions becoming popular Asian countries. present study demonstrated planting will enhance albeit grain