Effects of elevated carbon dioxide, elevated temperature, and rice growth stage on the community structure of rice root-associated bacteria

Takashi Okubo, Takeshi Tokida, Seishi Ikeda, Zhihua Bao, Kanako Tago, Masahito Hayatsu, Hirofumi Nakamura, Hidemitsu Sakai, Yasuhiro Usui, Kentaro Hayashi, Toshihiro Hasegawa, Kiwamu Minamisawa

    研究成果: Article査読

    24 被引用数 (Scopus)

    抄録

    The effects of free-air carbon dioxide enrichment (FACE) and elevated soil and water temperature (warming) on the rice root-associated bacterial community were evaluated by clone library analysis of the 16S ribosomal RNA gene. Roots were sampled at the panicle initiation and ripening stages 41 and 92 days after transplanting (DAT), respectively. The relative abundances of the methanotrophs Methylosinus and Methylocystis were increased by warming and decreased by FACE at 92 DAT, which indicated that microbial methane (CH4) oxidation in rice roots may have been influenced by global warming. The relative abundance of Burkholderia kururiensis was increased by warming at 41 DAT and by FACE or warming at 92 DAT. The abundances of methanotrophs increased during rice growth, which was likely induced by an enhancement in the emission of CH4 from the paddy fields, suggesting that CH4 is one of the predominant factors affecting the structure of the microbial community in rice roots. Marked variations in the community structure were also observed during rice growth in other genera: Bradyrhizobium, Clostridium, and an unknown genus close to Epsilonproteobacteria were abundant at 92 DAT, whereasAchromobacter was abundant at 41 DAT. These results demonstrated that the community structures of rice root-associated bacteria were markedly affected by FACE, temperature, and the rice growth stage.

    本文言語English
    ページ(範囲)184-190
    ページ数7
    ジャーナルMicrobes and environments
    29
    2
    DOI
    出版ステータスPublished - 2014

    ASJC Scopus subject areas

    • 生態、進化、行動および分類学
    • 土壌科学
    • 植物科学

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