Low Nitrogen Fertilization Adapts Rice Root Microbiome to Low Nutrient Environment by Changing Biogeochemical Functions
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- Ikeda Seishi
- Graduate School of Life Sciences, Tohoku University Memuro Research Station, National Agricultural Research Center for Hokkaido Region
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- Sasaki Kazuhiro
- Graduate School of Life Sciences, Tohoku University
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- Okubo Takashi
- Graduate School of Life Sciences, Tohoku University
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- Yamashita Akifumu
- Graduate School of Life Sciences, Tohoku University
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- Terasawa Kimihiro
- Graduate School of Life Sciences, Tohoku University
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- Bao Zhihua
- Graduate School of Life Sciences, Tohoku University
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- Liu Dongyan
- Soil Biology and Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University
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- Watanabe Takeshi
- Soil Biology and Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University
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- Murase Jun
- Soil Biology and Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University
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- Asakawa Susumu
- Soil Biology and Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University
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- Eda Shima
- Graduate School of Life Sciences, Tohoku University
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- Mitsui Hisayuki
- Graduate School of Life Sciences, Tohoku University
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- Sato Tadashi
- Graduate School of Life Sciences, Tohoku University
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- Minamisawa Kiwamu
- Graduate School of Life Sciences, Tohoku University
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Reduced fertilizer usage is one of the objectives of field management in the pursuit of sustainable agriculture. Here, we report on shifts of bacterial communities in paddy rice ecosystems with low (LN), standard (SN), and high (HN) levels of N fertilizer application (0, 30, and 300 kg N ha−1, respectively). The LN field had received no N fertilizer for 5 years prior to the experiment. The LN and HN plants showed a 50% decrease and a 60% increase in biomass compared with the SN plant biomass, respectively. Analyses of 16S rRNA genes suggested shifts of bacterial communities between the LN and SN root microbiomes, which were statistically confirmed by metagenome analyses. The relative abundances of Burkholderia, Bradyrhizobium and Methylosinus were significantly increased in root microbiome of the LN field relative to the SN field. Conversely, the abundance of methanogenic archaea was reduced in the LN field relative to the SN field. The functional genes for methane oxidation (pmo and mmo) and plant association (acdS and iaaMH) were significantly abundant in the LN root microbiome. Quantitative PCR of pmoA/mcrA genes and a 13C methane experiment provided evidence of more active methane oxidation in the rice roots of the LN field. In addition, functional genes for the metabolism of N, S, Fe, and aromatic compounds were more abundant in the LN root microbiome. These results suggest that low-N-fertilizer management is an important factor in shaping the microbial community structure containing key microbes for plant associations and biogeochemical processes in paddy rice ecosystems.
収録刊行物
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- Microbes and environments
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Microbes and environments 29 (1), 50-59, 2014
日本微生物生態学会 / 日本土壌微生物学会 / Taiwan Society of Microbial Ecology / 植物微生物研究会 / 極限環境微生物学会
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詳細情報
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- CRID
- 1390282679321884544
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- NII論文ID
- 40020028957
- 130003390907
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- NII書誌ID
- AA11551577
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- COI
- 1:STN:280:DC%2BC2czotVOqtw%3D%3D
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- ISSN
- 13474405
- 13426311
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- NDL書誌ID
- 025368569
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- PubMed
- 24463575
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可