Plant growth promotion abilities and microscale bacterial dynamics in the rhizosphere of Lupin analysed by phytate utilization ability
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概要
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In the rhizosphere, phosphorus (P) levels are low due to P uptake into the roots. Rhizobacteria live on carbon (C) exuded from roots, and may contribute to plant nutrition by liberating P from organic compounds such as phytates. We isolated over 300 phytate (Na-inositol hexa-phosphate; Na-IHP)-utilizing bacterial strains from the rhizosheath and the rhizoplane of Lupinus albus (L.). Almost all of the isolates were classified as Burkholderia based on 16S rDNA sequence analysis. Rhizosheath isolates cultured with Na-IHP as the only source of C and P showed lower P uptake at the same extracellular phytase activity than rhizoplane strains, suggesting that bacteria from the rhizosheath utilized phytate as a C source. Many isolates also utilized insoluble phytate (Al-IHP and/or Fe-IHP). In co-culture with Lotus japonicus seedlings, some isolates promoted plant growth significantly.
- Blackwell Publishingの論文
著者
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UNNO YUSUKE
National Agricultural Research Center for Hokkaido Region (NARCH)
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大崎 満
北海道大学農学部
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Wasaki Jun
Creative Res. Initiative Sousei (cris) Hokkaido Univ.
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Wasaki Jun
Creative Research Initiative "sousei" Hokkaido University
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大崎 満
北大 農
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Shinano Takuro
Creative Research Initiative "sousei" Hokkaido University
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Osaki Mitsuru
Faculty Of Agriculture Hokkaido University
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Omura Masanori
Graduate School Of Agriculture Hokkaido University
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Shinano Takuro
National Agricultural Res. Center For Hokkaido Region.
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Shinano T
National Agricultural Research Center For Hokkaido Region
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Wasaki Jun
Hiroshima Univ. Higashi‐hiroshima Jpn
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