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Plant growth promotion abilities and microscale bacterial dynamics in the rhizosphere of Lupin analysed by phytate utilization ability

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Title: Plant growth promotion abilities and microscale bacterial dynamics in the rhizosphere of Lupin analysed by phytate utilization ability
Authors: Unno, Yusuke Browse this author
Okubo, Kenzo Browse this author
Wasaki, Jun Browse this author
Shinano, Takuro4 Browse this author
Osaki, Mitsuru Browse this author →KAKEN DB
Authors(alt): 信濃, 卓郎4
Issue Date: Mar-2005
Publisher: Blackwell Publishing
Journal Title: Environmental Microbiology
Volume: 7
Issue: 3
Start Page: 396
End Page: 404
Publisher DOI: 10.1111/j.1462-2920.2004.00701.x
PMID: 15683400
Abstract: 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.
Rights: (c)2005 Blackwell Publishing Ltd. and The Society for Applied Microbiology. Published jointly with the Society for Applied Microbiology
Type: article (author version)
URI: http://hdl.handle.net/2115/539
Appears in Collections:創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 信濃 卓郎

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