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Frequent isolation of sphingomonads from local rice varieties and other weeds grown on acid sulfate soil in South Kalimantan, Indonesia

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Title: Frequent isolation of sphingomonads from local rice varieties and other weeds grown on acid sulfate soil in South Kalimantan, Indonesia
Authors: Hashidoko, Yasuyuki Browse this author →KAKEN DB
Hayashi, Hiroki Browse this author
Hasegawa, Toshihiro Browse this author
Purnomo, Erry Browse this author
Osaki, Mitsuru Browse this author →KAKEN DB
Tahara, Satoshi Browse this author
Keywords: acid–sulfate soil
Oryza sativa L.
rhizobacterium
rhizosphere
Sphingomonas
Issue Date: 30-Sep-2006
Publisher: 日本熱帯生態学会
Journal Title: Tropics
Volume: 15
Issue: 4
Start Page: 391
End Page: 395
Publisher DOI: 10.3759/tropics.15.391
Abstract: We preliminarily investigated the correlation between productivity and the diversity of free-living nitrogen-fixing bacteria on the rhizoplane of local rice varieties, including Siam Unus, Siam Adil and Siam Pandak, all tolerable to acid-sulfate soil in South Kalimantan, Indonesia. The rhizobacteria of some unidentified weeds of native-grown in the acidic paddocks were also searched. Subsequently, sphingomonads, including Sphingomonas spp. and Sphingobium spp., are found as the most dominant rhizobacteria in local rice and also in weeds that are adapted to the strongly acidic wet soil. Other unique rhizobacteria are Alcaligenes spp. that powerfully neutralized their cultured media. To understand how the local variety of paddy rice can tolerate acid-sulfate soils with very low soil pH (2.5-3.5), studies of these acid-tolerant, root-associating, and often nitrogen-fixing, rhizospherous bacteria are likely to be important key factors.
Rights: © 2006 日本熱帯生態学会
Type: article
URI: http://hdl.handle.net/2115/35162
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 橋床 泰之

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