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Characterization and ecological role of free-living nitrogen-fixing bacteria isolated from the rhizoplane of Melastoma malabathricum inhabiting acidic plain lands in Kalimantan

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Title: Characterization and ecological role of free-living nitrogen-fixing bacteria isolated from the rhizoplane of Melastoma malabathricum inhabiting acidic plain lands in Kalimantan
Authors: Hashidoko, Yasuyuki Browse this author →KAKEN DB
Gotou, Yukako Browse this author
Osaki, Mitsuru Browse this author →KAKEN DB
Purnomo, Erry Browse this author
Suwido, Limin H. Browse this author
Tahara, Satoshi Browse this author
Keywords: Acid–sulfate soil
Burkholderia cepacia
Melastoma malabathricum
Rhizoplane bacterium
Sphingomonas rosa
Issue Date: 30-Sep-2006
Publisher: 日本熱帯生態学会
Journal Title: Tropics
Volume: 15
Issue: 4
Start Page: 365
End Page: 369
Publisher DOI: 10.3759/tropics.15.365
Abstract: The rhizoplane microorganisms of Melastoma malabathricum, distributing throughout the acid sulfate and peat soils of South Kalimantan, Indonesia, were investigated, using a soft gel media of N-free Winogradsky's mineral solution solidified with 0.3 % gellan gum. Two bacteria, Sphingomonas rosa EC-K013 and Burkholderia cepacia EC-K014 belonging to the subclasses of α- and β-Proteobacteria, respectively, emerged in the nitrogen-free medium. Inoculation of S. rosa EC-K013 in the M. malabathricum seedlings grown in N-free, 1/4 Hoagland's No. 2 medium (pH 3.0) resulted in better growth of the seedlings. In the soft gel medium, EC-K013 also stimulated the growth of a root-associating fungus, tentatively identified as Nectria sp. and a nitrogen-fixer, Mesorhizobium sp., suggesting that S. rosa plays an important role in promotion of microfloral devlopment around the rhizosphere of some acidic soil-adapting plants.
Rights: © 2006 日本熱帯生態学会
Type: article
URI: http://hdl.handle.net/2115/35161
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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