open access

https://hdl.handle.net/2115/35161

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

英語

Sphingomonas rosa

2006-09-30

日本熱帯生態学会

Tropics

15(4)

365-369

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.

学術雑誌論文

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© 2006 日本熱帯生態学会

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