Record ID No. |
2239 |
Author(s) |
Kataoka R., Futai K. , 2009 |
Affiliation |
Kyoto University, Grad Sch Agr, Lab Environm Mycosci, Kitashirakawaoiwake Cho, Kyoto 6068502, Japan, Email: rkataoka@hotmail.co.jp |
Title |
A new mycorrhizal helper bacterium, Ralstonia species, in the ectomycorrhizal symbiosis between Pinus thunbergii and Suillus granulatus |
Source. Vol.(no):Page |
Biology and Fertility of Soils. 45(3): 315-320p. |
Categories |
Ectomycorrhiza |
Subjects |
Biological Interaction |
Sub-subjects |
Mycorrhiza helper bacteria |
Host |
Robinia pseudoacacia, Pinus thunbergii |
Organism |
Suillus granulatus, Ralstonia sp. And B. Subtilis (Mycorrhiza Helper Bacteria (MHB)) |
Country |
Japan, East Asia |
Abstracts |
In a Robinia-pseudoacacia-dominated coastal forest in Tottori prefecture Japan, the growth and survival of Pinus thunbergii seedlings and the natural regeneration of P. Thunbergii was disturbed by R. Pseudoacacia. In order to improve the growth of P. Thunbergii seedling in the Tottori sand dune, we tried to find a mycorrhiza helper bacteria (MHB) from P. Thunbergii mycorrhizosphere in a Tottori sand dune. Two MHB, Ralstonia sp. And Bacillus subtilis, were selected from the nine bacterial species isolated from the mycorrhizosphere of P. Thunbergii. The bacterial effect on the ectomycorrhizal fungus Suillus granulatus was investigated by confrontation assay and a microcosm experiment. The confrontation assay showed that Ralstonia sp. Promoted the hyphal growth of S. Granulatus. Moreover, the S. Granulatus-P. Thunbergii symbiosis was significantly stimulated by Ralstonia sp. And B. Subtilis. Ralstonia sp. And B. Subtilis were regarded as MHB associated with P. Thunbergii. This is the first report of Ralstonia sp. As an MHB. |