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Endobacteria in some ectomycorrhiza of Scots Pine (Pinus sylvestris)

Journal article
Authors H Izumi
IC Anderson
IJ Alexander
K Killham
Edward R.B. Moore
Published in FEMS Microbiology Ecology
Volume 56
Issue 1
Pages 34-43
ISSN 1574-6941
Publication year 2006
Published at Institute of Biomedicine, Department of Infectious Medicine
Pages 34-43
Language en
Keywords endobacteria, ectomycorrhiza, ectomycorrhizal fungi, 16S rRNA genes
Subject categories Microbiology


The diversity of cultivable endobacteria associated with four different ectomycorrhizal morphotypes (Suillus flavidus, Suillus variegatus, Russula paludosa and Russula sp.) of Scots pine (Pinus sylvestris) was analysed by restriction fragment length polymorphism profiling of PCR-amplified rDNA intergenic spacer regions and by sequence analyses of 16S rRNA genes. Ectomycorrhizal root tip surface-sterilization methods were developed and assessed for their efficiencies. Bacterial communities from surface-sterilized ectomycorrhizal root tips were different from those of ectomycorrhizal root tips without surface-sterilization for all the morphotypes studied. Endobacteria belonging to the genera Pseudomonas, Burkholderia and Bacillus were isolated from more than one ectomycorrhizal morphotype, whereas species of Rahnella, Janthinobacterium and Rhodococcus were only isolated from the single morphotypes of S. variegatus, R. paludosa and Russula sp., respectively. Some of the isolated endobacteria utilized fungal sugars more readily than typical plant sugars in carbon utilization assays.

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