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Diversity of predominant endophytic bacteria in European deciduous and coniferous trees.

Journal article
Authors Hironari Izumi
Ian C Anderson
Ken Killham
Edward R.B. Moore
Published in Canadian journal of microbiology
Volume 54
Issue 3
Pages 173-179
ISSN 0008-4166
Publication year 2008
Published at Institute of Biomedicine, Department of Infectious Medicine
Pages 173-179
Language en
Links dx.doi.org/10.1139/w07-134
Keywords Betula, microbiology, Biodiversity, DNA Fingerprinting, DNA, Bacterial, chemistry, genetics, DNA, Ribosomal, chemistry, genetics, Electrophoresis, Polyacrylamide Gel, methods, Europe, Gram-Negative Bacteria, classification, genetics, growth & development, isolation & purification, Gram-Positive Bacteria, classification, genetics, growth & development, isolation & purification, Molecular Sequence Data, Nucleic Acid Denaturation, Phylogeny, Pinus sylvestris, microbiology, Plant Leaves, microbiology, Plant Roots, microbiology, Plant Stems, microbiology, RNA, Ribosomal, 16S, genetics, Sequence Analysis, DNA, Sequence Homology, Nucleic Acid, Sorbus, microbiology
Subject categories Microbiology

Abstract

The diversity of endophytic bacteria residing in root, stem, and leaf tissues was examined in coniferous and deciduous tree species, Scots pine (Pinus sylvestris L.), silver birch (Betula pendula Roth), and rowan (Sorbus aucuparia L.). Using cultivation-dependent and -independent analyses, the bacterial communities were observed to be significantly different in the belowground (roots and rhizosphere) and aboveground (leaves and stems) samples of the respective host trees. No significant differences, with respect to the different tree species, were observed in the associated communities. Predominant cultivable endophytes isolated included bacteria closely related to Bacillus subtilis, Bacillus licheniformis, Paenibacillus spp., and Acinetobacter calcoaceticus. Comparisons of the most abundant cultivable bacteria in the rhizosphere and root samples suggested that root endophytic bacteria may be in residence through processes of selection or active colonization rather than by passive diffusion from the rhizosphere.

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