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KMID : 0613820140240040461
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Journal of Life Science
2014 Volume.24 No. 4 p.461 ~ p.466
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Diversity and Characteristics of Rhizosphere Microorganisms Isolated from the Soil around the Roots of Three Plants Native to the Dokdo Islands
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Kim Ye-Eun
Yoon Hyeok-Jun
You Young-Hyun
Kim Hyun
Seo Yeong-Gyo
Kim Mi-Ae
Woo Ju-Ri
Nam Yoon-Jong
Irina Khalmuratova
Lee Gyeong-Min
Song Jin-Ha
Jin Young-Ju
Kim Jong-Guk
Seu Young-Bae
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Abstract
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Three plant species, Aster sphathulifolius, Sedum oryzifolium, and Lysimachia mauritiana, native to the Dokdo Islands in South Korea, were examined for rhizosphere microorganisms by using 16S rDNA sequences. Nine species of rhizosphere microorganisms were isolated from the three native plant species, respectively. Phylogenetic analysis showed that the microorganisms could be classified into 19 species belonging to four phyla (Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria), and the characteristics of the microbes were confirmed. Rhizosphere microorganisms from the six orders
(Bacillales, Corynebacteriales, Flavobacteriales, Micrococcales, Oceanospirillales, and Rhodobacterales) were isolated from S. oryzifolium. From L. mauritiana, microbes belonging to the seven orders (Bacillales, Flavobacteriales, Micrococcales, Oceanospirillales, Rhizobiales, and Rhodobacterales) were isolated. From A. sphathulifolius, the six orders of rhizosphere microorganisms (Alteromonadales, Bacillales, Corynebacteriales, Flavobacteriales, Micrococcales, and Rhizobiales) were isolated. These data showed that Actinobacteria and Proteobacteria were the dominant phyla for the rhizosphere of all three plants. To confirm the bacterial diversity in rhizospheres, Shannon’s diversity index (H’) was used at the genus level. In these data, the rhizosphere from S. oryzifolium and L. mauritiana had more diverse bacteria
compared to that from A. sphathulifolius.
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KEYWORD
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16S rDNA, diversity, plants native to the Dokdo Islands, rhizosphere microorganisms, taxonomic analysis
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