- KOREAN
- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
ISSN : 2287-8327
Bacterial Diversity in the Rhizosphere of Halophyte Phragmites communis at the Western Coastal Mudflats of Korea
Suhk-Hwan Park (Kunsan National University)
Geon-Hyoung Lee* (Kunsan National University)
Abstract
This study investigated the population densities and diversity of heterotrophic bacteria, and the rhizosphere-to-soil ratios (R/S) in the rhizosphere soil of halophyte Phragmites communis at the western coastal mudflats of Korea. The population densities of aerobic heterotrophic bacteria on the rhizosphere soil of P. communis were in the range of 3.3 ± 0.9 × 107~1.2 ± 0.5 × 108 cfu g-1 dry weight (d. wt.). Population densities of amylolytic bacteria ranged from 1.1 ± 0.2 × 106 to 3.0 ± 1.2 × 106 cfu g-1 d. wt., while those of cellulolytic bacteria and proteolytic bacteria ranged from 5.6 ± 2.3 × 106 to 1.5 ± 0.3 × 107 cfu g-1 d. wt. and from 1.4 ± 0.3 × 106 to 3.5 ± 2.3 × 107 cfu g-1 d. wt., respectively. The R/S ratios ranged from 2.26 to 6.89. Genetic (16S DNA) analysis of fifty-one isolates from the roots of P. communis suggested that the dominant species were closely related to the γ-proteobacteria group (18 clones) and the α-proteobacteria group (14 clones). We found that halophyte species and mudflat environment both affected the rhizosphere bacterial communities.
- keywords
- 16S rDNA, Bacterial population density, Halophyte, Phragmites communis, γ-proteobacteria group, R/S ratio, Rhizosphere
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