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Title 

Genetic diversity of cultivable plant growth-promoting rhizobacteria in Korea

Authors 

W I KimW K ChoS M KimHyo Sub ChuK Y RyuJ C YunC S Park

Publisher 

The Korean Society for Applied Microbiology

Issue Date 

2011

Citation 

Journal of Microbiology and Biotechnology, vol. 21, no. 8, pp. 777-790

Keywords 

CucumberDiversityPGPRPlant growth promotionRhizobacteriaRhizosphere

Abstract 

To elucidate the biodiversity of plant growth-promoting rhizobacteria (PGPR) in Korea, 7,638 bacteria isolated from the rhizosphere of plant species growing in many different regions were screened. A large number of PGPR were identified by testing the ability of each isolate to promote the growth of cucumber seedlings. After redundant rhizobacteria were removed via amplified rDNA restriction analysis, 90 strains were finally selected as PGPR. On the basis of 16S ribosomal RNA sequences, 68 Gram-positive (76%) and 22 Gram-negative (24%) isolates were assigned to 21 genera and 47 species. Of these genera, Bacillus (32 species) made up the largest complement, followed by Paenibacillus (19) and Pseudomonas (11). Phylogenetic analysis showed that most of the Grampositive PGPR fell into two categories: low- and high- G+C (Actinobacteria) strains. The Gram-negative PGPR were distributed in three categories: α-proteobacteria, β- proteobacteria, and γ-proteobacteria. To our knowledge, this is the largest screening study designed to isolate diverse PGPR. The enlarged understanding of PGPR genetic diversity provided herein will expand the knowledge base regarding beneficial plant-microbe interactions. The outcome of this research may have a practical effect on crop production methodologies.

ISSN 

1017-7825

Link 

http://dx.doi.org/10.4014/jmb.1101.01031

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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