전체메뉴
검색
Article Search

JMB Journal of Microbiolog and Biotechnology

QR Code QR Code

Note

Related articles in JMB

More Related Articles

Article

Note

J. Microbiol. Biotechnol. 2010; 20(3): 587-593

Published online March 28, 2010 https://doi.org/10.4014/jmb.0907.07017

Copyright © The Korean Society for Microbiology and Biotechnology.

Plant Growth-Promoting Trait of Rhizobacteria Isolated from Soil Contaminated with Petroleum and Heavy Metals

So Yeon Koo 1, Sun Hwa Hong 1, Hee Wook Ryu 2 and Kyung Suk Cho 1*

1Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Korea, 2Department of Chemical and Environmental Engineering, Soongsil University, Seoul 156-743, Korea

Received: July 15, 2009; Accepted: October 18, 2009

Abstract

Three hundred and seventy-four rhizobacteria were isolated from the rhizosphere soil (RS) or rhizoplane (RP) of Echinochloa crus-galli, Carex leiorhyncha, Commelina communis, Persicaria lapathifolia, Carex kobomugi, and Equisetum arvense, grown in contaminated soil with petroleum and heavy metals. The isolates were screened for plant growth-promoting potential (PGPP), including indole acetic acid (IAA) productivity, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, and siderophore(s) synthesis ability. IAA production was detected in 86 isolates (23.0%), ACC deaminase activity in 168 isolates (44.9%), and siderophore(s) synthesis in 213 isolates (57.0%). Among the rhizobateria showing PGPP, 162 rhizobacteria had multiple traits showing more than two types of PGPP. The PGPP-having rhizobateria were more abundant in the RP (82%) samples than the RS (75%). There was a negative correlation (-0.656, p < 0.05) between the IAA-producers and the ACC deaminase producers. Clustering analysis by principal component analysis showed that RP was the most important factor influencing ecological distribution and physiological characterization of PGPP-having rhizobateria.

Keywords: Rhizobacteria, Plant growth-promoting potential, Indole acetic acid (IAA), 1-Aminocyclopropane-1-carboxylic acid deaminase, Siderophore(s)