NDLI: The GacS-regulated sigma factor RpoS governs production of several factors involved in biocontrol activity of the rhizobacterium Pseudomonas chlororaphis O6.

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The GacS-regulated sigma factor RpoS governs production of several factors involved in biocontrol activity of the rhizobacterium Pseudomonas chlororaphis O6.

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The GacS-regulated sigma factor RpoS governs production of several factors involved in biocontrol activity of the rhizobacterium Pseudomonas chlororaphis O6.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Oh, Sang A. Kim, Ji Soo Han, Song Hee Park, Ju Yeon Dimkpa, Christian Edlund, Chet Anderson, Anne J. Kim, Young Cheol
Description	Country affiliation: South Korea Author Affiliation: Oh SA ( Institute of Environmentally Friendly Agriculture, Chonnam National University, Gwangju, South Korea.)
Abstract	Pseudomonas chlororaphis O6 possesses many beneficial traits involved in biocontrol of plant diseases. In this paper, we examined the effect of a mutation in rpoS encoding a stress-related alternative sigma factor to better understand the regulation of these traits. Biochemical studies indicated that production of acyl homoserine lactones was altered and phenazine was increased in the P. chlororaphis O6 rpoS mutant. The rpoS mutation reduced hydrogen cyanide levels, but the rpoS mutant still displayed a level of in vitro antifungal activity against Fusarium graminearum and Alternaria alternata. Tomato root colonization by the rpoS mutant was lower than that by the wild type at 5, 7, and 13 days after inoculation. The rpoS mutant was less effective than the wild type in induction of systemic resistance to two foliar pathogens after root inoculation of the tomato plants. Our findings demonstrate that the stationary-phase sigma factor RpoS regulates production of several key factors involved in the biocontrol potential of P. chlororaphis O6, some independently of the global regulator GacS.
File Format	HTM / HTML
ISSN	00084166
e-ISSN	14803275
Journal	Canadian Journal of Microbiology
Issue Number	8
Volume Number	59
Language	English
Publisher	Canadian Science Publishing
Publisher Date	2013-08-01
Publisher Place	Canada
Access Restriction	Open
Subject Keyword	Discipline Microbiology Bacterial Proteins Metabolism Pseudomonas Genetics Sigma Factor Acyl-butyrolactones Antifungal Agents Fusarium Growth & Development Hydrogen Cyanide Lycopersicon Esculentum Microbiology Microbial Interactions Mutation Phenazines Plant Roots Transcription Factors Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Molecular Biology Immunology Microbiology Applied Microbiology and Biotechnology

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