Mechanisms of plant growth promotion and disease suppression by Pseudomonas aeruginosa strain 2apa

Hariprasad, P. and Chandrashekar, S. and Singh, S. B. and Niranjana, S. R. (2014) Mechanisms of plant growth promotion and disease suppression by Pseudomonas aeruginosa strain 2apa. Journal of Basic Microbiology, 54 (8). pp. 792-801. ISSN 0233-111X

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Abstract

A new Pseudomonas strain, designated as 2apa was isolated from tomato rhizosphere and identified as a member of species Pseudomonas aeruginosa based on its morphology, conventional, biochemical, cell wall fatty acid methyl ester analysis, and 16S rRNA gene sequence analysis. The strain 2apa was positive for root colonization, indole acetic acid (IAA), salicylic acid and siderophore production and inhibited the growth of wide range of microorganisms. Antimicrobial substances produced by this strain with further purification and structure elucidation proved to be phenazine. Under laboratory and greenhouse conditions the strain promoted plant growth and suppressed a wide range of foliar and root pathogens in tomato. The protection offered by strain 2apa to foliar pathogens is considered as induced systemic resistance and was further confirmed by enhanced accumulation of phenolics, elicitation of lipoxygenas activity, and jasmonic acid levels. The broad-spectrum antimicrobial and induced systemic resistance exhibiting strain P. aeruginosa 2apa can be used as an effective biological control candidate against devastating fungal and bacterial pathogens, which attack both root and foliar portions of tomato plant. Production of other functional traits such as IAA and siderophore may enhance its potential as biofertilizer.

Item Type:	Article
Uncontrolled Keywords:	biosynthesis, metabolism, antiinfective agent, development and aging, genetics, growth, microbiology, pathogenicity, plant disease, Plant Diseases, biological control agent, tomato, Anti-Infective Agents, isolation and purification, Biological, Pseudomonas aeruginosa, bacterium identification, RNA 16S, plant root, RNA, Biological Control Agents, indoleacetic acid, indoleacetic acid derivative, Indoleacetic Acids, Ribosomal, Ralstonia solanacearum, Lycopersicon esculentum, Bacteria (microorganisms), Plant Roots, Rhizobiales, 16S, Bacterial Typing Techniques, biological pest control, Pest Control, phenazine derivative, Phenazines, Pseudomonas, rhizosphere, Rhizosphere, salicylic acid, Salicylic Acid, siderophore, Siderophores
Subjects:	B Life Science > Biotechnology
Divisions:	Department of > Biotechnology
Depositing User:	Arshiya Kousar Library Assistant
Date Deposited:	21 Jun 2019 05:48
Last Modified:	21 Jun 2019 07:54
URI:	http://eprints.uni-mysore.ac.in/id/eprint/3494

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