Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen

M. Nagarajkumar; R. Bhaskaran; R. Velazhahan

doi:10.1016/j.micres.2004.01.005

Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen

M. Nagarajkumar, R. Bhaskaran, R. Velazhahan^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

173 Citations (Scopus)

Abstract

Fourteen strains of Pseudomonas fluorescens isolated from rhizosphere soil of rice were tested for their antagonistic effect towards Rhizoctonia solani, the rice sheath blight fungus. Among them, PfMDU2 was the most effective in inhibiting mycelial growth of R. solani in vitro. Production of chitinase, β-1,3-glucanase, siderophores, salicylic acid (SA) and hydrogen cyanide (HCN) by P. fluorescens strains was evaluated. The highest β-1,3-glucanase activity, siderophore production, SA production and HCN production were recorded with PfMDU2. A significant relationship between the antagonistic potential of P. fluorescens against R. solani and its level of β-1,3-glucanase, SA and HCN was observed.

Original language	English
Pages (from-to)	73-81
Number of pages	9
Journal	Microbiological Research
Volume	159
Issue number	1
DOIs	https://doi.org/10.1016/j.micres.2004.01.005
Publication status	Published - 2004
Externally published	Yes

Keywords

Biological control
Oryza sativa
Pseudomonas flourescens
Rhizoctonia solani
Sheath blight

ASJC Scopus subject areas

Microbiology

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10.1016/j.micres.2004.01.005

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@article{304c211328504aca86a36c7d62157699,

title = "Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen",

abstract = "Fourteen strains of Pseudomonas fluorescens isolated from rhizosphere soil of rice were tested for their antagonistic effect towards Rhizoctonia solani, the rice sheath blight fungus. Among them, PfMDU2 was the most effective in inhibiting mycelial growth of R. solani in vitro. Production of chitinase, β-1,3-glucanase, siderophores, salicylic acid (SA) and hydrogen cyanide (HCN) by P. fluorescens strains was evaluated. The highest β-1,3-glucanase activity, siderophore production, SA production and HCN production were recorded with PfMDU2. A significant relationship between the antagonistic potential of P. fluorescens against R. solani and its level of β-1,3-glucanase, SA and HCN was observed.",

keywords = "Biological control, Oryza sativa, Pseudomonas flourescens, Rhizoctonia solani, Sheath blight",

author = "M. Nagarajkumar and R. Bhaskaran and R. Velazhahan",

note = "Funding Information: This work was supported by a grant from the Rockefeller Foundation, USA.",

year = "2004",

doi = "10.1016/j.micres.2004.01.005",

language = "English",

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pages = "73--81",

journal = "Microbiological Research",

issn = "0944-5013",

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T1 - Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen

AU - Nagarajkumar, M.

AU - Bhaskaran, R.

AU - Velazhahan, R.

N1 - Funding Information: This work was supported by a grant from the Rockefeller Foundation, USA.

PY - 2004

Y1 - 2004

N2 - Fourteen strains of Pseudomonas fluorescens isolated from rhizosphere soil of rice were tested for their antagonistic effect towards Rhizoctonia solani, the rice sheath blight fungus. Among them, PfMDU2 was the most effective in inhibiting mycelial growth of R. solani in vitro. Production of chitinase, β-1,3-glucanase, siderophores, salicylic acid (SA) and hydrogen cyanide (HCN) by P. fluorescens strains was evaluated. The highest β-1,3-glucanase activity, siderophore production, SA production and HCN production were recorded with PfMDU2. A significant relationship between the antagonistic potential of P. fluorescens against R. solani and its level of β-1,3-glucanase, SA and HCN was observed.

AB - Fourteen strains of Pseudomonas fluorescens isolated from rhizosphere soil of rice were tested for their antagonistic effect towards Rhizoctonia solani, the rice sheath blight fungus. Among them, PfMDU2 was the most effective in inhibiting mycelial growth of R. solani in vitro. Production of chitinase, β-1,3-glucanase, siderophores, salicylic acid (SA) and hydrogen cyanide (HCN) by P. fluorescens strains was evaluated. The highest β-1,3-glucanase activity, siderophore production, SA production and HCN production were recorded with PfMDU2. A significant relationship between the antagonistic potential of P. fluorescens against R. solani and its level of β-1,3-glucanase, SA and HCN was observed.

KW - Biological control

KW - Oryza sativa

KW - Pseudomonas flourescens

KW - Rhizoctonia solani

KW - Sheath blight

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DO - 10.1016/j.micres.2004.01.005

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SN - 0944-5013

VL - 159

SP - 73

EP - 81

JO - Microbiological Research

JF - Microbiological Research

IS - 1

ER -

Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen

Abstract

Keywords

ASJC Scopus subject areas

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