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Pseudomonas aeruginosa inhibits the plant cell wall degrading enzymes of Sclerotium rolfsii and reduces the severity of groundnut stem rot

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Relation http://oar.icrisat.org/4864/
http://dx.doi.org/10.1007/s10658-005-0295-z
 
Title Pseudomonas aeruginosa inhibits the plant cell wall degrading enzymes of Sclerotium rolfsii and reduces the severity of groundnut stem rot
 
Creator Kishore, G K
Pande, S
Rao, J N
Podile, A R
 
Subject Groundnut
 
Description Three hundred and ninety-three groundnut-associated bacterial strains, applied both as seed treatment and soil amendment, were evaluated for control of stem rot disease (caused by Sclerotium rolfsii) of groundnut in a controlled environment. Twelve strains significantly (P=0.01) reduced the incidence of stem, rot of which groundnut seed endophytes Pseudomonas aeruginosa GSE 18 and GSE 19 reduced the seedling mortality by 54% and 58%, compared to the control. In dual cultures, the 12 biocontrol strains reduced the mycelial growth of S. rolfsii by 32%-74% as compared to the control. Cell-free culture filtrates of P. aeruginosa GSE 18 and GSE 19 inhibited the activity in vitro of the cell wall-degrading enzymes (CWDE) polygalacturonase and cellulase by S. rolfsii up to a maximum of 55% and 50%, respectively, when measured 6 days after inoculation. Pseudomonas aeruginosa GSE 18 and GSE 19 with a known tolerance to thiram, a commonly used seed dressing fungicide, suppressed the growth of S. rolfsii, inhibited the activity of CWDE, and reduced the incidence of stem rot, suggesting the usefulness of these biocontrol strains as components in the integrated management of groundnut stem rot.
 
Publisher Springer
 
Date 2005
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/4864/1/Pseudomonas%20aeruginosa%20inhibits%20the%20plant%20cell%20wall%20degrading%20enzymes%20of%20Sclerotium%20rolfsii%20and%20reduces%20the%20severity%20of%20groundnut%20stem%20rot.pdf
Kishore, G K and Pande, S and Rao, J N and Podile, A R (2005) Pseudomonas aeruginosa inhibits the plant cell wall degrading enzymes of Sclerotium rolfsii and reduces the severity of groundnut stem rot. European Journal of Plant Pathology, 113 (3). pp. 315-320. ISSN 0929-1873