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Streptomyces sp. RP1A-12 mediated control of peanut stem rot caused by Sclerotium rolfsii

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Relation http://oar.icrisat.org/10383/
 
Title Streptomyces sp. RP1A-12 mediated control of peanut stem rot caused by Sclerotium rolfsii
 
Creator Jacob, S
Sajjalaguddam, R R
Sudini, H
 
Subject Groundnut
Plant Pathology
 
Description Sclerotium rolfsii Sacc. is a destructive soilborne fungal pathogen with a wide host range that includes peanuts. Biological
control offers an interesting alternative to fungicides for sustainable management of soilborne diseases. The current
investigation is aimed at evaluating one potential biocontrol agent Streptomyces sp. RP1A-12 for growth promotion and the
management of peanut stem rot disease caused by S. rolfsii under field conditions. Preliminary studies conducted under in
vitro and greenhouse conditions showed promising results against the stem rot pathogen. Further in vitro and pot experiments
conducted to assess Streptomyces sp. RP1A-12 for its growth promoting abilities using whole organisms have shown an
increase in seed germination, root and shoot length. Other parameters like nodule number and plant biomass were also
significantly increased over control treatments indicating that the test bioagent possesses growth promoting abilities along
with disease suppression capabilities. Subsequently field studies were carried out for two consecutive rainy seasons. The
bioagent was applied as whole organism and partially purified crude metabolites. Results indicate the bioagent reduced
stem rot disease incidence by 64–67% and 22–49% respectively in two field trials conducted with notable increase in yield.
Partially purified Streptomyces sp. RP1A-12 metabolites exhibited an even greater effect in reducing the incidence and
severity of stem rot compared to the pathogen inoculated control.
 
Publisher CAAS
 
Date 2018
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10383/1/Streptomyces%20sp.%20RP1A-12%20mediated%20control%20of%20peanut%20stem%20rot.pdf
Jacob, S and Sajjalaguddam, R R and Sudini, H (2018) Streptomyces sp. RP1A-12 mediated control of peanut stem rot caused by Sclerotium rolfsii. Journal of Integrative Agriculture (TSI), 17. pp. 1-9. ISSN 2095-3119