Development of Broad-Spectrum Actinomycetes for Biocontrol and Plant Growth Promotion of Food Crops

Gopalakrishnan, S and Ranga Rao, G V and Ratna Kumari, B and Vijayabharathi, R and Srinivas, V and Gowda, C L L (2013) Development of Broad-Spectrum Actinomycetes for Biocontrol and Plant Growth Promotion of Food Crops. In: Recent Advances in Biofertilizers and Biofungicides (PGPR) For Sustainable Agriculture: Proceedings of 3rd Asian Conference on Plant Growth-Promoting Rhizobacteria (PGPR) and other Microbials Manila, Philippines April 21-24, 2013. the Conference, Manila, Philippines, pp. 75-100.

[img]
Preview
PDF - Published Version
Download (493kB) | Preview
[img]
Preview
PDF - Published Version
Download (383kB) | Preview

Abstract

Current investigation is aimed at identifying actinomycetes and their metabolites with multiple actions against insect pests and pathogens, including plant growth promotion (PGP). We characterized 137 actinomycetes, isolated from 25 different herbal vermi-composts, for their antagonistic potential against charcoal rot in sorghum (caused by Macrophomina phaseolina) and wilt in chickpea (caused by Fusarium oxysporum f. sp. ciceri [FOC], respectively) by dual culture assay. Of the isolates, three most promising M. phaseolina antagonistic strains (CAI-21, CAI-26 and MMA-32) and five most promising FOC antagonistic strains (CAI-24, CAI-121, CAI-127, KAI-32 and KAI-90) were further evaluated for their antagonistic and PGP potential by blotter paper assay, greenhouse and field conditions. All the eight strains were characterized for their physiological traits (tolerance to salinity, temperature, pH and compatibility to antibiotics and fungicides) and further evaluated in the field for their PGP on rice. Ten strains (CAI-8, CAI-13, CAI-70, CAI-85, CAI-87, CAI-132, CAI-133, CAI-155, SAI-25 and BCA-508) were also found effective in suppressing Helicoverpa, Spodoptera and Chilo spp. under laboratory and greenhouse conditions. The sequences of 16S rDNA gene of all eighteen strains matched with Streptomyces, but species appeared to be different. This study confirms that the selected Streptomyces strains have broad-spectrum biocontrol and PGP properties.

Item Type: Book Section
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Subjects: Others > Plant Pathology
Others > Food and Nutrition
Others > Agriculture-Farming, Production, Technology, Economics
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 09 Oct 2013 03:48
Last Modified: 30 Dec 2014 10:17
URI: http://oar.icrisat.org/id/eprint/7157
Links:

Actions (login required)

View Item View Item