Record Details

Plant growth-promoting traits of Streptomyces with biocontrol potential isolated from herbal vermicompost

OAR@ICRISAT

View Archive Info
 
 
Field Value
 
Relation http://oar.icrisat.org/6147/
http://dx.doi.org/10.1080/09583157.2012.719151
 
Title Plant growth-promoting traits of Streptomyces with biocontrol potential isolated from herbal vermicompost
 
Creator Gopalakrishnan, S
Humayun, P
Vadlamudi, S
Vijayabharathi, R
Bhimineni, R K
Rupela, Om
 
Subject Soil Science
Agriculture-Farming, Production, Technology, Economics
Fertilizer Appications
 
Description Three strains of Streptomyces (CAI-21, CAI-26 and MMA-32) were earlier reported by us as having potential for biocontrol of charcoal rot of sorghum, caused by Macrophomina phaseolina (Tassi) Goid., and plant growth promotion (PGP) of the plant. In the present investigation, the three Streptomyces were characterised for their physiological traits (tolerance of salinity, temperature, pH and resistance to antibiotics) and further evaluated in the field for their PGP of rice, grown by a system of rice intensification methods. All three Streptomyces were able to grow in NaCl concentrations of up to 12% (except MMA-32), at pH values between 5 and 13 and temperatures between 20 and 40°C. They were highly resistant to ampicillin and trimethoprim (>800 ppm), sensitive to chloramphenicol, kanamycin and nalidixic acid (50–100 ppm) and highly sensitive to streptomycin and tetracycline (5–25 ppm). When evaluated for their PGP activity on seedlings of rice, % germination and shoot and root lengths were significantly enhanced over the control. In the field, the Streptomyces strains significantly enhanced the panicle length, filled grain numbers and weight, panicle weight, 1000 seed weight, tiller numbers, total dry matter, root length (39–65%), root volume (13–30%), root dry weight (16–24%), grain yield (9–11%) and stover yield (11–22%) over the control. In the rhizosphere soil (0–15 cm from root) at harvest, the population of actinomycetes was significantly enhanced as was microbial biomass carbon (27–83%) and nitrogen (24–43%), dehydrogenase activity (34–152%), available P (13–34%) and N (30–53%) and % organic carbon (26–28%). This study further confirms that the selected Streptomyces have PGP properties.
 
Publisher Taylor & Francis
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
application/pdf
 
Language en
en
 
Rights —
—
 
Identifier http://oar.icrisat.org/6147/1/BioScTEch_22_10_1199-1210_2012.pdf
http://oar.icrisat.org/6147/2/Gopalkrishna_etal_2012.pdf
Gopalakrishnan, S and Humayun, P and Vadlamudi, S and Vijayabharathi, R and Bhimineni, R K and Rupela, Om (2012) Plant growth-promoting traits of Streptomyces with biocontrol potential isolated from herbal vermicompost. Biocontrol Science and Technology, 22 (10). pp. 1199-1210. ISSN 1360-0478