Document Detail

Plant Growth Promoting Potential and Soil Enzyme Production of the Most Abundant Streptomyces spp. from Wheat Rhizosphere.
MedLine Citation:
PMID:  22849825     Owner:  NLM     Status:  Publisher    
AIM: To evaluate the plant growth promotion (PGP) potential and soil enzyme production under solid state fermentation (SSF) by most abundant Streptomyces spp. isolated from the wheat rhizosphere and to evaluate their effect on plant growth parameters. METHODS AND RESULTS: Actinomycetes were isolated from wheat rhizosphere and screened for plant growth promotion (PGP) activities. Three Actinomycete isolates having significantly higher PGP activities (S. rochei IDWR19, S. carpinensis IDWR53, S. thermolilacinus IDWR81) were selected. The soil enzymes production potential of these isolates using soil extract and wheat straw under ssf was assessed. Utilization of soil extract as a fermentation medium for soil enzyme production by Actinomycetes has been reported first time in this study. Maximum chitinase (S. rochei IDWR19 12.2 Umg(-1) protein) and phytase activity (S. carpinensis IDWR53 5.2 Umg(-1) protein) was produced on 7(th) day of incubation whereas maximum alkaline protease (S. rochei IDWR19 3.2 Umg(-1) protein) was produced on 6(th) day of incubation. For cellulase (S. rochei IDWR19 7.4 Umg(-1) protein) and invertase (S. carpinensis IDWR53 451 Umg(-1) protein) maximum activity was observed on 4(th) as well as 5(th) day of incubation. On the basis of PGP activity and enzyme production, two Actinomycete isolates (S. rochei IDWR19 and S. thermolilacinus IDRWR81) were selected for plant growth experiment. An increase of 12.2% and 24.5% in shoot length of plants inoculated with S. rochei IDWR19 and S. thermolilacinus IDWR81 was observed respectively. A similar increase in biomass of 1.8 and 2.3 fold was also recorded for the two isolates respectively. CONCLUSIONS: It could be concluded that Streptomyces sp. with high PGP activities and soil enzyme production capability significantly improved growth and development of wheat cv. SIGNIFICANCE AND IMPACT OF STUDY: The abundant Actinomycetes obtained in this study (S. rochei IDWR19 and S. thermolilacinus IDWR81) are rhizosphere competent and effective strains. © 2012The Authors Journal of Applied Microbiology © 2012 The Society for Applied Microbiology.
R Jog; G Nareshkumar; S Rajkumar
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-31
Journal Detail:
Title:  Journal of applied microbiology     Volume:  -     ISSN:  1365-2672     ISO Abbreviation:  J. Appl. Microbiol.     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-8-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012The Authors Journal of Applied Microbiology © 2012 The Society for Applied Microbiology.
Institute of Science, Nirma University, Ahmedabad, 81, Gujarat, India.
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