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Evaluation of Streptomyces strains isolated from herbal vermicompost for their plant growth-promotion traits in rice

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Relation http://oar.icrisat.org/7107/
http://dx.doi.org/10.1016/j.micres.2013.09.008
10.1016/j.micres.2013.09.008
 
Title Evaluation of Streptomyces strains isolated from herbal vermicompost for their plant growth-promotion traits in rice
 
Creator Gopalakrishnan, S
Srinivas, V
Prakash, B
Arumugam, S
Vijayabharathi, R
Rupela, O
Kudapa, H
Krishnamohan, K
Varshney, R K
 
Subject Fertilizer Appications
 
Description Six actinomycetes, CAI-13, CAI-85, CAI-93, CAI-140, CAI-155 and KAI-180, isolated from six different herbal vermi-composts were characterized for in-vitro plant growth-promoting (PGP) properties and further evaluated in the field for PGP activity in rice. Of the six actinomycetes, CAI-13, CAI-85, CAI-93, CAI-140 and CAI-155 produced siderophores; CAI-13, CAI-93, CAI-155 and KAI-180 produced chitinase; CAI-13, CAI-140, CAI-155 and KAI-180 produced lipase; CAI-13, CAI-93, CAI-155 and KAI-180 produced protease; and CAI-13, CAI-85, CAI-140 and CAI-155 produced β-1-3-glucanase whereas all the six actinomycetes produced cellulase, hydrocyanic acid and indole acetic acid (IAA). The actinomycetes were able to grow in NaCl concentrations of up to 8%, at pH values between 7 and 11, temperatures between 20 and 40 °C and compatible with fungicide bavistin at field application levels. In the rice field, the actinomycetes significantly enhanced tiller numbers, panicle numbers, filled grain numbers and weight, stover yield, grain yield, total dry matter, root length, volume and dry weight over the un-inoculated control. In the rhizosphere, the actinomycetes also significantly enhanced total nitrogen, available phosphorous, % organic carbon, microbial biomass carbon and nitrogen and dehydrogenase activity over the un-inoculated control. Sequences of 16S rDNA gene of the actinomycetes matched with different Streptomyces species in BLAST analysis. Of the six actinomycetes, CAI-85 and CAI-93 were found superior over other actinomycetes in terms of PGP properties, root development and crop productivity. qRT-PCR analysis on selected plant growth promoting genes of actinomycetes revealed the up-regulation of IAA genes only in CAI-85 and CAI-93.
 
Publisher Elsevier
 
Date 2014
 
Type Article
PeerReviewed
 
Format application/pdf
application/pdf
 
Language en
en
 
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Identifier http://oar.icrisat.org/7107/7/MR_GopalKrishnan-etal_2013.pdf
http://oar.icrisat.org/7107/13/Microbiological%20Research_169_%2040%E2%80%93%2048_2014.pdf
Gopalakrishnan, S and Srinivas, V and Prakash, B and Arumugam, S and Vijayabharathi, R and Rupela, O and Kudapa, H and Krishnamohan, K and Varshney, R K (2014) Evaluation of Streptomyces strains isolated from herbal vermicompost for their plant growth-promotion traits in rice. Microbiological Research, 169. pp. 40-48. ISSN 0944-5013