Exploring plant growth-promotion actinomycetes from vermicompost and rhizosphere soil for yield enhancement in chickpea
Date
2016-03-31ISI journal
Impact factor: 0.865 (Year: 2016)
Citation
M. Sreevidya, Subramaniam Gopalakrishnan, Hima bindu Kudapa, Rajeev Varshney. (31/3/2016). Exploring plant growth-promotion actinomycetes from vermicompost and rhizosphere soil for yield enhancement in chickpea. Brazilian Journal of Microbiology, 47 (1), pp. 85-95.
Abstract
tThe main objective of the present study was to isolate and characterize actinomycetes fortheir plant growth-promotion in chickpea. A total of 89 actinomycetes were screened fortheir antagonism against fungal pathogens of chickpea by dual culture and metabolite pro-duction assays. Four most promising actinomycetes were evaluated for their physiologicaland plant growth-promotion properties under in vitro and in vivo conditions. All the isolatesexhibited good growth at temperatures from 20◦C to 40◦C, pH range of 7–11 and NaCl con-centrations up to 8%. These were also found highly tolerant to Bavistin, slightly tolerantto Thiram and Captan (except VAI-7 and VAI-40) but susceptible to Benlate and Ridomil atfield application levels and were found to produce siderophore, cellulase, lipase, protease,chitinase (except VAI-40), hydrocyanic acid (except VAI-7 and VAI-40), indole acetic acidand -1,3-glucanase. When the four actinomycetes were evaluated for their plant growth-promotion properties under field conditions on chickpea, all exhibited increase in nodulenumber, shoot weight and yield. The actinomycetes treated plots enhanced total N, availableP and organic C over the un-inoculated control. The scanning electron microscope stud-ies exhibited extensive colonization by actinomycetes on the root surface of chickpea. Theexpression profiles for indole acetic acid, siderophore and -1,3-glucanase genes exhibitedup-regulation for all three traits and in all four isolates. The actinomycetes were identi-fied as Streptomyces but different species in the 16S rDNA analysis. It was concluded thatthe selected actinomycetes have good plant growth-promotion and biocontrol potentialson chickpea
DSpace URI
https://hdl.handle.net/20.500.11766/6851Other URI
http://oar.icrisat.org/id/eprint/9330Collections
Author(s) ORCID(s)
Gopalakrishnan, Subramaniamhttps://orcid.org/0000-0003-4053-7016
Subject(s)
AGROVOC Keywords
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