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dc.contributor.authorPassari, Ajit Kumar
dc.contributor.authorMishra, Vineet Kumar
dc.contributor.authorGupta, Vijai Kumar
dc.contributor.authorYadav, Mukesh Kumar
dc.contributor.authorSaikia, Ratul
dc.contributor.authorSingh, Bhim Pratap
dc.date.accessioned2018-09-20T16:21:12Z
dc.date.available2018-09-20T16:21:12Z
dc.date.issued2015-09-30
dc.identifier.citationPassari, Ajit Kumar; Mishra, Vineet Kumar; Gupta, Vijai Kumar; Yadav, Mukesh Kumar; Saikia, Ratul; Singh, Bhim Pratap (2015). In vitro and in vivo plant growth promoting activities and dna fingerprinting of antagonistic endophytic actinomycetes associates with medicinal plants. PLOS ONE 10 (9),
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/10379/13417
dc.description.abstractEndophytic actinomycetes have shown unique plant growth promoting as well as antagonistic activity against fungal phytopathogens. In the present study forty-two endophytic actinomycetes recovered from medicinal plants were evaluated for their antagonistic potential and plant growth-promoting abilities. Twenty-two isolates which showed the inhibitory activity against at least one pathogen were subsequently tested for their plant-growth promoting activities and were compared genotypically using DNA based fingerprinting, including enterobacterial repetitive intergenic consensus (ERIC) and BOX repetitive elements. Genetic relatedness based on both ERIC and BOX-PCR generates specific patterns corresponding to particular genotypes. Exponentially grown antagonistic isolates were used to evaluate phosphate solubilization, siderophores, HCN, ammonia, chitinase, indole-3-acetic acid production, as well as antifungal activities. Out of 22 isolates, the amount of indole-3-acetic acid (IAA) ranging between 10-32 mu g/ml was produced by 20 isolates and all isolates were positive for ammonia production ranging between 5.2 to 54 mg/ml. Among 22 isolates tested, the amount of hydroxamate-type siderophores were produced by 16 isolates ranging between 5.2 to 36.4 mu g/ml, while catechols-type siderophores produced by 5 isolates ranging from 3.2 to 5.4 mu g/ml. Fourteen isolates showed the solubilisation of inorganic phosphorous ranging from 3.2 to 32.6 mg/100ml. Chitinase and HCN production was shown by 19 and 15 different isolates, respectively. In addition, genes of indole acetic acid (iaaM) and chitinase (chiC) were successively amplified from 20 and 19 isolates respectively. The two potential strains Streptomyces sp. (BPSAC34) and Leifsonia xyli (BPSAC24) were tested in vivo and improved a range of growth parameters in chilli (Capsicum annuum L.) under greenhouse conditions. This study is the first published report that actinomycetes can be isolated as endophytes from within these plants and were shown to have antagonistic and plant growth promoting abilities. These results clearly suggest the possibility of using endophytic actinomycetes as bioinoculant for plant growth promotion, nutrient mobilization or as biocontrol agent against fungal phytopathogens for sustainable agriculture.
dc.publisherPublic Library of Science (PLoS)
dc.relation.ispartofPLOS ONE
dc.subjectantimicrobial activity
dc.subjectphytopathogenic fungi
dc.subjectmicrobial diversity
dc.subjectdifferent cultivars
dc.subjectwilt pathogen
dc.subjectstreptomyces
dc.subjectsoil
dc.subjectbacteria
dc.subjectchitinase
dc.subjectecology
dc.titleIn vitro and in vivo plant growth promoting activities and dna fingerprinting of antagonistic endophytic actinomycetes associates with medicinal plants
dc.typeArticle
dc.identifier.doi10.1371/journal.pone.0139468
dc.local.publishedsourcehttps://doi.org/10.1371/journal.pone.0139468
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