Plant growth-promoting activities of Streptomyces spp. in sorghum and rice

Gopalakrishnan, S and Srinivas, V and Sree Vidya, M and Rathore, A (2013) Plant growth-promoting activities of Streptomyces spp. in sorghum and rice. SpringerPlus (574). pp. 1-8.

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Abstract

Five strains of Streptomyces (CAI-24, CAI-121, CAI-127, KAI-32 and KAI-90) were earlier reported by us as biological control agents against Fusarium wilt of chickpea caused by Fusarium oxysporum f. sp. ciceri (FOC). In the present study, the Streptomyces were characterized for enzymatic activities, physiological traits and further evaluated in greenhouse and field for their plant growth promotion (PGP) of sorghum and rice. All the Streptomyces produced lipase, β-1-3-glucanase and chitinase (except CAI-121 and CAI-127), grew in NaCl concentrations of up to 6%, at pH values between 5 and 13 and temperatures between 20 and 40°C and were highly sensitive to Thiram, Benlate, Captan, Benomyl and Radonil at field application level. When the Streptomyces were evaluated in the greenhouse on sorghum all the isolates significantly enhanced all the agronomic traits over the control. In the field, on rice, the Streptomyces significantly enhanced stover yield (up to 25%; except CAI-24), grain yield (up to 10%), total dry matter (up to 18%; except CAI-24) and root length, volume and dry weight (up to 15%, 36% and 55%, respectively, except CAI-24) over the control. In the rhizosphere soil, the Streptomyces significantly enhanced microbial biomass carbon (except CAI-24), nitrogen, dehydrogenase (except CAI-24), total N, available P and organic carbon (up to 41%, 52%, 75%, 122%, 53% and 13%, respectively) over the control. This study demonstrates that the selected Streptomyces which were antagonistic to FOC also have PGP properties.

Item Type: Article
Divisions: RP-Grain Legumes
CRP: CGIAR Research Program on Dryland Cereals
Uncontrolled Keywords: Antagonistic Streptomyces; Plant growth promotion; Field evaluation; Fusarium oxysporum f. sp. ciceri; Sorghum; Rice
Subjects: Mandate crops > Sorghum
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 02 Nov 2013 05:34
Last Modified: 19 Oct 2016 08:28
URI: http://oar.icrisat.org/id/eprint/7227
Official URL: http://dx.doi.org/10.1186/2193-1801-2-574
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: We thank the National Bureau of Agriculturally Important Microorganisms for providing financial support. We also thank all the staff of the biocontrol unit of ICRISAT including M/s PVS Prasad, P Manohar, B Nagappa, D Barath, A Jabbar and S Rohini for their significant inputs in the laboratory, greenhouse and field studies.
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