International Journal of Chemical Studies
Vol. 5, Issue 3 (2017)
Biocontrol potential and plant growth promotional activity of Pseudomonas fluorescence for the management of blast disease in Rice
Author(s): Akhilesh Kumar Kulmitra, Neha Sahu and Parmeshwar Sahu
Abstract: In vitro and in vivo evaluated the antagonistic effects of three isolates of Pseudomonas from rhizosphere of rice against Pyricularia oryzae by using plate assay technique. The isolates were studies for the production of indole acetic acid, hydrogen cyanide, siderophore, protease and phosphate solubilization activity. All the 20 isolates of Pseudomonas fluorescence showed positive reaction for the production of HCN and siderophores, 15 isolates showed positive for plant growth promoting hormone, IAA. Among the 20 isolates, 19 isolates showed phosphate solubilisation on NBRIP medium under greenhouse conditions. The biocontrol activity and plant growth promotion of bacterial strains were evaluated, in which soil-inoculation of NCIM 2099 (the reference strain), TS3C8 and TS3B5 reduced disease index to a range of 12.75% (P ≤ 0.05) compared to the untreated control at 27.6%. The plants treated with TS3C8 isolate recorded maximum root length and plant height, which were increased by 34.21cm and 77.58cm respectively over the diseased control under greenhouse condition. These results indicate that the tested PGPR improved growth parameters in rice plants and inhibit the growth of the fungus Pyricularia oryzae causing rice blast disease.
Pages: 820-825 | 587 Views 20 Downloads
How to cite this article:
Akhilesh Kumar Kulmitra, Neha Sahu, Parmeshwar Sahu. Biocontrol potential and plant growth promotional activity of Pseudomonas fluorescence for the management of blast disease in Rice. Int J Chem Stud 2017;5(3):820-825.