Plant Growth Promoting and Biocontrol Potential of Pseudomonas sp. Strains on Sorghum (Sorghum bicolor) Plant
Mounika Nagabhairava, Ali Shaik Zulfikar, Sandhya Vardharajula and Sai Shiva Krishna Prasad Vurukonda
Journal Title:Acta Scientific Agriculture
Extensive studies on the use of biocontrol agents (BCA’s) to control diseases caused by plant pathogenic microorganism, to re-duce the over usage of chemical inputs and to minimize broad use of fungicides, which leads to resistance in plant pathogens. In sustainable agriculture, plant growth promoting (PGP), and BCA’s have emerged as eco-friendly alternatives to most of the chemical pesticides. In the present study, six Pseudomonas spp. strains were screened for various PGP traits viz., Indole-3-Acetic Acid (IAA), Phosphate solubilization, siderophore activity, hydrogen cyanide (HCN) production and furthermore the strains were characterized for in vitro antifungal activity against various plant pathogenic fungi, drought, and temperature tolerance. The strains P21-ABF and P22-DSK has shown effective PGP traits and antagonistic activity against Rhizoctoniasolani and Fusariumoxysporum. The most pro-spective strains P21-ABF and P22-DSK were selected to perform in planta biocontrol studies on sorghum seeds. The most prospec-tive strain P21-ABF upon molecular characterization was identified as Pseudomonasaeruginosa.