Induction of resistance against Cercospora leaf spot in safflower by seed treatment with plant growth-promoting rhizobacteria |
| |
| Authors: | M. Govindappa V. Ravishankar Rai S. Lokesh |
| |
| Affiliation: | 1. Department of Biotechnology, Shridevi Institute of Engineering and Technology, Tumkur, Indiashridevi_iet@rediffmail.com;3. Department of Studies in Microbiology, University of Mysore, Mysore, India;4. Department of Studies in Applied Botany, Seed Pathology and Biotechnology, University of Mysore, Mysore, India |
| |
| Abstract: | Out of seven isolates of rhizobacteria, four strains including GBO-3, INR937a, INR937b and IPC-11 were selected as inducers of systemic resistance against Cercospora carthami and tested individually for biological control of different important seed-borne fungal pathogens. The level of control achieved by each rhizobacterium varied with the pathosystem studied. The isolates GBO-3, INR937a, INR937b and IPC-11 exhibited reduced disease intensity in terms of average number of leaf lesions as compared to untreated control in protection experiments against C. carthami. Micromobilised with rhizobacterium GBO-3, INR937a, INR937b and IPC-11 safflower seeds were grown under greenhouse and challenge inoculated with C. carthami were selected for estimation of lipoxygenase, polyphenylalanine ammonia-lyase, peroxidase, polyphenol oxidase and β-1,3 glucanase activities were estimated spectrophotometrically. Increase in all enzymes was detected in foliar extracts from plants at different stages after challenge inoculation. |
| |
| Keywords: | safflower Cercospora leaf spot induction of resistance plant growth-promoting rhizobacteria management defence enzymes |
|
|
