Abstract
The fungal disease, charcoal root rot, caused by Macrophomina phaseolina is a foremost yield restraining factor of Sorghum bicolor L. around the world. The expression analysis of genes induced in general defense response can endow with clues to reveal major defense mechanisms against pathogen infection in sorghum plant. The role of chitinase and Stilbene synthase in response to M. phaseolina in sorghum was studied under control growth conditions using a real-time polymerase chain reaction. Here, we report the expression analysis of antifungal genes in two cultivars viz. PJ-1430 (resistant) and SU-1080 (susceptible) at different hours after inoculation with M. phaseolina isolate MTCC 2165. Chitinase and stilbene synthase were induced in PJ-1430 within 0 h, 24 h and in SU-1080 in 48 h, 24 h, respectively, after inoculation. However, the expression levels of chitinase and stilbene synthase in resistant cultivar were significantly higher. The results showed that chitinase and stilbene synthase can be effective to enhance resistance to M. phaseolina.
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