tailieunhanh - Impact of bacterization of rhizobium and methylobacterium radiotolerans on germination and survivability in groundnut seed

Groundnut contributes 40% of the total oil seeds production in the country. Groundnut is a rainfed crop in kharif season with least productivity. Hence an attempt was made for improving the abiotic stress resistance of plants through seed bacterization with biological agents. The present study was undertaken to examine the impact of bacterization of Rhizobium and Methylobacterium radiotolerans to enhance groundnut germination rate and vigour index. The results showed that groundnut showed higher response to TNAU 14 rhizobial strain, is a common feature with significant increase in germination percentage (100%) and vigour index (4098). The result of the present study indicate that root colonization ability of the phyllosphere bacterium individual strain had higher influence on the shoot length ( cm plant-1 ), root length ( cm plant-1 ) and seedling length ( cm seedling-1 ), when compared to co-inoculation and individual inoculation with Rhizobium. Seed survivability of bioinoculants after bacterization showed, M. radiotolerans had extended survival upto 196 h when compared to combined inoculation upto 96 h. The lowest survival was observed in Rhizobium treated seeds up to 72 h. Further the experiment also revealed that M. radiotolerans could have the ability in inducing the induced systemic resistance activity (ISR) in against groundnut seed borne fungal pathogen. | Impact of bacterization of rhizobium and methylobacterium radiotolerans on germination and survivability in groundnut seed