National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Ten pearl millet genotypes differing in their drought sensitivity were evaluated at seedling stage for drought tolerance through physiological and biochemical criteria to understand the beneath mechanism of drought tolerance. The main purpose of this work was to screen the highly tolerant and susceptible genotypes under PEG-6000 induced drought stress. A laboratory experiment was conducted in a randomized complete block design, drought stress was induced in seedling on 15th day of germination by exposing them to different stress levels i.e. T1 (Control); T2 (6% PEG) and T3 (8% PEG) for 6 hours. A comparative analysis of different pearl millet genotypes revealed that the tolerant genotypes was superior over the susceptible genotypes in terms of leaf water relations (RWC), membrane stability (MSI), osmolytes accumulation and lipid peroxidation (MDA). Simple correlation coefficient analysis revealed significant positive association of RWC at 0.01% level with MSI and GB. While the proline and MDA were significantly and negatively correlated with RWC. On the basis of these results we have chosen J-2549 as susceptible and J-2454 as tolerant genotype for drought stress. This analysis clearly showed that maintenance of higher membrane stability, plant water status and accumulation of compatible solutes play an important role in plants tolerance under drought conditions.
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