Author(s):

Ankit Singh, Reeshu Singh, Anubhuti Singh, Alok Kumar Singh and AK Singh

Abstract: In the present study deals with the Oryza sativa L was selected for the physiological and biochemical studies in laboratory condition for 10 days (2nd, 4th, 6th, 8th and 10th day) that were carried under different salinity levels. Six genotypes of rice crop i.e. tolerant- CSR-36, CSR-43, Usar Dhan-3 and Susceptible- Swarna Sub-1, IR-28, Pusa-44. were used to germinate under varying concentrations of NaCl i.e.0 to 100 mM. The salt stress significantly reduced the germination percentage with increasing salt stress from 0 to 100 mM NaCl. A continuous decrease in carbohydrate content with increase in salt stress was observed in all the varieties. The rate of proline accumulation was observed maximum in Usar dhan-3 at 100 mM NaCl stress. The enzymetic activity of catalase and α-amylase was higher in control than sample induced with salinity stress. This study overall showed better tolerance to salt stress with a lesser extent of antagonistic effect of NaCl on Usar dhan -3 than any other variety.

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