Differential responses of two rice varieties to salt stress |
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Authors: | N Ghosh M K Adak P D Ghosh S Gupta D N Sen Gupta C Mandal |
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Institution: | (1) Plant Physiology and Plant Molecular Biology Research Unit, Department of Botany, University of Kalyani, Nadia, Kalyani, 741235, West Bengal, India;(2) Department of Botany, Bose Institute, Kolkata, 700009, West Bengal, India; |
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Abstract: | Two rice varieties, viz. Nonabokra and Pokkali, have been evaluated for their responses to salinity in terms of some physiological
and biochemical attributes. During the exposure to salinity (200 mM concentration of sodium chloride for 24, 48, and 72 h),
a significant increase in sodium was recorded which was also concomitant with the changes of other metabolic profiles like
proline, phenol, polyamine, etc. The protein oxidation was significantly increased and also varied between the two cultivars.
The changes in activities of anti-oxidative enzymes under stress were significantly different to the control. The detrimental
effects of salinity were also evident in terms of lipid peroxidation, chlorophyll content, protein profiles, and generation
of free radicals; and these were more pronounced in Pokkali than in Nonabokra. The assessment and analysis of these physiological
characters under salinity could unravel the mechanism of salt responses revealed in this present study and thus might be useful
for selection of tolerant plant types under the above conditions of salinity. |
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