Differential response of indica rice genotypes to NaCl stress in relation to physiological and biochemical parameters

Authors: Kumar, Vinay¹; Shriram, Varsha¹; Jawali, Narendra²; Shitole, Mahadev Ganpat¹

Source: Archives of Agronomy and Soil Science, Volume 53, Number 5, October 2007 , pp. 581-592(12)

Publisher: Taylor and Francis Ltd

Abstract:

The effect of NaCl stress was studied in indica rice cultivars, Panvel-3 (tolerant), Kalarata (moderately tolerant) and Karjat-3 (sensitive) under various levels (50 - 300 mM) of salinity besides control (0 mM). Salinity stress decreased germination percentage, plant growth, biomass production and chlorophyll pigments, and increased malondialdehyde level (lipid peroxidation) and free proline accumulation. Salinity-induced decrease in germination percentage, biomass production, chlorophyll and total protein contents were significantly higher in Karjat-3 than Panvel-3. The free proline content at all the levels as well as the magnitude of increase in accumulation with increasing salinity was also highest in Panvel-3, as at 300 mM NaCl concentration, it was 8 times more than control, while it was about 5 times more in Karjat-3 and around 4 times in Kalarata. The level of lipid peroxidation was lowest at all levels of salinity in Panvel-3 as compared with Karjat-3, however, Kalarata showed intermediate results. Results showed salinity tolerance of Panvel-3 was manifested by lower decrease in germination, plant growth and chlorophyll pigments and associated with higher proline accumulation and lower lipid peroxidation under high salinity stress.

Keywords: NaCl stress; proline; lipid peroxidation; chlorophyll; biomass

Document Type: Research article

DOI: http://dx.doi.org/10.1080/03650340701576800

Affiliations: 1: Department of Botany, University of Pune, Ganeshkhind 2: Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai, India

Publication date: 2007-10-01

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