Author (s): M. A. Razzaque1, N. M. Talukder2, A. K. Bhadra3 and M. A. Baset Mia4


The effect of salinity on germination and mineral content in seedlings of 30 rice genotypes along with one standard check salt tolerant rice cultivar Pokkali were assessed under 5 levels of salinity (0, 4, 8, 12 and 16 dS m-1)] using completely randomized design with three replications in pot culture. The results of this study indicated that significantly the higher % germination was found in the genotypes Bina5, Atomita4 and PNR381 (94.67%) whereas, the lowest (80%) in NS15. But the highest germination rate (GR) (0.324 seeds day-1) was found in NS18 whereas, the lowest (0.156 seeds day-1) was observed in NS16 followed by NS15 (0.177 seeds day-1). The lower salinity (0 to 4 dSm-1) levels did not significantly affect on percent germination. A significant reduction in germination was found at 8 dSm-1 level of salinity. The concentration of Na+, Ca2+ and Mg2+ in seedlings irrespective of genotypes significantly increased due to increasing the salinity. K+ content and K+/Na+ ratio in rice seedlings significantly decreased with increasing the salinity levels. The highest concentration of Na+ (2.373%) was found in genotype NS15 followed by Bina Pok (2.222%) and RD21 (2.183%) whereas, the lowest (1.336%) in PNR519, PNR381, PVSB19 and PVSB9. K+ and K+/Na+ ratio in rice seedlings differed significantly due to genotypes. The higher concentration of K+ was found in Pokkali (1.137%) and PVSB9 (0.936%), but the highest K+/Na+ ratio (4.57) in PVSB9 followed by PVSB19 (3.41). The genotype NS15 contained the lowest amount of K+ (0.615%) and K+/Na+ ratio (0.88). So, the genotypes Pokkali, PVSB9, PVSB19, PNR519 and PNR381 were designated as salt tolerant whereas, NS15, RD21, Bina Pok as salt susceptible.

J. Expt. Biosci.1(1):1-6, January 2010
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1Associate Professor, Dept. of Agricultural Chemistry & 3Associate Professor, Dept. of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207; 2Professor, Dept. of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh; 4Professor, Dept. of Crop Botany, Bangbandhu Sheikh Mujibur Rahman Agricultural University, Gazipur.
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