Genotypic responses of rice under salinity and high temperature stresses on seed germination and seedling growth

Seeds of four different rice genotypes (Kharaganja, Shua-92, IR-9 and FL-478) were exposed to increasing concentrations (0, 50, 75 and 100mM) of NaCl and (30 and 380C) temperature, to investigate the genotypic responses of rice under salinity and high temperature stresses on seed germination and seedling growth. There was a regular decrease in seed germination and seedling growth raised in plastic bowls for ten days with increasing salt concentration and temperature. Highest germination and seedling growth was observed in Kharaganja and FL-478 as compared to Shua-92 and IR-9. It was concluded on the basis of growth characteristics that all the genotypes indicated more sensitive to high temperature stress (38oC) with increasing salinity levels.