Determination of Tolerance and Sensitivity of Safflower Genotypes Based on Germination Indices and Comparison of Biochemical Contents Under Salt Stress

Safflower germination and seedling growth stages are extremely sensitive to salinity. The study aimed identify safflower genotypes' germination, responses, biochemical changes in tolerant susceptible genotypes response salt stress. Total of 28 were subjected (NaCl) treatments (0, 180, 240 mM), percentage, mean time, root lengths, vigor index the determined. genotype, treatments, interaction effects significant for seedling, parameters. length, decreased under While reduction percentage salt-tolerant was between 6-21%, it 46-65% at mM treatment. Five (Shufu, Sidwill, Finch, Yuyao, Oleic Leed) (Huaxian, Linas, 4022, Oker, Rehbein) chosen based on reductions index, proline, hydrogen peroxide, malondialdehyde (MDA) contents these investigated. proline content increased by 26 56 fold 180 concentration. peroxide treatment, but continued increase 6-50%, 10-30%. MDA genotypes, level higher (307-631%) than (103-323%) heatmap generated means showed coefficients 5 which significant. These results show that different genotypes. They could be useful selection criteria along with percentages determining stage.