The effect of salinity and seed size on seed reserve utilization and seedling growth of soybean (Glycin max)

This experiment was conducted to evaluate seed size (large, medium and small) and salinity (0, 30 and 60 mM and 0, 9×10-4 and 18×10-4 pa) effects and their interactions on germination traits and seedling growth of soybean cv. KATUL. It was done as factorial experiments in the base of completely randomize design with 3 replications in seed physiology and technology laboratory of Mohaghegh Ardabili University in 2011. In this experiment coefficient of velocity of germination (CVG) and germination percent, homogeneity, seedling dry weight, reserve mobilization and its efficiency were examined. According to results, increasing seed size decrease germination uniformity significantly. Salinity decreased seedling dry weight, mobilized reserves and its efficiency, significantly, but it hadn’t significant effect on germination percent, uniformity and CVG. Also interaction effect of salinity and seed size had significant on germination uniformity, seedling dry weight, mobilized reserves and it’s efficiency. This experiment showed that small seeds had better germination uniformity and getting reserves more and faster than larger ones to seedlings.