Effects of phytohormone seed priming on germination and seedling growth of cowpea (Vigna sinensis L.) under different duration of treatment

The experiment was undertaken with an objective to determine how the rate of seed germination and seedling growth can be influenced by various concentrations of growth regulators i.e. GA3 and IAA in cowpea. Seed moisture content was determined and found optimum for seed testing. The seeds were soaked in different concentrations (20, 40, and 60 ppm) of GA3 and IAA for 6 or 12 hours. Four replicates of each treatment with 15 seeds per replicate were arranged for precise analysis. Significant variation was found between the treatments in all aspects. Distilled water showed highest germination rate as well as the higher radicle and plumule length in contrast to other treatments. We found a drastic differences between the time soaking and the 6 hrs was more effective than 12 hrs in all aspects.