Water relations and growth vigour ofVigna sinensisplants in relation to indole acetic acid, gibberellic acid or kinetin

The objective of this study was designed to investigate the effect of seed priming with different concentrations of growth bioregulators ( i.e. indole acetic acid, gibberellic acid or kinetin) on growth and water relations of Vigna sinensis plants throughout various stages of plant growth and development.In the majority of cases, indole acetic acid, gibberellic acid or kinetin at different concentrations stimulated the growth vigour of cowpea plants (root length, root fresh and dry weight, shoot length, shoot fresh and dry weights and leaf area production) all over the growth periods.Seed pretreatment with IAA or kinetin induced significant increases in total leaf conductance and transpiration rate that was accompanied by a decrease in RWC. On the other hand, GA 3 induced reverse situation in these parameters.