Growth parameters and hormonal constituents of vicia faba seedlings grown from uniconazole soaked seeds

ABSTRACT

Pot experiments were conducted during two successive growth seasons to study the effect of treating Vicia faba seeds [cv. Giza 402] with uniconazole at concentrations 0, 5, 10, 20 or 40 ppm on the growth parameters and the natural hormone content of the produced seedlings. The treatments reduced plant height, number of leaves, fresh and dry weights of the shoot system; the decrements were often significant at 1% level of probability and in a linear relationship with the used concentrations of uniconazole. IAA and GA-like substances [either in the form of free or water-soluble bound] were decreased while ABA was increased in the seedlings produced from treated seeds compared to those raised from untreated ones. The decrements and increments in the hormonal constituents were directly proportional with the concentration of uniconazole