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

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

Growth parameters, photosynthetic pigments and mineral ions content of bean [vicia faba cv Giza 402] plants raised from pre-sowing uniconazole soaked seeds

Growth parameters [represented by stem length, number of branches and leaves, fresh and dry weight of shoot system as well as the water content and its percentage in the shoot], photosynthetic pigments content [viz. chlor. a, chlor. b and carotenoids] and the mineral ions content [viz. K, Ca and Mg] of Vicia faba [cv. Giza 402] plants raised from pre-sowing soaked seeds in the following concentrations of uniconazole 0, 5, 10, 20 or 40 ppm and collected after five and nine weeks from sowing were studied. The treatments reduced all the studied growth parameters at the two ages investigated. The decrement was often directly proportional with the concentration used of uniconazole and it was almost significant at 1% level of probability. The only exception of this was that at the second studied age, increase in the average number of branches and levels was observed with the treatments and it was sometimes significant at 5% level of probability. The treatments caused increase in the photosynthetic pigments which was more obvious after five weeks from sowing while after nine weeks from sowing the increment in this criterion was restricted to the two higher concentrations used [20, 40 ppm]. Mineral ions contents [viz. Ca, K and Mg] of bean shoots were increased in comparison with control plants, the increase were directly proportional with the concentration used of uniconazole and it was almost significant at 1% level of probability