Growth Parameters, photosynthetic pigments and mineral ions content of vicia faba plants treated with uniconazole

Growth parameters [viz. stem length, number of branches and leaves, fresh and dry weight of the shoot system as well as the water content of the shoot and its percentage], photosynthetic pigments [viz. chlorophyl a, chlorophyl b and carotenoids] and the mineral ions content [viz. K, Ca and Mg] of bean [Vicia faba cv. Giza 402] plants sprayed twice [after 4 and 6 weeks from sowing] with solutions of uniconazole [at the concentrations 0, 5, 10, 20 or 40 ppm] and collected after 5 and 7 weeks, were studied. The treatments decreased most of the studied growth parameters at the 2 investigated ages, the decrements were almost directly proportional with the concentration used of the growth regulator and it was sometimes significant at 1% or 5% levels of probability. Increases in photosynthetic pigments and mineral ions content occurred due to the treatments, the increments were in a linear relationship with the concentration used, these increments were often significant at 1% or 5% levels of probability and they were more pronounced at the 1st investigated age

Growth flowering and productivity of vicia faba plants treated with uniconazole

A pot experiment was carried out during the growth season 1991/92 and repeated during the growth season 1992/93 to study the effect of spraying bean plants twice, during vegetative growth, with solutions of uniconazole [at concentrations of 0, 5, 10, 20 or 40 ppm] on the growth parameters [plant height, rate of stem elongation as well as number of branches and leaves], flowering, yield components [number and weight of pods and number and weight of seeds, all per plant, as well as the weight of 100 seeds] and the chemical composition of the harvested seeds. The treatments significantly decreased plant height and inhibited the rate of stem elongation, especially during the 2 or 3 weeks [according to the concentration used] following the treatment, the decrements were in a linear relationship with the concentration used. The average number of branches leaves [all per plant] and days required for the appearance of the first flower were increased due to the treatments. The increments were only significant with the first criterion after the second application of uniconazole. All the concentrations used [except that of 40 ppm] caused significant increases in the yield components, the best results were obtained with 20 ppm

Reactions of bean [vicia faba L cv Giza 2] plants to low temperature treatments of the seeds: I effect on the endogenous hormones of the seedings

What coleoptile section bioassay test and lettuce hypocotyl bioassay test of chromatograms [in one solvent system and two solvent systems respectively] were used for hormonal analysis of extracts of bean [Vicia faba L. cv. Giza 2] seedlings produced after 2-weeks, 4-weeks or 6-weeks seed treatment at 5 degree +/- 1.0 degree and compared with those of seedlings raised at room temperature [about 25 degree]. The treatments caused decrease in the auxins content and increase in the GA-like substances content, the differences were directly proportional to the length of the treatment period. Four and six-weeks periods of treatment greatly increased the amount of ABA in the extracts of the seedlings