BIOCHEMICAL STUDIES ON THE EFFECT OF GA3 AND IAA ON BIOCHEMICAL CONSTITUENTS OF VICIA FABA. - .

A Field experiment was conducted to study the effect of foliar spraying with plant growth regulators treatments i.e. gibberellic acid (GA3) and Indole acetic acid (IAA) at control, 100 ppm GA3, 100 ppm IAA and 100 ppm GA3+100 ppm IAA on the yield and biochemical constituents of some promising faba bean (Vicia faba L.) cultivars i.e. Nubaria 1, Misr3 and Giza 716. Foliar application with GA3 and IAA treatments had positive effect on the yield of seeds, but using a mixture of both hormones are more effective than the using of a single hormones in case of three studied cultivars.. All the used Plant growth regulators (PGRs) caused significant increased the content of total sugar, protein, total carbohydrates, total nitrogen content and seed yield in all treatments.. All the used Plant growth regulators (PGRs) caused significant increase in the protein and total carbohydrate percentage of the produced seeds resulted from the treated plants. The highest values of protein and carbohydrate were found in Nubaria 1 seed treated by the foliar spraying at 100ppm GA3+IAA. The consumed periodate for each glucose unit decrease as foliar application of GA3 or IAA treatments. Formic acid was slightly decreased by all treatments except when applied GA3 treatment. All treatments increased contents of P, K, Ca and Mg in seeds, but Na contents was decreased in seeds of vicia faba plants. - Seemore at: .