Effect of glutathione and ascorbic acid on some physical characteristics of seedlings of grape plant Halawani cultivar Vitis vinifera L.
Abstract
This experiment was conducted in the saran-covered plastic house of the College of Agriculture and Marshes, Thi-Qar University, on 20.02.2022, to study the effect of spraying with glutathione and ascorbic acid on the physical and chemical properties of the grape plant Vitis vinifera L at one year age. The effect of glutathione compound at four concentrations (0, 75, 150, 225) mg.l-1 and ascorbic acid at four concentrations also (0, 50, 100, 150) mg.l-1, and the interaction between them was studied and implemented as a factorial experiment with two-factors (4×4×3) by following the randomized complete block design (RCBD) with three replications (48 seedlings per replicate). The averages were tested using the Revised least significant difference R.L.S.D at the probability level of 5%. The most important results obtained indicate that the effect of spraying with glutathione significantly on the studied vegetative characteristics, where the spraying treatment (G3) with a concentration of (225 mg l-1) was significantly superior to the control treatment (G0) in(Stem diameter, number of branches, dry weight, wet weight), which gave the highest averages, respectively ((24,901 mm, 7.942 branches. plant-1, 1.596 g, 0.403 g, 20.903), respectively. As for ascorbic acid, its effect was significant. In the studied vegetative traits, the spraying treatment (3C) with a concentration of (150 mg.L-1) was superior in (plant height (cm), number of leaves (leaf. plant-1), leaf area (cm2), which gave the highest averages, respectively ( 25.110 mm, 25.110 mm, 7.509 branches. plant-1,1.649 g, 0.392, 20.767).As for the two interactions (glutathione + ascorbic acid) at a concentration of (225 mg.l-1 + 150 mg.l-1), the treatments showed clear statistical differences, as the treatments excelled in the vegetative and chemical characteristics (stem diameter, number of branches, wet weight, weight). Dry, chlorophyll content of leaves) was a significant effect on the control treatment
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