Effect of glutathione and ascorbic acid on some physical characteristics of seedlings of grape plant Halawani cultivar Vitis vinifera L.

الملخص EN

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.1¹ and ascorbic acid at four concentrations also (0, 50, 100, 150) mg.1¹, and the interaction between them was studied and implemented as a factorial experiment with two-factors (4x4x3) 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 1¹) was significantly superior to the control treatment (GO) 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.1-1 + 150 mg.1-1), 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