الفهرس 
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Abstract
This study was carried out during 2015 and 2016 seasons on sixty uniform in virgour 12 years old Red Roomy grapevines (on own rooted). The vines are planted at 2 x 2 meters apart. The selected vines were pruned on the first week of Jan. during both seasons using head pruning system leaving 72 eyes/vine (on the basis of 20 fruiting spurs 3 eyes plus 6 replacement spurs x 2 eyes). Surface irrigation system using Nile water was followed. The texture of the tested soil is clay.
The purpose of this study was elucidating the effect of single and combined application of the antioxidant glutathione and chitosan at different concentrations on vegetative growth characteristics, vine nutritional status, yield, berries colouration %, shot berries %, as well as quality of the berries of Red Roomy grapevines grown under Minia region conditions.
The obtained data subjected to statistical analysis using Randomized complete block design (RCBD) which the present experiment included ten treatments, replicated three times, two vines per each.
This study included the following ten treatments:
1- Control (untreated vines).
2- Spraying the vines with glutathione at 0.025 % (0.25 g/L).
3- Spraying the vines with glutathione at 0.05 % (0.5 g/L).
4- Spraying the vines with glutathione at 0.1 % (1.0 g/L).
5- Spraying the vines with chitosan at 0.05 % (0.5 g/L).
6- Spraying the vines with chitosan at 0.1 % (1.0 g/L).
7- Spraying the vines with chitosan at 0.2 % (2.0 g/L).
8- Spraying the vines with glutathione at 0.25 % + chitosan at 0.05 %.
9- Spraying the vines with glutathione at 0.05 % + chitosan at 0.1 %.
10- Spraying the vines with glutathione at 0.1 % + chitosan at 0.2 %.
Each treatment was replicated three times, two vines per each. Glutathione and chitosan were sprayed (1st week of Apr.), just after berry setting (1st week of June) and at one month later (1st week of July). Triton B as a wetting agent was used at 0.05 % and the vines received glutathione and chitosan solutions till runoff.
Conclusion:
Under the experimental and resembling conditions, it is necessary for treating Red Roomy grapevines three times (growth start, just after berry setting and 30 days later) with a mixture of glutathione at 0.05 % and chitosan at 0.1 % for promoting growth, vine nutritional status, yield, berries colouration and berries quality and decreasing shot berries.