الفهرس 
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Abstract
The present study included two experiments conducted during 2014 s s / 2015 and 2015 / 2016 seasons, to study the response of grafted and non-grafted on cucumber plants under salinity conditions. Commercial cultivar of cucumber ”Eshrak” were used on its own roots or grafted on five rootstocks (Shintoza, Ferro, Pumpkin, Bottle gourd and Squash). The grafted seedling and control (non-grafted) were transplanted under low plastic tunnels condition. Experiment was carried out to evaluate the effect of these grafted and non-grafted cucumber plants under salinity conditions on the growth, yield and fruits quality. This study gives more options for cucumber growers by increasing their ability to use low quality of irrigation water with substantial plant production. Our result indicated that certain rootstock genotypes such as Shintoza and Ferro were able to tolerate high salt. The effects of grafting proved to improve plant production under salinity water.
The following represents a brief resume of the obtained results.
Effect of grafting on vegetative growth of cucumber
1- The original rootstocks were superior to the domestic ones for enhancing vegetative growth characteristics of plant cucumber. Among the original rootstocks, it was obvious that rootstock Shintoza and Ferro exceeded other rootstocks.
2- Grafted plants showed higher significant positive effects on vegetative growth parameters compare with non-grafted plants. where using Shintoza and Ferro rootstocks increased the stem length, stem diameter, branches number, leaves number, leaf area, fresh and dry weights of shoots compare with non-grafted plants.
3- Leaf chlorophyll content of cucumber plants affected positively and significantly through grafting on the experimental rootstocks belonged Shintoza and Ferro rootstocks.
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SUMMARY AND CONCLUSION
Saudi M.M. Abd-El-Latif (2019), Ph.D., Fac. Agric., Ain Shams Univ.
Effect of grafting on fruit yield and its components.
1- Yield in terms of (average fruit weight, number and weight of fruit per plant) were also significant affected by the rootstocks.
2- Shintoza and Ferro rootstocks produced significantly higher yield components than all other used rootstocks and non-grafted plants.
3- The highest total yield was obtained by grafting cucumber plants on Shintoza rootstock followed by grafting on cv. Ferro rootstock by 130 % and 73 %, in the first season and 160% and 147 %, in the second season respectively as compared with ungrafted cucumber plants.
Effect of grafting on Chemical composition of plant foliage.
1- The data proved to significant increase in leaves and plant chemical contents in grafted plants compared to non-grafted ones.
2- The lower concentration of Na % and Cl % recorded in shoots of the grafted plants on Shintoza rootstock compared to non-grafted plants.
3- All graft combinations accumulated more Na in their roots than un-grafted plants. These findings, along with the detected higher proline content in the grafted plants (Eshrak/Shintoza) may explain the relative tolerance of these plants to salinity stress. Therefore, the characteristics of the rootstock determine its tolerance to salt stress.
4- The highest leaf relative water content percentage was recorded in grafted cucumber plants on Ferro without significant differences with squash cv. in the first season and with Shintoza in the second season. The lowest percentage of leaf relative water content was obtained with ungrafted plants (control) in both seasons.
5- The highest percentage of membrane permeability was recorded with ungrafted cucumber plants (Control), Eshrak/Pumpkin, Eshrak/Bottle gourd and Eshrak/Squash with no significant differences among them in the first season while in the second season; the highest percentage was shown with ungrafted cucumber plants as compared to all graft
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SUMMARY AND CONCLUSION
Saudi M.M. Abd-El-Latif (2019), Ph.D., Fac. Agric., Ain Shams Univ.
combinations except Shintoza. The lowest percentages were observed with grafted cucumber on Shintoza in the first season and with grafted cucumber on Ferro in the second season.
3. Effect of grafting on physical quality of fruits.
1- Fruit quality expressed as, fruit length, average fruit volume and firmness were positively affected by Shintoza rootstock while no significant effect could be detected regarding other parameters as fruit diameter.
2- The highest values of firmness were recorded in Eshrak/Shintoza in two growing seasons without significant differences between it and Eshrak/Ferro in the first season.
3- The highest concentration of total soluble solids (TSS) was recorded in Bottle gourd and Pumpkin rootstocks.
4- With respect of taste goldsmith in fruit, the highest value recorded in Eshrak/Ferro in the first season and it was with Eshrak/bottle Gourd in the second season.
5- Concerning crispness in fruit, the highest value recorded on Eshrak/ Ferro in the first season and it was Eshrak/Shintoza, Eshrak/Ferro, Eshrak/ Bottle Gourd and Eshrak/Squash without significant differences in the second season.
6- Concerning chewing in fruit, the highest value was recorded with ungrafted Eshrak and Eshrak/Ferro in the first season and it was with all other treatments except Eshrak/pumpkin in the second season
CONCLUSION
The conclusion can be clearly as followed
1- It can be recommended to use Shintoza as rootstock which proved to be compatible with Eshrak cultivar and it tolerant to high salinity. Also it was the most superior rootstock in its effect on cucumber plant growth and production parameters.
2- It can be recommended to use local varieties such as bottle gourd, pumpkin and squash because it is cheap.
3- Farmers should be resistance rootstocks selection for solving cultivation problems for them be curfuly there are compatibility between the rootstock and the scion.