Growth evaluation of some grape cultivars and rootstocks under saline stress conditions

Field experiments of this study were carried out at the Agricultural ýExperiments Desert research Station, Faculty of Agriculture Cairo ýuniversity located at Wadi El-Natroon, Behera Governorate Egypt ýduring the two successive seasons (2007 and 2008). The first experiment ýhad conducted on one year old of grapevines cultivars (Roumi Red ýFlame Seedless Thompson Seedless and Crimson Seedless) and ýrootstocks (Salt Creek 1103Paulsen Freedom and Teleki 5C). The aim ýof this experiment was to evaluate their growth under saline irrigation ýwater (2640 ppm). Generally grape cultivars gave the highest vegetative ýgrowth values (leaf area shoot length shoot diameter and dry weight) ýcompared to rootstocks under studied conditions. While Salt Creek and ýý1103Paulsen grape rootstocks gave the best leaf transpiration rate and ýstomatal diffusion resistance. The same rootstocks were excluded the ýuptake of chloride and sodium and their transportation to upper ýdifferent plant organs. The second experiment was to evaluate the ýresponse of two grapevine rootstocks to some salt tolerance treatments. ýThis experiment had conducted on one year old grapevine rootstocks ýSalt Creek (Vitis champini) and 1103Paulsen (V. berlandieri x V. ýrupestris) nurslings with or without some soil application treatments ýincluding humic acid Uni-Sal sulphur and mycorrhizae under the same ýsaline water irrigation. The obtained results indicated that Salt Creek ýrootstock recorded the highest significant shoot length leaf area leaf ýnumber root length total plant dry weightleaf transpiration rate and ýroot Ca content and it had a significant reduction in stomatal diffusion ýresistance (SDR) compared to 1103Paulsen rootstock. Whereas ýý1103Paulsen had the best values for plant survival percentage leaf ýproline content leaf and shoot CI and Na contents. Moreover Uni-Sal ýtreatment gave the highest significant shoot length leaf area root ýlength plant dry weight leaf chlorophyll content transpiration rate ýplant K percentage and reduced significantly SDR and leaf Na ýpercentage. Furthermore Salt Creek rootstock with Uni-Sal treatment ýgave the best results.ý