Evaluation of Salinity Effects on Ionic Balance and Compatible Solute Contents in Nine Grape (VitisL.) Genotypes

Comparative effects of deficit and partial root-zone drying irrigation techniques using moderately saline water on ion partitioning in Shiraz and Grenache grapevines

“…The concentration of Na + consistently remained lower than the Cl − concentration in all vine structures which contradicts recent work by Mohammadkhani et al (), who found higher Na + accumulation than Cl − in all vine structures tested of nine tablegrape genotypes. They surmised these vines had adapted to salinity because of their ecological conditions (which included living around Urmia salt lake, Iran), as the high Na + concentration had not affected their growth.…”

“…The use of moderately saline irrigation water and varying the way it is applied to the soil do affect the partitioning of ions throughout a grapevine. The high leaf Cl − concentration found in the deficit treatments shows a different level of hierarchy to that of previous work (Fisarakis et al , Tregeagle et al , Mohammadkhani et al ). Fisarakis et al () demonstrated that the roots of own‐rooted Thompson seedless grapes had the highest Cl − concentration, followed by the petioles and then laminae.…”

“…Fisarakis et al () demonstrated that the roots of own‐rooted Thompson seedless grapes had the highest Cl − concentration, followed by the petioles and then laminae. Tregeagle et al () also showed higher Cl − concentration in roots than in petiole and lamina of rooted leaves of two rootstock cultivars, while Mohammadkhani et al () reported that the shoots of various grapevine genotypes had the highest Cl − concentration followed by roots and then lamina regardless of salt concentration. The control treatment of our experiment showed the distribution observed by Fisarakis et al () and Tregeagle et al () (Tables , ) and may have been due to the ‘dilution effect’ on Cl − concentration with the leaf area being much larger than that of the two deficit treatments (Figure ).…”

“…Stomatal conductance shows a similar response when vines are placed under saline stress (Prior et al ) although the response is not always straightforward because of variation between leaves, or differing salinity (Ben‐Asher et al ). The reduction in stomatal conductance is due in part to the osmotic stress experienced by the vine roots when exposed to saline irrigation water (osmotic potential = −0.97 MPa) causing a lowering of the water potential and loss of cell turgor (Mohammadkhani et al ). The lack of difference in stomatal conductance between the RC and PRD treatments (Figure ) and the significant difference of Ψ m between the PRD and C treatments (Figure ) contradict previous PRD research as stated previously.…”

Salinity effects on expression of some important genes in sensitiveand tolerant grape genotypes

“…In previous experiments we screened 18 grape genotypes from the viewpoint of salt-tolerance parameters (Mohammadkhani et al, , 2014. Genotypes with lower (GhezelUzum and Shirazi) and higher (H6 and Gharashani) capacity for salinity tolerance were selected for molecular analysis.…”