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Paper Details

Application of exogenous proline to improve the seawater tolerance among Egyptian and Saudi wheat (Triticum aestivum L.) genotypes during early growth stages.

Omar Abdel-Hakeem Almaghrabi1 and EhabMohamed Rabei Metwali1&2*

Journal Title:Journal of Chemical, Biological and physical sciences

An experiment was conducted to assess the ameliorative effect of exogenous compatible solutes, such as proline, on growth of four Egyptian genotypes (Masr1, Sakha93, Sed12, Giza168) and other four Saudi genotypes (Madini, Yamanei, kassemi, Taboki) growing under salinity stress. One week old seedling were subjected to different concentrations of diluted seawater at (3000 and 6000 ppm) supplied or not with exogenous proline at 2.00 mM and 4.00 mM. Partitioning of leaf area, water amount, degree of leaf succulence, degree of leaf sclerophyll and shoot distribution were investigated. All traits, except degree of leaf sclerophyll, decreased with salt stress in all genotypes, and the decreases being more pronounced in Sed12 and Taboki, while Sakha9, Masr1 and Madini were less effective. Applied of proline at higher level (4.00mM) was found to more effective to ameliorate the adverse effect of seawater at both levels (3000 and 6000 ppm) than lower level of proline (2.00mM) at the same levels of seawater treatments. In contrast leaf area, water amount, degree of leaf sclerophyll can use as selectable parameters to distinguish among tolerant and sensitive genotypes under seawater stress.