PJB-2017-780
CARBON ISOTOPE DISCRIMINATION, GRAIN YIELD, MINERAL AND BIOCHEMICAL CONTENT OF BARLEY “ARDHAOUI” UNDER DEFICIT IRRIGATION WITH SALINE WATER IN SOUTHERN TUNISIA
MOHAMED BAGUES
Abstract
Two barley accessions cultivated under drought and saline stress conditions in Southern Tunisia were defined screening their characteristics basically water use efficiency in grain (WUEG), carbon isotope discrimination (∆13C), grain yield (GY), ash content (Ma), biochemical content (proline, sugar, MDA) and mineral composition. Three saltwater regimes was used (T0: 100-ETc, T1: 75-ETc and T2: 50-ETc). Deficit irrigation with saline water enhanced significantly proline and soluble sugar contents, versus a relevant decrease of leaf ∆13C as well as leaf Ma. Vigorous positive affinities were established between leaf ∆13C, soluble sugar and MDA contents. Nevertheless, proline content and WUEG were negatively correlated with leaf ∆13C. At heading stage, GY and leaf Ma interacted positively with leaf ∆13C. For GY, this substantial interrelation was noticed only at stressed conditions T1 and T2. As an additional outcome, a high relationship was detected between leaf ∆13C and mineral content. Overall, this study suggests that leaf Ma can be assumed alternately as a suitable scale of ∆13C in barley under saline water stress conditions.
To Cite this article:
Download
