Evaluation Of Salinity Tolerance By Leaf Synthesis Of Natural Osmoprotectants In Durum Wheat (triticum Durum Desf.) At A Juvenile Stage

Résumé: Description of the subject: The climatic characteristics of cereal-growing areas in Algeria mean that the cultivation of durum wheat (Triticum durum Desf.) is exposed to various unfavorable environmental stresses, mainly in regions with arid and semi-arid climates, including the phenomenon of salt stress, which poses a serious threat to agricultural performance and food security. Objective: In response to this major concern, the present contribution aims to explore the different biochemical abilities of durum wheat to adapt to salt stress. Methods : The study focused on three durum wheat varieties grown in Algeria (Citra, Oued Zenati and GTA Dur) at the juvenile stage, for the identification of biochemical markers of salinity tolerance, namely the content of proline, soluble sugars, total proteins and total phenolic compounds. Salinity was induced by the application of increasing concentrations of the order of (0 g.l-1, 9 g.l-1, 12 g.l-1 and 15 g.l-1 NaCl). Results : The results obtained demonstrate that under high saline power, a very significant increase in the activities of organic osmolytes compared to the control. The accumulation of the latter increases with increasing salt concentration, in the three durum wheat genotypes and for all parameters studied. Conclusion: Therefore, we notice that osmo-regulation/osmo-protection is one of the effective manifestations for tolerance to the salinity stress. In this context, the improvement of genotypes tolerant to high thresholds of soil salinity constitutes a sustainable solution for the development and adaptation of cereal cultivation.

Publié dans la revue: AGROBIOLOGIA