Effet d’eau de mer sur deux paramètres hydriques (turgescence et transpiration) de jeunes plants d’Atriplex canescens (Effect of seawater on two water parameters (turgescence and transpiration) of young plants of Atriplex canescens)

Two hydric parameters were studied in this work, in relation with salt stress tolerance, i.e. turgescence and transpiration, in young plants of Atriplex canescens. We determined the relative water content (RWC or TRE) or turgescence and relative water loss by transpiration (RWL). For this, we tested the action of sea water at 50% and sea water at 100 %. The results after a week of stress show that: the salinity has a highly significant effect. Moreover, whatever the studied parameter (turgescence, transpiration), the values are increased in the presence of the nutritive solution only. If the salt concentration exceeds 50% sea water, these parameters decrease and the salt is harmful. Results also showed the existence of a close relationship between these parameters. Thus, when the relative water content (RWC) decreases, there is a gradual decrease in water loss (RWL) transpiration, characterized by stomatal closure.