###### Abstract
[4], under Fe deficiency conditions as well as other metals, the accumulation of such metabolites varied according to the plant ability to stimulate numerous mechanisms, in addition to the stress intensity. Phenolic compounds are claimed to be good Fe chelators, in addition to other metals, and even improve plant growth and water status, by interacting with other hormones, such as avains and gibberellins [11; 12]. Furthermore, the scientific interest focused on haplotypes has expanded in the last years under the challenge of climate alterations, due to their significant contribution in the improvement of crops adaptation in soils affected by salt. Halophytes are also traditionally consumed for their organoleptic properties. In particular, the innovative approach of the supposed \"cash crop haplotypes\" added economic incomes, ensuring food and nutrition security, in addition to fiber and industrial uses [13]. Among these halophyte species, Sulla plants constitute an important genetic contribution to pastoral production, characterized by their efficiency to water stress and soil fortification owing to their power of nitrogen fixing [14]. It has also been established that bacteria inhabiting the rhizosphere of _Sulla carnosa_ seems to be a promising source for stimulating plant growth under high salinity conditions, showing high salt tolerance and exhibiting a multiple set of plant growth promoting (PGP) activities [14]. In addition, the genus Sulla contains a variety of chemical constituents that are reputed for their biological properties [15]. At present, the majority of plant species developed for industrial and food purposes are reputed for their susceptibility to environmental constraints. To overcome this difficulty, farmers stopped using Fe(III)chelates, which are very expensive and harmful to the fertile soil [16]. According to many studies, the application of the priming seeds technique can be considered an alternative approach for providing optimal plant growth and crop yield while respecting the environment [17]. Among the efficient priming compounds, salicylic acid (SA) has been the most studied. Indeed, SA is an endogenous growth regulator belonging to the group of phenolic compounds. It is greatly involved in the improvement of seed germination performance in addition to the fruit yield [18]. Besides, SA is associated to the enhancement of plant tolerance to different abiotic stresses such as salinity and nutrient deficiency, including Fe [18; 19; 20]. Recent investigations [20] showed that the pretreatment of seeds with SA and/or H\({}_{2}\)O\({}_{2}\) enhanced tolerance to low Fe supply in _S. carnosa_ plants, with the effect being partially dependent on the agent applied, genotype, and tissue. However, to our knowledge, the effect of SA seed priming on the phenolic c composition and their related biological activities of _S. carnosa_ under low Fe supply remain unknown. Thus, this study aims to shed light on the impact of SA seed priming on the phenolic profile in tissues of both varieties Sidi Khlif (SK) and Kalbia (KA) of the endemic Tunisian halophyte _S. carnosa_, as well as the antioxidant effectiveness of this species. Earlier investigation showed different physiological behavior of both varieties under low Fe supply [21]. In this work, we assess the effect of low Fe supply combined with SA seed priming on the (i) bivalent Fe and MDA contents (indicator of oxidative stress and Fe status, respectively), (ii) phenolic composition, and (iii) antioxidant activities.