Iron (Fe) is one of the essential nutrients for plant growth which is involved in several physiological functions. Hence, there are intensive efforts to improve plant tolerance to Fe deficiency, by genotypic screening and by the use of adapted physiological tools. The intend of the current study was to explore the seed priming effect with salicylic acid (SA 0.25 mM) and hydrogen peroxide (H₂O₂ 20 mM), either separately applied or combined, on plant growth, nutritional elements status (Fe and potassium K), root acidification and photosynthetic activity in two S. carnosa cultivars (Sidi Khlif and Kalbia) with different tolerance to such constraint. Under unprimed conditions, Fe deficiency decreased plant growth, chlorophyll concentration, in addition to Fe and K contents. Moreover, it affected the photosynthetic activity by inhibiting the net CO₂ assimilation rate and increasing the transpiration rate of both cultivars, following a reduced water use efficiency. The changes above described were much less pronounced in Sidi Khlif than in Kalbia. The stomatal conductance increased in Fe-deficient leaves of both cultivars, suggesting that the photosynthesis impairment should be attributed to non-stomatal factors. Interestingly, priming seeds with both agents significantly improved the growth performance and the rhizosphere acidification of deficient S. carnosa plants. However, the D+SA+H₂O₂ treatment had the most beneficial effect on S. carnosa plant growth. The degree of this stimulation may vary depending on the cultivar, the tissue and the priming agent applied. This could be owing to the photosynthetic performance modulation, leading to more efficient nutrient uptake.

铁（Fe）是植物生长必需的营养素之一，参与多种生理功能。因此，通过基因型筛选和使用适应的生理学工具，为提高植物对铁缺乏的耐受性进行了广泛的努力。本研究的目的是探讨单独施用或联合施用水杨酸（SA 0.25 mM）和过氧化氢（H ₂ O ₂ 20 mM）的种子引发对植物生长，营养元素状况（铁和钾）的影响。 K），两个食肉链球菌的根酸化和光合活性品种（Sidi Khlif和Kalbia）对这种限制的耐受性不同。在无底漆的条件下，铁缺乏会降低植物的生长，叶绿素浓度以及铁和钾的含量。此外，它在降低水分利用效率之后，通过抑制两个品种的净CO ₂同化率并提高其蒸腾速率来影响其光合活性。上述变化在西迪·赫利夫（Sidi Khlif）中远不如在卡尔比亚（Kalbia）中明显。两个品种缺铁叶片的气孔导度均增加，表明光合作用受损应归因于非气孔因素。有趣的是，用这两种试剂引发种子可显着改善缺乏的卡氏链球菌的生长性能和根际酸化植物。然而，D + SA + H ₂ O ₂处理对肉食链球菌的生长最有利。这种刺激的程度可以根据所使用的品种，组织和引发剂而变化。这可能是由于光合性能的调节，导致更有效的养分吸收。