Salicylic acid (SA) has an important role in drought-tolerance in wheat (Triticum aestivum L.) but its relevance to the salinity-tolerance is not well understood. In the present study, possible roles of SA and salinity responses were examined using two wheat cultivars i.e., drought-tolerant Sakha-69 and drought-sensitive Gemaza-1, exposed to 150 mM NaCl. Parameters were determined for growth i.e. fresh or dry mass (FM, DM), osmotic concentration (OC) of organic/inorganic solute, leaf relative water content (LRWC), photosynthesis pigment content (PPC), and selective antioxidant system (AOS) enzyme/molecule that might be involved in the stress remediation. Sakha-69 exhibited salinity tolerance greater than Gemaza-1 and SA ameliorated their salinity stresses like drought stress, suggesting that a common tolerant mechanism might be involved in the stresses. Salinity decreased root growth by 44–52% more strongly than shoot (36–41%) in FM or those in DM (32–35%). SA ameliorated root growth (40–60%) more efficiently than shoot (6–24%) for DM/FM. These results suggested that salinity and SA might target sensitive roots and hence influencing shoot functions. In fact, salinity reduced PPC by 10–18%, LRWC by 16–28%, and more sensitively, OC of inorganic solutes (K⁺, Ca²⁺, Mg²⁺) in shoot (19–36%) and root (25–59%), except a conspicuous increase in Na⁺, and SA recovered all the reductions near to control levels. SA and salinity increased additively most parameters for OC of organic solutes (sugars and organic acids) and AOS (glutathione and related enzyme activities), like drought responses. However, SA decreased the Na⁺ and proline contents and catalase activity in a counteracting manner to salinity. It is concluded from this experiment that SA-mediated tolerance might involve two mechanisms, one specific for minerals in root and the other related to drought/dehydration tolerance governed in the whole module systems.

水杨酸（SA）在小麦（Triticum aestivum）的耐旱性中具有重要作用L.），但其与耐盐性的相关性尚未得到很好的理解。在本研究中，使用两个小麦品种，即耐旱的Sakha-69和对干旱敏感的Gemaza-1，暴露于150 mM NaCl中，研究了SA和盐分响应的可能作用。确定生长参数，即新鲜或干燥质量（FM，DM），有机/无机溶质的渗透浓度（OC），叶片相对水含量（LRWC），光合作用色素含量（PPC）和选择性抗氧化剂系统（AOS）酶/分子可能与压力修复有关。Sakha-69的耐盐性大于Gemaza-1，SA减轻了它们的盐胁迫，如干旱胁迫，表明该胁迫可能涉及一种共同的耐受机制。在FM或DM中，盐分比根茎（36-41％）的根生长降低了44-52％，幅度更大（32-35％）。SA比DM / FM更有效地改善了根系生长（40–60％），而嫩梢（6–24％）更有效。这些结果表明盐度和SA可能靶向敏感根，从而影响枝条功能。实际上，盐度将PPC降低了10–18％，LRWC降低了16–28％，更敏感的是，降低了无机溶质的OC（K根（19–36％）和根部（25–59％）中的⁺，Ca 2 ⁺，Mg ²⁺）除外，但Na ⁺显着增加，而SA恢复了所有降低至对照水平。SA和盐度增加了有机溶质（糖和有机酸）和AOS（谷胱甘肽和相关酶的活性）的OC的大多数参数，如干旱响应。然而，SA以与盐度相反的方式降低了Na ⁺和脯氨酸含量以及过氧化氢酶活性。从该实验得出的结论是，SA介导的耐受性可能涉及两种机制，一种是针对根中矿物质的特异性，另一种与整个模块系统中控制的干旱/脱水耐受性有关。