ABSTRACT

Salinity and reducing its destructive effects on plant, soil, and water is among the most important challenges in agricultural lands. This study aims to evaluate the effect of zinc (Zn) and salinity on some physiological and biochemical properties of rosemary. A greenhouse experiment with two levels of Zn (0 and 20 mg kg⁻¹) and salinity of sodium chloride (0, 60, and 120 mM) in a completely randomized design was used. Salinity decreased dry weight and concentrations of K, Ca, Mg, and Zn in rosemary shoots. However, it increased electrolyte leakage, shoot sodium concentration, phenolic compounds, and catalase activity. Zinc application increased rosemary dry weight by 13% and 9% under salinity levels of 0 and 60 mM NaCl, respectively. However, at higher salinity level (120 mM), it could not ameliorate the negative impact of salinity. Zinc improved the growth of rosemary under salinity stress by increasing the cell membrane stability, increasing shoot K, Ca, Mg, and Zn concentrations, and decreasing shoot Na concentration. The concentration of phenolic compounds in the leaves of rosemary grown under the salinity levels of 0 and 60 mM NaCl increased under the influence of Zn application. Nevertheless, the phenolic content remained unchanged under 120 mM NaCl salinity level. In this study, Zn addition increased catalase activity under all salinity levels. According to the results, optimum soil Zn application can be considered as an efficient and rapid solution for increasing rosemary growth and its tolerance to salinity stress.

摘要

盐度及其对植物、土壤和水的破坏性影响是农业用地面临的最重要挑战之一。本研究旨在评估锌（Zn）和盐度对迷迭香某些生理生化特性的影响。具有两个水平的 Zn（0 和 20 mg kg ^-1) 和氯化钠盐度（0、60 和 120 mM）在完全随机设计中使用。盐度降低了迷迭香枝条中的干重和 K、Ca、Mg 和 Zn 的浓度。然而，它增加了电解质泄漏、芽钠浓度、酚类化合物和过氧化氢酶活性。在 0 和 60 mM NaCl 的盐度水​​平下，锌应用分别使迷迭香干重增加了 13% 和 9%。然而，在较高的盐度水平（120 mM）下，它不能改善盐度的负面影响。锌通过增加细胞膜稳定性，增加枝条 K、Ca、Mg 和 Zn 浓度，并降低枝条 Na 浓度来改善盐胁迫下迷迭香的生长。在 0 和 60 mM NaCl 盐度水平下生长的迷迭香叶子中酚类化合物的浓度在锌施用的影响下增加。然而，酚类含量在 120 mM NaCl 盐度水平下保持不变。在这项研究中，锌的添加增加了所有盐度水平下的过氧化氢酶活性。根据结果​​，最佳土壤锌施用可被认为是增加迷迭香生长及其对盐胁迫耐受性的有效且快速的解决方案。