Salt stress affects plant physiology, development, and growth. This research investigated varied salinity levels on growth traits and ions accumulation of four zoysiagrasses and aimed to identify phenotypic traits associated with variability in salinity tolerance. In this study, “S001” zoysiagrass (Zoysia sinica), “Diamond” zoysiagrass (Zoysia matrella), “J026” zoysiagrass (Zoysia japonica), and “M001” zoysiagrass (Zoysia macrostachya) were grown in plastic pots and exposed to 1/2 Hoagland nutrient solution amended with different amounts of NaCl for 120 days. At the end of the experiment, growth traits and ion contents were determined. The results showed that the salt-tolerance of four zoysiagrasses ranked as “M001” > “Diamond” > “J026” > “S001” according to percent green leaf canopy area (GLCA) after 120 days of salinity treatment. Although dry leaf weight, leaf length/width, and shoot height were significantly decreased by salinity treatments for all turfgrasses, the salt-tolerant species had a smaller drop. Besides, ions secretion capacity and Na+ concentration in leaf and root increased, but K+ concentration together with leaf and root K+/Na+ ratios decreased with the increasing concentration of the salinity. However, the salt-tolerant species exhibited strong K+ absorption and transportation ability and a high salt secretion capacity. The results indicated that growth traits and ions regulation were related to variability in tolerance of diverse zoysiagrasses to salt stress.

中文翻译：

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不同盐度处理结缕草生长性状及离子调控的比较研究

盐胁迫影响植物生理、发育和生长。本研究调查了不同盐度水平对四种结缕草生长性状和离子积累的影响，旨在确定与耐盐性变化相关的表型性状。本研究中，“S001”结缕草（结缕草), “钻石”结缕草 (结缕草）、“J026”结缕草（结缕草) 和“M001”结缕草 (大穗结缕草) 在塑料盆中生长，并暴露在 1/2 Hoagland 营养液中，用不同量的 NaCl 修正 120 天。在实验结束时，测定生长性状和离子含量。结果表明，盐分处理120天后，4种结缕草的耐盐性按绿叶冠层面积百分比（GLCA）排序为“M001”>“钻石”>“J026”>“S001”。虽然盐处理对所有草坪草的干叶重、叶长/宽度和枝高显着降低，但耐盐物种的降幅较小。此外，离子分泌能力和Na+叶和根中的浓度增加，但 K+与叶和根 K 一起的浓度+/钠+比例随着盐度浓度的增加而降低。然而，耐盐物种表现出强钾+吸收运输能力强，盐分分泌能力强。结果表明，生长性状和离子调控与不同结缕草对盐胁迫的耐受性变异有关。