Salinity is a deleterious factor that hinders plant production across the globe. Salinity reduces irrigation water quality. Plant tolerance to salinity stress requires sophisticated adaptation at the physiological level and in metabolic pathways. Experiments were set up to investigate saponin priming impact on the antioxidant metabolism and growth of soybean cultivated under salt stress. Two concentrations of saponin, i.e., 5 and 10% were used for priming the seeds. Seed priming at 5% effectively mitigated salinity stress mediating decline in growth and chlorophyll synthesis. Saponin (5%) improved chlorophyll and carotenoid synthesis significantly and ameliorated the adverse effects of NaCl. Soybean seedlings primed with 5% saponin exhibited the greater antioxidant enzyme activities and the biosynthesis of glutathione and ascorbic acid. Increased antioxidant metabolism of primed seedlings accompanied by the reduced rate of lipid peroxidation and increased membrane stability index. Additionally, saponin priming effectively augmented the relative water content of salt-stressed seedlings by improving the biosynthesis of proline, sugars, and glycine betaine. In conclusion, saponin priming (5%) proved beneficial through modulation of the antioxidant system, osmolytes metabolism, and the significant reduction in sodium-ion accumulation.

盐分是阻碍全球植物生产的有害因素。盐度降低了灌溉水的质量。植物对盐分胁迫的耐受性要求在生理水平和代谢途径上进行复杂的适应。建立了实验研究皂苷引发对盐胁迫下大豆抗氧化代谢和生长的影响。两种浓度的皂素，即5％和10％用于引发种子。5％的种子启动可有效缓解盐度胁迫，盐度胁迫介导生长和叶绿素合成的下降。皂苷（5％）可显着改善叶绿素和类胡萝卜素的合成，并减轻NaCl的不利影响。5％皂角素引发的大豆幼苗表现出更大的抗氧化酶活性以及谷胱甘肽和抗坏血酸的生物合成。引发的幼苗的抗氧化剂代谢增加，同时脂质过氧化速率降低，膜稳定性指数提高。此外，通过改善脯氨酸，糖和甘氨酸甜菜碱的生物合成，皂苷引发可以有效地增加盐胁迫幼苗的相对水分含量。总之，通过调节抗氧化剂系统，渗透物代谢和钠离子积累的显着减少，皂苷引发（5％）被证明是有益的。