Cadmium (Cd) contamination and soil salinity are the main environmental issues reducing crop productivity. This study aimed to examine the combined effects of salinity (NaCl) and Cd on the physiological and biochemical attributes of quinoa (Chenopodium quinoa Willd.). For this purpose, 30-day-old plants of quinoa genotype “Puno” were transplanted in Hoagland's nutrient solution containing diverse concentrations of Cd: 0, 50, 100, 200 µM Cd, and salinity: 0, 150, and 300 mM NaCl. Results demonstrated that plant growth, stomatal conductance, and pigment contents were significantly lower at all Cd concentrations than the control plants. Quinoa plants exhibited improved growth and tolerance against Cd when grown at a lower level of salinity (150 mM NaCl) combined with Cd. In contrast, the elevated concentration of salinity (300 mM NaCl) combined with Cd reduced shoot and root growth of experimental plants more than 50%. Combined application of salinity and Cd increased Na (25-fold), while lessened the Cd (twofold) and K (1.5-fold) uptake. A blend of high concentrations of Na and Cd caused overproduction of H₂O₂ (eightfold higher than control) contents and triggered lipid peroxidation. The activities of antioxidant enzymes: ascorbate peroxidase (APX), catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD) were 13, 12, 7 and ninefold higher than control to mitigate the oxidative stress. Due to restricted root to shoot translocation, and greater tolerance potential against Cd, the quinoa genotype, Puno, is suitable for phytostabilization of Cd in saline soils.

镉 (Cd) 污染和土壤盐分是降低作物生产力的主要环境问题。本研究旨在考察盐度 (NaCl) 和 Cd 对藜麦 ( Chenopodium quinoa ) 生理生化特性的综合影响威尔德）。为此，将生长 30 天的藜麦基因型“Puno”植物移植到 Hoagland 的营养液中，该溶液含有不同浓度的 Cd：0、50、100、200 µM Cd 和盐度：0、150 和 300 mM NaCl。结果表明，在所有 Cd 浓度下，植物生长、气孔导度和色素含量均显着低于对照植物。当在较低盐度（150 mM NaCl）与 Cd 结合的条件下生长时，藜麦植物表现出更好的生长和对 Cd 的耐受性。相比之下，高浓度的盐度 (300 mM NaCl) 与 Cd 结合使实验植物的芽和根生长减少了 50% 以上。盐度和 Cd 的联合应用增加了 Na（25 倍），同时减少了 Cd（两倍）和 K（1.5 倍）的吸收。₂ O ₂（比对照高八倍）含量并引发脂质过氧化。抗坏血酸过氧化物酶 (APX)、过氧化氢酶 (CAT)、过氧化物酶 (POD) 和超氧化物歧化酶 (SOD) 的抗氧化酶活性分别比对照高 13、12、7 和 9 倍，以减轻氧化应激。由于受限制的根茎易位和对 Cd 的更大耐受性潜力，藜麦基因型 Puno 适用于盐渍土壤中 Cd 的植物稳定。