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Nickel uptake, partitioning and physiological responses of lettuce grown in a closed-cycle hydroponic system
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DOI：10.1016/j.scienta.2026.114958.png)
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Abstract
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• Nickel exposure in a closed-cycle NFT system caused a rapid, dose-dependent reduction in lettuce growth and yield. • Even moderate Ni concentrations (75 µM) significantly decreased water and nutrient use efficiency. • Nickel accumulation was predominantly localized in roots, confirming root sequestration as a primary detoxification mechanism. • Prolonged exposure increased Ni translocation to leaves, leading to critical accumulation in edible tissues. • Antioxidant enzymes (CAT, POD, SOD) and nitrogen metabolism (NR, NiR) showed cultivardependent responses to Ni stress.
Keywords:
Food safety
Lactuca sativa l.
Metal
Nickel toxicity
Nutrient film technique
nutrient solution
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