Marigold (Calendula calypso) is a multipurpose ornamental plant, but its cadmium (Cd) tolerance and phytoremediation potential is unknown. The proposed study was carried out to unravel Cd partitioning, physiological and oxidative stress responses of C. calypso grown under Cd stress. Plants were grown for four months in pots having different soil Cd levels: 0, 25, 50, 75, and 100 mg kg⁻¹ soil. Plant growth, biomass, photosynthetic pigments, leaf water contents, stomatal conductance, and membrane stability index were not decreased at 25 mg kg⁻¹ Cd. At higher levels of Cd stress, activities of antioxidant enzymes (SOD, APX, CAT, POD) increased to mitigate H₂O₂ and lipid peroxidation. Cadmium uptake in plants increased with increasing soil Cd levels, and roots accumulated a greater portion of Cd, followed by shoots and flowers, respectively. On the basis of Cd accumulation and its tolerance, it was determined that C. calypso can be successfully grown for phytostabilization of Cd contaminated soils.

中文翻译：

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生长在受污染土壤上的万寿菊（金盏花）中的镉分配，生理和氧化胁迫响应：对植物修复的影响。

万寿菊（金盏花calypso）是一种多用途观赏植物，但其对镉（Cd）的耐受性和植物修复潜力尚不清楚。进行了拟议的研究，以阐明Cd胁迫下生长的C. calypso的Cd分配，生理和氧化应激反应。使植物在具有不同土壤Cd水平（0、25、50、75和100 mg kg ^-1土壤）的盆中生长四个月。在25 mg kg ^-1 Cd下，植物生长，生物量，光合色素，叶片含水量，气孔导度和膜稳定性指数均未降低。在较高的镉胁迫下，抗氧化酶（SOD，APX，CAT，POD）的活性增加，从而减轻了H ₂ O ₂和脂质过氧化。植物对镉的吸收随着土壤中Cd含量的增加而增加，而根部积累的Cd比例更大，其次是芽和花。根据Cd的积累及其耐受性，可以确定C. calypso可以成功地生长用于Cd污染土壤的植物稳定化。