The use of Cd-excluding cultivars on the most widespread soils moderately polluted with Cd is a sustainable solution for the safe agricultural production. In order to explore the defense mechanisms and differences in the cadmium (Cd) uptake from soils and accumulation in plant tissues between low-accumulator and excluder plants, Cd concentrations/loads in plant tissues and impact on plant growth and physiological properties (photosynthetic characteristics, antioxidant enzymes and related indices) of the cultivar Solanum melongena Liaoqie No.3 (SML) and the wild species Solanum torvum (STO) grown in soils containing from 0.24 to 18.61 mg kg⁻¹ Cd (i.e. from the natural Cd content through moderate to high pollution level) were studied in the pot experiments carried out under natural light conditions. It was found that the major protective barrier in the more sensitive to Cd toxicity excluder species (STO) was a root system accumulating 2-3-fold lesser Cd loads through the induction of dehydration/drought stress than a more Cd-tolerant low-accumulating plant (SML). A supportive defense mechanism appeared to be a reduced Cd enrichment of a xylem sap and its increased flow rate during long-distance transport from roots to leaves, occurring in the both types of plants, but with a lesser intensity in a more Cd-tolerant low-accumulating species. Due to maintaining plant-specific Cd-adaptive level, growth and biomasses of both species were basically the same, while due to the considerably lower Cd accumulation, photosynthetic parameters were higher in Cd-excluder STO species, and the amounts of lipid peroxidation (MDA) and free proline were higher in Cd low-accumulating SML cultivar. Concurrence of Cd and drought-resistance mechanism and better physiological parameters in Cd-excluder suggest promotion of this mechanism in cultivars under the climate change conditions.

在最广泛的受 Cd 中度污染的土壤上使用不含 Cd 的栽培品种是安全农业生产的可持续解决方案。为了探索低蓄积型植物和排阻植物之间在土壤中镉 (Cd) 吸收和植物组织中镉 (Cd) 吸收的防御机制和差异、植物组织中的 Cd 浓度/负荷及其对植物生长和生理特性（光合特性、栽培品种Solanum melongena Liaoqie No.3 (SML) 和野生种Solanum torvum (STO) 的抗氧化酶和相关指标）在含有 0.24 至 18.61 mg kg ^{-1 的}土壤中生长在自然光条件下进行的盆栽实验中研究了 Cd（即从天然 Cd 含量到中度至高污染水平）。发现对 Cd 毒性排除物种 (STO) 更敏感的主要保护屏障是根系通过诱导脱水/干旱胁迫积累的 Cd 负荷比更耐镉的低积累的根系少 2-3 倍。植物 (SML)。一种支持性防御机制似乎是木质部汁液中 Cd 富集的减少及其在从根到叶的长距离运输过程中增加的流速，发生在两种类型的植物中，但在更耐 Cd 的低浓度植物中强度较低- 积累物种。由于保持植物特有的镉适应水平，两个物种的生长和生物量基本相同，而由于 Cd 积累量相当低，Cd 排除剂 STO 物种的光合参数较高，并且在 Cd 低积累的 SML 品种中脂质过氧化 (MDA) 和游离脯氨酸的量较高。Cd 和抗旱机制的并发以及 Cd-excluder 中更好的生理参数表明在气候变化条件下该机制在品种中的推广。