The field pennycress (Thlaspi arvense L.) is a sensitive non-accumulator of metals. The main objective of the present work was to evaluate the effects of Cd stress in T. arvense using a physiological approach. Four-week-old plants were exposed to increasing concentrations of Cd (0, 10, 50 and 100 μM Cd(NO₃)₂) for 14 days. Plants were harvested at days 0, 3, 7 and 14 to assess the following parameters: shoot and root length and fresh weight; osmolality and conductivity in leaves; chlorophyll a and b contents and photosynthetic efficiency in leaves (young and expanded); water content, Cd accumulation and nutrient imbalances in leaves (young and expanded) and roots. Thlaspi arvense presented a reduction of 27% in the length of roots exposed to 100 μM Cd, and in plants exposed to 50 and 100 μM Cd, a reduction in the fresh weight of both shoots (53 and 58%, respectively) and roots (58 and 63%, respectively) was observed. In general, in plants exposed to the highest concentrations of Cd, a decrease in leaves osmolality and membrane permeability and in water content of both roots and leaves were observed, as well as several nutrient imbalances. As for the photosynthetic parameters, young and expanded leaves responded differently to Cd stress. Exposed young leaves presented no alterations in photosynthetic efficiency or chlorophyll contents, while expanded leaves of 100 μM Cd-treated plants showed a reduction of up to 67% in chlorophyll contents and a concomitant reduction of 30% in photosynthetic efficiency. Overall, Cd-induced senescence in the non-accumulator plant T. arvense exposed to high concentrations of Cd, which was measured as a decrease in several physiological and biochemical parameters and nutrient imbalances. These Cd-induced alterations resulted in lower plant growth, which might have further implications on plant performance at the population level.

田间仙人掌 ( Thlaspi arvense L.) 是一种敏感的非金属积累者。目前工作的主要目的是使用生理学方法评估 Cd 胁迫对T. arvense的影响。4 周龄的植物暴露于浓度不断增加的 Cd（0、10、50 和 100 μM C​​d(NO ₃ ) ₂）14 天。在第 0、3、7 和 14 天收获植物以评估以下参数：枝条和根的长度和鲜重；叶子的渗透压和电导率；叶中叶绿素 a 和 b 的含量和光合效率（幼叶和扩大叶）；叶（幼嫩和膨大）和根中的水分含量、镉积累和养分失衡。紫菜暴露于 100 μM C​​d 的根长度减少了 27%，暴露于 50 μM C​​d 的植物中，芽（分别为 53% 和 58%）和根（分别为 58% 和 58%）的鲜重都减少了。 63%，分别）被观察到。一般而言，在暴露于最高浓度 Cd 的植物中，观察到叶片渗透压和膜渗透性以及根和叶片的水分含量降低，以及一些营养失衡。至于光合参数，幼叶和膨胀叶对镉胁迫的反应不同。暴露的幼叶没有表现出光合效率或叶绿素含量的变化，而 100 μM C​​d 处理的植物的膨胀叶显示叶绿素含量降低高达 67%，同时光合效率降低 30%。全面的，T. arvense暴露于高浓度的 Cd，测量结果为几个生理和生化参数的减少以及营养失衡。这些 Cd 诱导的改变导致植物生长缓慢，这可能对种群水平的植物性能产生进一步影响。