The effect of potassium (K) concentration gradient on stable caesium (Cs) uptake by Calla palustris was studied under hydroponic conditions after eight-day exposure in a greenhouse experiment. The plants were exposed to two different concentrations of Cs (provided as 0.5 and 1 mM CsCl) and five different concentrations of K (provided as K₂SO₄ in 0.5, 1, 2, 5, and 10 mM). The results indicate negative dependence of Cs uptake on K concentrations for both Cs treatments. The application of K reduced the transfer of stable Cs from water to plant by about 44–72% for 0.5 mM CsCl and 56–74% for 1 mM CsCl. The highest efficiency of Cs removal from water was observed for plants in K⁺ deficient solutions (plants starving), with an efficiency 8.0% for plants cultivated in 0.5 mM CsCl and 9.4% for plants in 1 mM CsCl. An increasing concentration of K also supported translocation of Cs from roots to leaves. Higher translocation was observed for the treatments with lower level of Cs, where the concentration of Cs in leaves became higher than that in roots. The Cs uptake and translocations were affected not only by the external concentration of K, but also the external concentration of stable Cs. A high concentration of K in the environment protects the food chain from Cs uptake by plants, but lowers the efficiency of phytoremediation techniques.

在温室实验中，在水培条件下研究了钾（K）浓度梯度对马蹄莲稳定摄取铯（Cs）的影响。使植物暴露于两种不同浓度的Cs（提供为0.5和1 mM CsCl）和五种不同浓度的K（提供为0.5、1、2、5和10 mM中的K ₂ SO ₄）。结果表明，两种Cs处理均对Cs吸收对K浓度具有负相关性。钾肥的施用对0.5 mM CsCl减少了稳定Cs从水到植物的转移，对1 mM CsCl减少了56-74％。在K ^+中，观察到植物从水中去除Cs的效率最高。溶液（植物挨饿），对于在0.5 mM CsCl中种植的植物，效率为8.0％，对于在1 mM CsCl中种植的植物，效率为9.4％。钾浓度的增加也支持了Cs从根到叶的转运。Cs水平较低的处理中观察到较高的易位性，其中叶片中Cs的浓度高于根部。Cs的吸收和易位不仅受K的外部浓度的影响，还受稳定Cs的外部浓度的影响。环境中高浓度的钾可保护食物链免受植物吸收Cs的影响，但会降低植物修复技术的效率。