The artificial radionuclide ⁹⁰Sr is the main radionuclide in radioactive environmental pollution. In this study, celery was cultured in a laboratory hydroponics system for 21 days with strontium (Sr) levels of 0 (control), 0.5, 1, 2.5, 5, and 10 mM. The changes in the Sr contents in celery leaves and roots as well as the translocation factor (TF) values (ratio of the Sr concentration in aerial plant parts to that in roots) under different Sr concentrations were studied. Additionally, the effects of Sr stress on the absorption of six nutrients, the chlorophyll content, and the biomass of the celery were investigated. The results showed that the Sr contents in celery leaves and roots increased with the increasing Sr concentration in the hydroponic solution, but the increase of the Sr concentration in roots slowed under the 10 mM Sr treatment. The mean TF values ranged from 0.40 ± 0.01 to 1.12 ± 0.17. With the increase in Sr concentration in the hydroponic medium, the contents of calcium, iron, and potassium in the celery leaves were significantly reduced, and the absorption of calcium, iron, and magnesium by roots was significantly inhibited. Compared with the control, sulfur concentration in celery roots increased significantly under the Sr treatments increasing except the 10 mM Sr treatment. The changes in chlorophyll content were consistent with those of celery biomass, and the values of both these parameters were high under the 5 mM Sr treatment.

中文翻译：

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水培芹菜中锶的吸收及其影响

人工放射性核素⁹⁰Sr是放射性环境污染中的主要放射性核素。在这项研究中，将芹菜在实验室水培系统中培养21天，锶（Sr）的水平为0（对照），0.5、1、2.5、5和10 mM。研究了在不同Sr浓度下芹菜叶和根中Sr含量的变化以及转运因子（TF）值（空中植物部分中Sr浓度与根中Sr浓度的比）。此外，研究了Sr胁迫对芹菜6种养分吸收，叶绿素含量和生物量的影响。结果表明，随着水培溶液中Sr浓度的增加，芹菜叶和根中的Sr含量增加，但在10 mM Sr处理下，根中Sr浓度的增加变慢。平均TF值范围为0。40±0.01至1.12±0.17。随着水培介质中Sr浓度的增加，芹菜叶中钙，铁和钾的含量显着降低，并且根部对钙，铁和镁的吸收受到明显抑制。与对照相比，除10 mM Sr处理外，随着Sr处理的增加，芹菜根中的硫浓度显着增加。叶绿素含量的变化与芹菜生物量的变化一致，并且在5 mM Sr处理下，这两个参数的值都很高。与对照相比，除10 mM Sr处理外，随着Sr处理的增加，芹菜根中的硫浓度显着增加。叶绿素含量的变化与芹菜生物量的变化一致，并且在5 mM Sr处理下，这两个参数的值都很高。与对照相比，除10 mM Sr处理外，随着Sr处理的增加，芹菜根中的硫浓度显着增加。叶绿素含量的变化与芹菜生物量的变化一致，并且在5 mM Sr处理下，这两个参数的值都很高。