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Differential absorption of cadmium and zinc by tobacco plants: Role of apoplastic pathway

文献类型： 外文期刊

作者： Jia Shuo Yang;Rana Imtiaz Ahmed;Haiwei Liu;Song Sheng;Wenfeng Xiao;Risheng Hu;Yanjiao Dai

作者机构：

关键词： Apoplastic transport;Cadmium uptake;Root lignification;Sodium chloride pretreatment;Tobacco plants;Zinc uptake

期刊名称： Biochemistry and Biophysics Reports

ISSN： 2405-5808

年卷期： 2024 年 37 卷

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收录情况： 无来源刊（2024版）

摘要： Cadmium (Cd) contamination presents a significant challenge in global agriculture. This study explores the efficacy of chemical induction, specifically using sodium chloride (NaCl), to limit Cd uptake in tobacco (Nicotiana tabacum) and assesses its impact on essential divalent metal ions (DMIs). We conducted a comprehensive analysis encompassing ion absorption, root histology, and biochemistry to understand the influence of this method. Our results revealed that NaCl induction led to a notable 30 % decrease in Cd absorption, while maintaining minimal impact on zinc (Zn) uptake. Intriguingly, the absence of essential DMIs, such as calcium (Ca), magnesium (Mg), and Zn, was found to diminish the plant's capacity to absorb Cd. Furthermore, moderate NaCl induction resulted in an increased diameter of the root stele and enhanced lignin content, indicating a restriction of Cd absorption through the apoplastic pathway. Conversely, a compensatory absorption mechanism via the symplastic pathway appeared to be activated in the absence of essential elements. These findings highlight the potential of chemical induction as a strategy to mitigate agricultural Cd risks, offering insights into the complex interplay between plant ion transport pathways and metal uptake regulation.

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