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

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...

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Bibliographic Details
Published in:Biochemistry and biophysics reports 2024-03, Vol.37, p.101641, Article 101641
Main Authors: Yang, Jia-Shuo, Ahmed, Rana Imtiaz, Liu, Haiwei, Sheng, Song, Xiao, Wenfeng, Hu, Risheng, Dai, Yanjiao
Format: Article
Language:English
Subjects:
Apoplastic transport
Cadmium uptake
Root lignification
Sodium chloride pretreatment
Tobacco plants
Zinc uptake
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Summary: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. •Demonstrating the Efficacy of NaCl Induction in Reducing Cd Uptake.•Elucidating the Impact of NaCl Induction on Root Lignification and Cd Absorption Pathways.•Revealing the Differential Impact of NaCl Induction on Essential and Non-Essential Metal Uptake.
ISSN:2405-5808
2405-5808
DOI:10.1016/j.bbrep.2024.101641