Exogenous Glutathione Alleviates Cadmium Toxicity in Wheat by Influencing the Absorption and Translocation of Cadmium

Cadmium (Cd), a toxic heavy metal, is harmful to plants and human health. Glutathione (GSH) could alleviate Cd toxicity of plant species, whereas its mechanism responsible for wheat remains poorly understood. Here, we found that exogenous GSH application significantly increased the fresh and dry wei...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2021-08, Vol.107 (2), p.320-326
Main Authors: Li, Ge-Zi, Chen, Shi-Juan, Li, Na-Ying, Wang, Ying-Ying, Kang, Guo-Zhang
Format: Article
Language:English
Subjects:
Antioxidants
Aquatic Pollution
Cadmium
Chlorophyll
Earth and Environmental Science
Ecotoxicology
Elongation
Environment
Environmental Chemistry
Environmental Health
Gene expression
Genes
Glutathione
Heavy metals
Malondialdehyde
Plant species
Pollution
Roots
Soil Science & Conservation
Synthesis
Toxicity
Translocation
Waste Water Technology
Water Management
Water Pollution Control
Wheat
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Summary:Cadmium (Cd), a toxic heavy metal, is harmful to plants and human health. Glutathione (GSH) could alleviate Cd toxicity of plant species, whereas its mechanism responsible for wheat remains poorly understood. Here, we found that exogenous GSH application significantly increased the fresh and dry weight, root elongation, chlorophyll contents, while decreased the contents of malondialdehyde (MDA) and GSH, and translocation factor of Cd compared with Cd treatment. Moreover, GSH application significantly increased activities of antioxidant enzymes and expression of related genes, which involved in GSH synthesis, especially in roots. In addition, we found that GSH application suppressed Cd-induced expression of metal transporter genes TaNramp1 , TaNramp5 , TaHMA2 , TaHMA3 , TaLCT1 and TaIRT2 in roots. Taken together, our results suggested that GSH could alleviate Cd toxicity in wheat by increasing GSH synthesis gene expression or suppressing Cd transporter genes expression, and further affecting Cd uptake and translocation in wheat plants.
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-021-03283-8