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Effects of zinc application on cadmium (Cd) accumulation and plant growth through modulation of the antioxidant system and translocation of Cd in low- and high-Cd wheat cultivars.
Environ Pollut. 2020 Oct; 265(Pt A):115045.EP

Abstract

Cadmium (Cd) contamination is a big challenge for managing food supply and safety around the world. Reduction of the bioaccumulation of cadmium (Cd) in wheat is an important way to minimize Cd hazards to human health. This study compared and highlighted the effects of soil and foliar applications of Zn on Cd accumulation and toxicity in cultivars with high Cd accumulation (high-Cd wheat) and low Cd accumulation (low-Cd wheat). Both foliar and soil Zn applications provided effective strategies for reducing wheat grain Cd concentrations in the high-Cd wheat by 26-49% and 25-52%, respectively, and these also significantly reduced the concentrations in wheat stems and leaves. Foliar and soil Zn applications significantly reduced Cd in leaves and stems of the low-Cd wheat but had no effects on grain Cd. Both soil and foliar Zn applications significantly alleviated Cd toxicity by regulation of Cd transport genes, as reflected by the increased grain yield and antioxidant enzyme activity in the wheat tissues. Gene expression in response to zinc application differed in the two wheat cultivars. Down-regulation of the influx transporter (TaNramp5) and upregulation of the efflux transporters (TaTM20 and TaHMA3) in the high-Cd wheat may have contributed to the Zn-dependent Cd alleviation and enhanced its tolerance to Cd toxicity. Additionally, foliar Zn applications down-regulated the leaf TaHMA2 expression that reduced root Cd translocation to shoots, while soil Zn applications down-regulated the root TaLCT1 expression, which contributed to the reduction of root Cd concentrations. Soil (99 kg ZnSO4·7H2O ha-1) and foliar (0.36 kg ZnSO4·7H2O ha-1) Zn applications can effectively decrease the Cd in grains and guarantee food safety and yield, simultaneously. The presented results provide a new insight into the mechanisms of, and strategies for, using Zn for the Cd reduction in wheat.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Zhou J
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; College of Resource and Environment, Anhui Science and Technology University, Fengyang, Anhui, 233100, China.
Zhang C
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
Du B
Nanjing Institute of Environmental Sciences, Ministry of Ecological Environment, Nanjing, 210042, China.
Cui H
School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China.
Fan X
College of Resource and Environment, Anhui Science and Technology University, Fengyang, Anhui, 233100, China.
Zhou D
School of the Environment, Nanjing University, Nanjing, 210023, China.
Zhou J
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China. Electronic address: zhoujing@issas.ac.cn.

MeSH

AntioxidantsCadmiumHumansSoilSoil PollutantsTriticumZinc

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32593926

Citation

Zhou, Jun, et al. "Effects of Zinc Application On Cadmium (Cd) Accumulation and Plant Growth Through Modulation of the Antioxidant System and Translocation of Cd in Low- and high-Cd Wheat Cultivars." Environmental Pollution (Barking, Essex : 1987), vol. 265, no. Pt A, 2020, p. 115045.
Zhou J, Zhang C, Du B, et al. Effects of zinc application on cadmium (Cd) accumulation and plant growth through modulation of the antioxidant system and translocation of Cd in low- and high-Cd wheat cultivars. Environ Pollut. 2020;265(Pt A):115045.
Zhou, J., Zhang, C., Du, B., Cui, H., Fan, X., Zhou, D., & Zhou, J. (2020). Effects of zinc application on cadmium (Cd) accumulation and plant growth through modulation of the antioxidant system and translocation of Cd in low- and high-Cd wheat cultivars. Environmental Pollution (Barking, Essex : 1987), 265(Pt A), 115045. https://doi.org/10.1016/j.envpol.2020.115045
Zhou J, et al. Effects of Zinc Application On Cadmium (Cd) Accumulation and Plant Growth Through Modulation of the Antioxidant System and Translocation of Cd in Low- and high-Cd Wheat Cultivars. Environ Pollut. 2020;265(Pt A):115045. PubMed PMID: 32593926.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of zinc application on cadmium (Cd) accumulation and plant growth through modulation of the antioxidant system and translocation of Cd in low- and high-Cd wheat cultivars. AU - Zhou,Jun, AU - Zhang,Chen, AU - Du,Buyun, AU - Cui,Hongbiao, AU - Fan,Xingjun, AU - Zhou,Dongmei, AU - Zhou,Jing, Y1 - 2020/06/18/ PY - 2020/04/20/received PY - 2020/06/14/revised PY - 2020/06/14/accepted PY - 2020/7/1/pubmed PY - 2020/8/18/medline PY - 2020/6/29/entrez KW - Antioxidant enzymes KW - Bioconcentration factors KW - Genes expression KW - Micronutrient KW - Translocation factor SP - 115045 EP - 115045 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 265 IS - Pt A N2 - Cadmium (Cd) contamination is a big challenge for managing food supply and safety around the world. Reduction of the bioaccumulation of cadmium (Cd) in wheat is an important way to minimize Cd hazards to human health. This study compared and highlighted the effects of soil and foliar applications of Zn on Cd accumulation and toxicity in cultivars with high Cd accumulation (high-Cd wheat) and low Cd accumulation (low-Cd wheat). Both foliar and soil Zn applications provided effective strategies for reducing wheat grain Cd concentrations in the high-Cd wheat by 26-49% and 25-52%, respectively, and these also significantly reduced the concentrations in wheat stems and leaves. Foliar and soil Zn applications significantly reduced Cd in leaves and stems of the low-Cd wheat but had no effects on grain Cd. Both soil and foliar Zn applications significantly alleviated Cd toxicity by regulation of Cd transport genes, as reflected by the increased grain yield and antioxidant enzyme activity in the wheat tissues. Gene expression in response to zinc application differed in the two wheat cultivars. Down-regulation of the influx transporter (TaNramp5) and upregulation of the efflux transporters (TaTM20 and TaHMA3) in the high-Cd wheat may have contributed to the Zn-dependent Cd alleviation and enhanced its tolerance to Cd toxicity. Additionally, foliar Zn applications down-regulated the leaf TaHMA2 expression that reduced root Cd translocation to shoots, while soil Zn applications down-regulated the root TaLCT1 expression, which contributed to the reduction of root Cd concentrations. Soil (99 kg ZnSO4·7H2O ha-1) and foliar (0.36 kg ZnSO4·7H2O ha-1) Zn applications can effectively decrease the Cd in grains and guarantee food safety and yield, simultaneously. The presented results provide a new insight into the mechanisms of, and strategies for, using Zn for the Cd reduction in wheat. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/32593926/Effects_of_zinc_application_on_cadmium__Cd__accumulation_and_plant_growth_through_modulation_of_the_antioxidant_system_and_translocation_of_Cd_in_low__and_high_Cd_wheat_cultivars_ DB - PRIME DP - Unbound Medicine ER -