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Zinc fertilisation increases grain zinc and reduces grain lead and cadmium concentrations more in zinc-biofortified than standard wheat cultivar.
Sci Total Environ. 2017 Dec 15; 605-606:454-460.ST

Abstract

Given that plant uptake and transport systems for metals have some similarities, zinc (Zn)-biofortified cultivars may concurrently accumulate non-essential toxic heavy metals in grains. However, Zn-biofortified cultivars have never been tested for heavy metal accumulation in grains. In a pot experiment, we compared Zn-biofortified wheat (Zincol-2016) with a standard wheat (Faisalabad-2008) cultivar on heavy-metal-contaminated soils for yield response and grain accumulation of Zn, lead (Pb) and cadmium (Cd), without or with Zn fertilisation (8mgZnkg-1). The soils, collected from agricultural fields in (i) industrial zone and (ii) peri-urban area, had been receiving industrial and city effluents for >20years. In the two soils, Zn fertilisation significantly (P≤0.05) increased grain yield of both cultivars. Zinc fertilisation increased grain Zn concentration of Zincol-2016 and Faisalabad-2008 by respectively 32 and 18% in industrial-zone soil, and by 15 and 2% in peri-urban soil. Averaged across Zn rates, Zincol-2016 accumulated in grains more than double the Zn amount than Faisalabad-2008 in industrial-zone soil. At 0mgZnkg-1, grain Pb and Cd concentrations were respectively 26 and 33% greater in Zincol-2016 than Faisalabad-2008 in industrial-zone soil, and 86 and 50% greater in Zincol-2016 than Faisalabad-2008 in peri-urban soil. Zinc fertilisation significantly (P≤0.05) decreased concentration of Pb and Cd in grains of both cultivars. In industrial-zone soil, a toxic level of Pb in grains (0.24mgkg-1) was attained at control rate of Zn by Zincol-2016, and was decreased to a safe level (0.07mgkg-1) by application of 8mgZnkg-1. Therefore, biofortified cultivars should not be grown in contaminated soils, and/or sufficient Zn must be applied, to decrease accumulation of non-essential toxic heavy metals in grains. Moreover, future breeding efforts should be directed toward selection of biofortified cultivars that would selectively accumulate Zn in grains, but not the contaminants.

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Authors+Show Affiliations

Qaswar M
Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan 60800, Pakistan.
Hussain S
Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan 60800, Pakistan. Electronic address: shahid.hussain@bzu.edu.pk.
Rengel Z
UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia.

MeSH

CadmiumEdible GrainFertilizersLeadSoilSoil PollutantsTriticumZinc

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28672234

Citation

Qaswar, Muhammad, et al. "Zinc Fertilisation Increases Grain Zinc and Reduces Grain Lead and Cadmium Concentrations More in Zinc-biofortified Than Standard Wheat Cultivar." The Science of the Total Environment, vol. 605-606, 2017, pp. 454-460.
Qaswar M, Hussain S, Rengel Z. Zinc fertilisation increases grain zinc and reduces grain lead and cadmium concentrations more in zinc-biofortified than standard wheat cultivar. Sci Total Environ. 2017;605-606:454-460.
Qaswar, M., Hussain, S., & Rengel, Z. (2017). Zinc fertilisation increases grain zinc and reduces grain lead and cadmium concentrations more in zinc-biofortified than standard wheat cultivar. The Science of the Total Environment, 605-606, 454-460. https://doi.org/10.1016/j.scitotenv.2017.06.242
Qaswar M, Hussain S, Rengel Z. Zinc Fertilisation Increases Grain Zinc and Reduces Grain Lead and Cadmium Concentrations More in Zinc-biofortified Than Standard Wheat Cultivar. Sci Total Environ. 2017 Dec 15;605-606:454-460. PubMed PMID: 28672234.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Zinc fertilisation increases grain zinc and reduces grain lead and cadmium concentrations more in zinc-biofortified than standard wheat cultivar. AU - Qaswar,Muhammad, AU - Hussain,Shahid, AU - Rengel,Zed, Y1 - 2017/06/30/ PY - 2017/05/21/received PY - 2017/06/25/revised PY - 2017/06/27/accepted PY - 2017/7/4/pubmed PY - 2018/8/9/medline PY - 2017/7/4/entrez KW - Agronomic Zn biofortification KW - Calcareous soils KW - Genetic Zn biofortification KW - Non-essential toxic heavy metals KW - Pakistan KW - Zincol-2016 SP - 454 EP - 460 JF - The Science of the total environment JO - Sci Total Environ VL - 605-606 N2 - Given that plant uptake and transport systems for metals have some similarities, zinc (Zn)-biofortified cultivars may concurrently accumulate non-essential toxic heavy metals in grains. However, Zn-biofortified cultivars have never been tested for heavy metal accumulation in grains. In a pot experiment, we compared Zn-biofortified wheat (Zincol-2016) with a standard wheat (Faisalabad-2008) cultivar on heavy-metal-contaminated soils for yield response and grain accumulation of Zn, lead (Pb) and cadmium (Cd), without or with Zn fertilisation (8mgZnkg-1). The soils, collected from agricultural fields in (i) industrial zone and (ii) peri-urban area, had been receiving industrial and city effluents for >20years. In the two soils, Zn fertilisation significantly (P≤0.05) increased grain yield of both cultivars. Zinc fertilisation increased grain Zn concentration of Zincol-2016 and Faisalabad-2008 by respectively 32 and 18% in industrial-zone soil, and by 15 and 2% in peri-urban soil. Averaged across Zn rates, Zincol-2016 accumulated in grains more than double the Zn amount than Faisalabad-2008 in industrial-zone soil. At 0mgZnkg-1, grain Pb and Cd concentrations were respectively 26 and 33% greater in Zincol-2016 than Faisalabad-2008 in industrial-zone soil, and 86 and 50% greater in Zincol-2016 than Faisalabad-2008 in peri-urban soil. Zinc fertilisation significantly (P≤0.05) decreased concentration of Pb and Cd in grains of both cultivars. In industrial-zone soil, a toxic level of Pb in grains (0.24mgkg-1) was attained at control rate of Zn by Zincol-2016, and was decreased to a safe level (0.07mgkg-1) by application of 8mgZnkg-1. Therefore, biofortified cultivars should not be grown in contaminated soils, and/or sufficient Zn must be applied, to decrease accumulation of non-essential toxic heavy metals in grains. Moreover, future breeding efforts should be directed toward selection of biofortified cultivars that would selectively accumulate Zn in grains, but not the contaminants. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/28672234/Zinc_fertilisation_increases_grain_zinc_and_reduces_grain_lead_and_cadmium_concentrations_more_in_zinc_biofortified_than_standard_wheat_cultivar_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(17)31663-7 DB - PRIME DP - Unbound Medicine ER -