Seed priming and soil application of zinc decrease grain cadmium accumulation in standard and zinc-biofortified wheat cultivars

IF 1.8 4区农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY

Crop & Pasture Science Pub Date : 2022-11-15 DOI:10.1071/CP22255

A. Umar, S. Hussain

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引用次数: 0

Abstract

ABSTRACT Context. Cadmium (Cd) is a toxic metal for both plants and humans. Wheat grown on Cd-contaminated soils may accumulate toxic levels of Cd in grains. Aim. This study aimed to compare soil zinc (Zn) application and seed Zn-priming for decreasing grain Cd concentration in standard and Zn-biofortified wheat cultivars grown on Cd-spiked soil. Methods. Standard (Jauhar-2016) and Zn-biofortified (Zincol-2016) wheat cultivars were grown in pots filled with Cd-spiked soil (8 mg Cd kg−1). The tested Zn treatments were un-primed, hydro-primed, and Zn-primed seeds with and without soil Zn application at 8 mg kg−1. Key results. Zinc treatments significantly mitigated the toxic effects of Cd on the growth and physiological parameters of both cultivars. As compared to control, all Zn treatments significantly increased Zn and decreased Cd concentration in grains of the cultivars. On average, the maximum increase in grain Zn concentration over control was approximately 36% with Zn-priming + soil Zn. The same treatment, as compared to control, decreased grain Cd concentration by 42% in Zincol-2016 and 35% in Jauhar-2016. Grain Cd concentration was within the permissible level (≤0.2 mg kg−1) in Jauhar-2016 at all Zn treatments and in Zincol-2016 at Zn-priming + soil Zn. Conclusion. Soil Zn application, seed Zn-priming, and their combination were effective in decreasing grain Cd accumulation in wheat grown on Cd-contaminated soil. Implication. Zinc treatments, especially the combination of soil Zn application and seed Zn-priming, should be recommended for wheat grown on Cd-contaminated soil.

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引种和土壤施锌降低了标准小麦和生物强化锌小麦籽粒镉的积累

抽象的上下文。镉(Cd)是一种对植物和人类都有毒的金属。在镉污染的土壤上生长的小麦可能在籽粒中积累有毒水平的镉。的目标。本研究旨在比较土壤施锌和种子施锌对镉胁迫下普通小麦和生物强化锌小麦籽粒镉浓度的影响。方法。标准小麦品种(Jauhar-2016)和生物强化锌小麦品种(zincoll -2016)种植在充满镉添加土壤(8 mg Cd kg - 1)的盆栽中。施锌量为8 mg kg - 1和不施锌量为8 mg kg - 1的试验处理分别为无锌、氢锌和锌处理。关键的结果。锌处理显著减轻了镉对两个品种生长和生理参数的毒害作用。与对照相比，各锌处理均显著提高了各品种籽粒锌含量，显著降低了镉含量。施锌+土壤锌处理，籽粒锌浓度平均较对照最大增幅约为36%。与对照相比，同样的处理使Zincol-2016籽粒Cd浓度降低了42%，Jauhar-2016籽粒Cd浓度降低了35%。Jauhar-2016年各Zn处理和zincoll -2016年Zn +土壤Zn处理的籽粒Cd浓度均在允许值(≤0.2 mg kg - 1)以内。结论。土壤施锌、种子补锌及其组合对降低镉污染土壤上小麦籽粒镉积累有显著效果。暗示。对镉污染土壤上的小麦，建议采用土壤施锌与种子补锌相结合的锌处理。

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来源期刊

Crop & Pasture Science AGRICULTURE, MULTIDISCIPLINARY-

CiteScore

4.20

自引率

15.80%

发文量

111

审稿时长

3 months

期刊介绍： Crop and Pasture Science (formerly known as Australian Journal of Agricultural Research) is an international journal publishing outcomes of strategic research in crop and pasture sciences and the sustainability of farming systems. The primary focus is broad-scale cereals, grain legumes, oilseeds and pastures. Articles are encouraged that advance understanding in plant-based agricultural systems through the use of well-defined and original aims designed to test a hypothesis, innovative and rigorous experimental design, and strong interpretation. The journal embraces experimental approaches from molecular level to whole systems, and the research must present novel findings and progress the science of agriculture. Crop and Pasture Science is read by agricultural scientists and plant biologists, industry, administrators, policy-makers, and others with an interest in the challenges and opportunities facing world agricultural production. Crop and Pasture Science is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.

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