Differential effects of pH on cadmium accumulation in Artemisia argyi growing in low and moderately cadmium-contaminated paddy soils

IF 5.2 2区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Chemical and Biological Technologies in Agriculture Pub Date : 2024-10-28 DOI:10.1186/s40538-024-00690-x
Ze Zhang, Jia-shun Zhong, Xin-zhi Guo, Chao Xu, Dao-you Huang, Jing Liu, Xin-sheng Chen
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Abstract

Background

Phytoremediation is affected by physical and chemical properties of the soil such as soil pH, moisture, and nutrient content. Soil pH is a key element influencing Cd bioavailability and can be easily adjusted in agricultural practices. The soil pH level may relate to the effectiveness of phytoremediation; however, this has not been extensively investigated. In the current study, we evaluated the effect of Cd contamination level (0.56 and 0.92 mg/kg) and soil pH (5, 6, and 7) on Cd accumulation and allocation in Artemisia argyi, a fast-growing perennial crop.

Results

Our results indicated that higher soil Cd concentrations reduce A. argyi biomass, and the loss of the root mass was particularly significant. Higher soil pH decreased Cd content in stems and roots of A. argyi cultivated in moderately Cd-polluted soil, and increased Cd content in stems and roots of the plant grown in low Cd-polluted soil. Higher soil pH decreased the percentage of Cd distributed in the soluble fraction and cell walls and increased the percentage of Cd in the organelles of leaf cells for moderate soil Cd levels. The bioconcentration and translocation factor exceeded 4.0 and 1.0, respectively, across all tested treatments, indicating that A. argyi is a promising candidate for phytoremediation. Notably, the effects of soil pH on Cd accumulation and subcellular distribution in A. argyi differed between low and moderately Cd-contaminated soils.

Conclusion

Adjustments to soil pH based on the degree of Cd contamination can enhance Cd extraction by A. argyi, thereby reducing the overall remediation cycle of cadmium-polluted paddy fields of South China.

Graphical Abstract

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pH 值对生长在低度和中度镉污染稻田土壤中的艾蒿镉积累的不同影响
背景植物修复受土壤物理和化学特性的影响,如土壤 pH 值、水分和养分含量。土壤 pH 值是影响镉生物利用率的关键因素,在农业实践中很容易调整。土壤酸碱度可能与植物修复的效果有关,但这一问题尚未得到广泛研究。在本研究中,我们评估了镉污染水平(0.56 和 0.92 毫克/千克)和土壤 pH 值(5、6 和 7)对多年生速生作物阿尔基蒿的镉积累和分配的影响。土壤 pH 值越高,在中度镉污染土壤中栽培的旱金莲茎和根中的镉含量越低,而在低镉污染土壤中栽培的旱金莲茎和根中的镉含量则越高。在土壤镉含量中等的情况下,土壤 pH 值越高,分布在可溶性部分和细胞壁中的镉百分比越低,而分布在叶细胞器中的镉百分比则越高。在所有测试处理中,A. argyi 的生物浓缩系数和易位系数分别超过了 4.0 和 1.0,这表明 A. argyi 是一种很有前景的植物修复候选材料。结论根据镉污染程度调整土壤pH值可提高箭毒的镉萃取能力,从而缩短华南地区镉污染稻田的整体修复周期。 图文摘要
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来源期刊
Chemical and Biological Technologies in Agriculture
Chemical and Biological Technologies in Agriculture Biochemistry, Genetics and Molecular Biology-Biotechnology
CiteScore
6.80
自引率
3.00%
发文量
83
审稿时长
15 weeks
期刊介绍: Chemical and Biological Technologies in Agriculture is an international, interdisciplinary, peer-reviewed forum for the advancement and application to all fields of agriculture of modern chemical, biochemical and molecular technologies. The scope of this journal includes chemical and biochemical processes aimed to increase sustainable agricultural and food production, the evaluation of quality and origin of raw primary products and their transformation into foods and chemicals, as well as environmental monitoring and remediation. Of special interest are the effects of chemical and biochemical technologies, also at the nano and supramolecular scale, on the relationships between soil, plants, microorganisms and their environment, with the help of modern bioinformatics. Another special focus is the use of modern bioorganic and biological chemistry to develop new technologies for plant nutrition and bio-stimulation, advancement of biorefineries from biomasses, safe and traceable food products, carbon storage in soil and plants and restoration of contaminated soils to agriculture. This journal presents the first opportunity to bring together researchers from a wide number of disciplines within the agricultural chemical and biological sciences, from both industry and academia. The principle aim of Chemical and Biological Technologies in Agriculture is to allow the exchange of the most advanced chemical and biochemical knowledge to develop technologies which address one of the most pressing challenges of our times - sustaining a growing world population. Chemical and Biological Technologies in Agriculture publishes original research articles, short letters and invited reviews. Articles from scientists in industry, academia as well as private research institutes, non-governmental and environmental organizations are encouraged.
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