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

Zhou, Jun; Zhang, Chen; Du, Buyun; Cui, Hongbiao; Fan, Xingjun; Zhou, Dongmei; Zhou, Jing

doi:10.1016/j.envpol.2020.115045

Cited by 83 publications

(34 citation statements)

References 60 publications

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“…According to the land-use map of Fengcheng (Figure 5), urban road traffic networks are mainly concentrated in central and northern areas, while emerging industrial parks, mainly featuring new energy, photovoltaic electronics, and machinery industries, are located in the center of the city. Cd and Hg have therefore accumulated in this region as a result of human factors, and that is consistent with Zhou's conclusion that compared with natural factors, human activities release more partition content into soil, which is more likely to affect crop growth retardation (Zhou et al, 2020;Boussen et al, 2013). The area with the highest Cd concentration was located near the dense urban roads, close to mining land.…”

Section: Discussionsupporting

confidence: 86%

“…Sources of heavy metal pollution in farmland soils are diverse, possibly from industry, sewage irrigation, urban activities or general agricultural practices (Jiang et al, 2018). The level of heavy metal pollution in farmland soil is closely associated with the quality and safety of agricultural products as well as severe ecological risks related to the toxicity, persistence, and bioaccumulation characteristics of heavy metals (Barlas et al, 2005;Ihedioha et al, 2016;Zhou et al, 2020). By entering the food chain, heavy metal pollutants also have an eventual effect on human health (Mazej et al, 2010;Hu et al, 2017;Liu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Huang

Xiao-min

et al. 2021

Front. Environ. Sci.

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Due to the irreversibility of heavy metal pollution, the presence of heavy metals in farmland soil is associated with severe ecological risks that endanger both the environment and human health. Cadmium (Cd) and mercury (Hg) are two toxic heavy metals found widely in polluted soil. Cd is not readily fixed in the soil and is therefore easily accumulated by plants, while Hg has a wide range of pollution sources. The aims of this study were to explore the spatial variation in Cd and Hg concentrations in farmland soil in Poyang Lake Plain, China, and to assess their potential ecological risks as influenced by natural and human factors. A total of 283 soil samples were obtained from Fengcheng city, central Jiangxi Province. Data were then analyzed using geostatistics, the potential ecological risk index, Pearson’s correlation analysis, and Geodetector. The results showed moderate variation in soil Cd and Hg concentrations, with a remarkable difference in their spatial distribution. Cd concentrations in the northwest and northeast of Fengcheng were below the regional background level in Jiangxi; in most remaining areas, Cd concentrations were between the regional background level and national risk screening value. Areas with Hg concentrations lower than the regional background level were largely concentrated in the south, east and north of Fengcheng, and gradually increased towards the central, where they exceeded the regional background level but were below the national risk screening value. Overall, the potential ecological risk level of Cd was predominantly low, while that of Hg was moderate. The comprehensive potential ecological risk was low in most areas for both Cd and Hg, with some scattered areas of moderate risk. Moreover, the comprehensive potential ecological risk index of both Cd and Hg was significantly correlated with soil pH, total phosphorous, elevation, distance from a river (p < 0.01), and distance from a road (p < 0.05). The most significant factor influencing the comprehensive potential ecological risk index of these two heavy metals was soil pH of 5.2–5.6, followed by total p ≤ 0.52 mg kg−1. In conclusion, moderate pollution of Cd and Hg occurred in farmland soil in Poyang Lake Plain where their comprehensive potential ecological risk level was generally low and mainly influenced by soil pH and total phosphorous.

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Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Huang

Xiao-min

et al. 2021

Front. Environ. Sci.

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“…To a certain degree, Zn absorption depends on the size of the available Zn pool in the soil (Liu et al 2019); therefore, Zn fertilization is an effective strategy to increase Zn concentrations in the soil. However, Zn toxicity is harmful to plants and can occur when the Zn content in plant tissues exceeds the content required or when the soil contains excess Zn, which is detrimental to soil quality (Nair & Chung 2017;Garcia-Gomez et al 2018;Liu et al 2020) and can even cause environmental pollution (Zhou et al 2020). Consequently, although it is necessary to increase the output of crops or trees via fertilization, precise management of nutrients is vital for sustainable production in agriculture and forestry, especially with respect to the maintenance of microelements, which help promote fruit set, yield and quality.…”

Section: Introductionmentioning

confidence: 99%

“…Evidence that Zn deficiency causes abiotic stress and severely affects plant growth has been reported (Habib 2009;Rafique et al 2015;Zhao et al 2020), and some physiological effects have been studied (Ebrahim & Aly 2005;Wang & Jin 2005;White & Broadley 2011). For instance, Zn applications increase activity of antioxidant enzymes in wheat, alleviate oxidative stress and improve plant growth (Zhou et al 2020). In addition, Zn fertilization of maize improved the chlorophyll (Chl) content, metabolism of reactive oxygen species (ROS) and the water-use efficiency (WUE), which increased maize yields (Zhang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Effects of zinc application on the growth and photosynthetic characteristics of pecan at the seedling stage

et al. 2021

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Pecan (Carya illinoinensis) is sensitive to Zn, which is involved in basic physiological and biochemical processes.• To explore the growth and physiology of pecan in response to Zn application, we used 1-year-old annual grafted seedlings (Pawnee) and applied four concentrations of Zn fertilizer (0.05, 0.10, 0.20 and 0.40 gÁplant À1 ); a control (CK; no Zn fertilization) was also included. The growth characteristics, anatomical structure of the leaves and photosynthesis were assessed.• Compared with the CK, photosynthesis and chlorophyll (Chl) fluorescence parameters, leaf area and leaf structure significantly increased at Zn concentrations of 0.05 and 0.10 gÁplant À1 . In addition, growth of pecan at the seedling stage increased in response to moderate Zn application. In contrast, treatment with 0.20 and 0.40 gÁZnÁplant À1 dramatically decreased these physiological indices and inhibited pecan growth.• The results show that moderate soil Zn application promotes pecan growth and development by increasing photosynthesis. However excess Zn concentrations were not conducive to seedling growth. The concentration of 0.1 gÁZnÁplant À1 was best when considering long-term soil Zn applications, providing a theoretical foundation for microelement management of pecan.

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“…Moderate Fe application eliminates Cd-induced decrease in net photosynthetic rate as well as the disorder of antioxidant systems [ 40 ]. Foliar Zn application reduces root Cd translocation to shoots, while soil Zn application contributes to the reduction of root Cd concentrations [ 41 ]. Under both high Cd and low Cd, only the concentrations of Mn 2+ were remarkably changed in both shoots and roots (Fig.…”

Section: Discussionmentioning

confidence: 99%

Integrated ionomic and transcriptomic dissection reveals the core transporter genes responsive to varying cadmium abundances in allotetraploid rapeseed

et al. 2021

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Background Oilseed rape (B. napus L.) has great potential for phytoremediation of cadmium (Cd)-polluted soils due to its large plant biomass production and strong metal accumulation. Soil properties and the presence of other soluble compounds or ions, cause a heterogeneous distribution of Cd. Results The aim of our study was to reveal the differential responses of B. napus to different Cd abundances. Herein, we found that high Cd (50 μM) severely inhibited the growth of B. napus, which was not repressed by low Cd (0.50 μM) under hydroponic culture system. ICP-MS assays showed that the Cd2+ concentrations in both shoots and roots under 50 μM Cd were over 10 times higher than those under 0.50 μM Cd. Under low Cd, the concentrations of only shoot Ca2+/Mn2+ and root Mn2+ were obviously changed (both reduced); under high Cd, the concentrations of most cations assayed were significantly altered in both shoots and roots except root Ca2+ and Mg2+. High-throughput transcriptomic profiling revealed a total of 18,021 and 1408 differentially expressed genes under high Cd and low Cd conditions, respectively. The biological categories related to the biosynthesis of plant cell wall components and response to external stimulus were over-accumulated under low Cd, whereas the terms involving photosynthesis, nitrogen transport and response, and cellular metal ion homeostasis were highly enriched under high Cd. Differential expression of the transporters responsible for Cd uptake (NRAMPs), transport (IRTs and ZIPs), sequestration (HMAs, ABCs, and CAXs), and detoxification (MTPs, PCR, MTs, and PCSs), and some other essential nutrient transporters were investigated, and gene co-expression network analysis revealed the core members of these Cd transporters. Some Cd transporter genes, especially NRAMPs and IRTs, showed opposite responsive patterns between high Cd and low Cd conditions. Conclusions Our findings would enrich our understanding of the interaction between essential nutrients and Cd, and might also provide suitable gene resources and important implications for the genetic improvement of plant Cd accumulation and resistance through molecular engineering of these core genes under varying Cd abundances in soils.

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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

Cited by 83 publications

References 60 publications

Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Effects of zinc application on the growth and photosynthetic characteristics of pecan at the seedling stage

Integrated ionomic and transcriptomic dissection reveals the core transporter genes responsive to varying cadmium abundances in allotetraploid rapeseed

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