Biochar Alleviates Phytotoxicity by Minimizing Bioavailability and Oxidative Stress in Foxtail Millet (Setaria italica L.) Cultivated in Cd- and Zn-Contaminated Soil

Kang, Xirui; Geng, Nan; Xu, Li; Yu, Jinpeng; Wang, Hui; Pan, Hong; Yang, Quangang; Zhuge, Yuping; Lou, Yanhong

doi:10.3389/fpls.2022.782963

Cited by 18 publications

(16 citation statements)

References 58 publications

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“…BC application substantially improved the stability of HMs in soil and alleviates the Cd induced toxic effects on chlorophyll synthesis and photosynthesis (Zoghi et al, 2019). BC application also improved the gas exchange characteristics, and chlorophyll contents by immobilization of HMS (Mehdizadeh et al, 2019;Kang et al, 2022). The beneficial effect of BC can be seen in terms of improved physiological and biochemical traits.…”

Section: Biocharmentioning

confidence: 99%

Biochar: A promising soil amendment to mitigate heavy metals toxicity in plants

Tang

WANG

Liu

et al. 2022

Not Bot Horti Agrobo

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Heavy metals (HMs) toxicity is serious abiotic stress that is significantly reducing crop productivity and posing a serious threat to human health, soil and environmental quality. Therefore, it is urgently needed to find appropriate measures to mitigate the adverse impacts of HMs on soil, plants, humans and the environment. Biochar (BC) has emerged as an excellent soil amendment to minimize the adverse impacts of HMs and to improve soil fertility and environmental quality. Biochar application decreases HMs uptake and their translocation to plant parts by forming complexes and precipitation. Biochar also has improved soil pH, soil fertility and soil cation exchange capacity (CEC) and it also increases adsorption of HMs thus reduces their mobility and subsequent availability to plants. BC application also maintains membrane stability and improves uptake of nutrients, osmolytes accumulation, antioxidant activities, and gene expression, therefore, improves the plant performance under HMs stress. Biochar application also improves the photosynthetic performance by increasing the synthesis of photosynthetic pigments, stomata conductance and increasing the water uptake by plants. Besides this, BC also scavenges ROS by increasing the antioxidant activities, gene expression, and accumulation of proline in HMs contaminated soils. This review highlights the role of BC to mitigate the HMs toxicity in plants. We have discussed the role of BC in the modification of soil properties to induce tolerance against HMs toxicity. Moreover, we have discussed various mechanisms mediated by BC at the plant level to induce tolerance against HMs. Additionally, we also identified research gaps that must be fulfilled in future research studies.

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Section: Biocharmentioning

confidence: 99%

Biochar: A promising soil amendment to mitigate heavy metals toxicity in plants

Tang

WANG

Liu

et al. 2022

Not Bot Horti Agrobo

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“…In addition, the application of biochar improves the properties of soils and fertility and immobilizes heavy metals in soils, reducing the uptake of metals by plants [ 146 ]. Kang et al [ 147 ] stated that the application of biochar is a great way to remediate heavy metals from polluted soil. In addition, biochar applications can enhance the growth of plants.…”

Section: Reducing the Uptake Of Pb And Zn By Maizementioning

confidence: 99%

“…In addition, biochar applications can enhance the growth of plants. Biochar can decrease the availability of Zn and Pb in soils and reduce heavy metal uptake by plants [ 147 ]. In one study, the application of biochar was shown to decrease Zn by 21–28% in soil solution [ 148 ].…”

Section: Reducing the Uptake Of Pb And Zn By Maizementioning

confidence: 99%

“…In several other studies [ 149 , 150 , 151 ], biochar applications have been shown to increase soil pH, which reduces the availability of metals, due to ash accretion and the dissolution of hydroxides and carbonates present in biochar [ 148 ]. Moreover, the high CEC, organic matter, and functional groups (such as: carboxylic acid (-COOH), -C=O-, and inorganic ionic (e.g., PO 4 )) of biochar may lead to the decreased availability and uptake of metals by plants [ 147 ]. Furthermore, the porosity and large surface areas of biochar lead to the adsorption of heavy metals and reductions in the concentrations of heavy metals in soils [ 152 ].…”

Section: Reducing the Uptake Of Pb And Zn By Maizementioning

confidence: 99%

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Lead and Zinc Uptake and Toxicity in Maize and Their Management

Abedi

Gavanji

Mojiri

2022

Plants

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Soil contamination with heavy metals is a global problem, and these metals can reach the food chain through uptake by plants, endangering human health. Among the metal pollutants in soils, zinc (Zn) and lead (Pb) are common co-pollutants from anthropogenic activities. Thus, we sought to define the accumulation of Zn and Pb in agricultural soils and maize. Concentrations of Pb in agricultural soil (in Namibia) could reach 3015 mg/Kg, whereas concentrations of Zn in soil (in China) could reach 1140 mg/Kg. In addition, the maximum concentrations of Zn and Pb were 27,870 and 2020 mg/Kg in maize roots and 4180 and 6320 mg/Kg in shoots, respectively. Recent studies have shown that soil properties (such as organic matter content, pH, cation exchange capacity (CEC), texture, and clay content) can play important roles in the bioavailability of Zn and Pb. We also investigated some of the genes and proteins involved in the uptake and transport of Zn and Pb by maize. Among several amendment methods to reduce the bioavailability of Zn and Pb in soils, the use of biochar, bioremediation, and the application of gypsum and lime have been widely reported as effective methods for reducing the accumulation of metals in soils and plants.

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“…Cd contamination degree/risk depends on its concentration and fraction. Exchangeable Cd fraction is more toxic than other Cd fractions [5]; the content of Cd exchangeable fraction increases with the decrease of soil pH [6]. Moreover, Cd seriously affects the growth of soybean and potentially leads to severe impacts on public health [7,8].…”

Section: Introductionmentioning

confidence: 99%

Use of Serendipita indica to improve soybean growth, physiological properties, and soil enzymatic activities under different Cd concentrations

Wang

Fan

Wang

et al. 2022

Chem. Biol. Technol. Agric.

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Background Plants-microbial technology has been regarded as a popular and applied new technique for the remediation of cadmium (Cd) polluted soils. Methods Therefore, a pot experiment was conducted to explore the effect of Serendipita indica (S. indica) on soybean growth and the soil enzyme activities, pH and Cd chemical fractions in the soil in 0, 3, 6, and 9 mg·kg−1 Cd concentrations. Results Results reflected that compared to uninoculated treatment, S. indica inoculation can still enhance the dry weight (66.57%) and shoot length (90.35%) and promote the net photosynthesis rate (72.18%), transpiration ratio (80.73%), and stomatal conductance (119.05%) of soybean under 9 mg·kg−1 Cd stress. Furthermore, the soil pH, phosphatase (116.39%), and catalase (4.17%) activities in the S. indica treatments were increased under 3 mg·kg−1 Cd concentration. Meanwhile, S. indica could shift Cd from exchangeable fraction to other stable fractions, primarily decreased Cd contamination degree/risk in 6 mg·kg−1 Cd concentration. Conclusions This work suggested that S. indica may be a potential biotechnology for low Cd-contaminated farmland, S. indica can not only alleviate Cd phytotoxicity and promote plant growth but also improve soil quality in Cd-contaminated soils. Graphical Abstract

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Biochar Alleviates Phytotoxicity by Minimizing Bioavailability and Oxidative Stress in Foxtail Millet (Setaria italica L.) Cultivated in Cd- and Zn-Contaminated Soil

Cited by 18 publications

References 58 publications

Biochar: A promising soil amendment to mitigate heavy metals toxicity in plants

Biochar: A promising soil amendment to mitigate heavy metals toxicity in plants

Lead and Zinc Uptake and Toxicity in Maize and Their Management

Use of Serendipita indica to improve soybean growth, physiological properties, and soil enzymatic activities under different Cd concentrations

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