Обзорная статья

Microplastics may increase the environmental risks of Cd via promoting Cd uptake by plants: A meta-analysis

Fengyu HuangCollege of Environment and Resource, Xichang University, Xichang 615000, ChinaJinzhao HuCollege of Environment and Resource, Xichang University, Xichang 615000, ChinaLi ChenCollege of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China. Electronic address: [email protected]Zhe WangCollege of Environment and Resources, Southwest University of Science & Technology, Mianyang 621010, ChinaShiyong SunCollege of Environment and Resources, Southwest University of Science & Technology, Mianyang 621010, ChinaWanming ZhangCollege of Environment and Resource, Xichang University, Xichang 615000, ChinaHu JiangCollege of Environment and Resources, Southwest University of Science & Technology, Mianyang 621010, ChinaYing LuoCollege of Environment and Resources, Southwest University of Science & Technology, Mianyang 621010, ChinaLei WangCollege of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, ChinaYi ZengCollege of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, ChinaLinchuan FangCollege of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China. Electronic address: [email protected]

2023en

ABI

Аннотация

Microplastics (MPs) and cadmium (Cd) are widely distributed in soil ecosystems, posing a potential threat to agricultural production and human health. However, the coupled effects of MPs and Cd in soil-plant systems remain largely unknown, especially on a large scale. In this study, a meta-analysis was conducted to evaluate the influence of MPs on plant growth and Cd accumulation under the Cd contamination conditions. Our results showed that MPs had significantly negative effects on shoot biomass (a decrease of 11.8 %) and root biomass (a decrease of 8.79 %). MPs also significantly increased Cd accumulation in the shoots and roots by 14.6 % and 13.5 %, respectively, revealing that MPs promote plant Cd uptake. Notably, polyethylene displayed a stronger promoting effect (an increase of 29.4 %) on Cd accumulation among these MP types. MPs induced a significantly increase (9.75 %) in concentration of soil available Cd and a slight decrease in soil pH, which may be the main driver promoting plant Cd uptake. MP addition posed physiological toxicity risks to plants by inhibiting photosynthesis and enhancing oxidative damage, directly demonstrating that MPs in combination with Cd can pose synergetic toxicity risks to plants. We further noted that MPs altered microbial diversity, likely influencing Cd bioavailability in soil-plant systems. Overall, our study has important implications for the combined impacts of Cd and MPs on plants and provides new insights into developing guidelines for the sustainable use of MPs in agriculture.

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Идентификаторы

DOI: 10.1016/j.jhazmat.2023.130887

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Цитирований: 2Использованных источников: 0

Показатели — AkademScholar