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| Effects of foliar spraying calcium oxide nanoparticles on cadmium accumulation and physiological response in coriander and spinach under cadmium stress |
| Received:August 19, 2024 |
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| KeyWord:cadmium;CaONPs;coriander;spinach;foliar spraying |
| Author Name | Affiliation | E-mail | | TANG Xiaoyue | School of Environment, Sichuan Agricultural University, Chengdu 611130, China | | | LI Hanyun | School of Environment, Sichuan Agricultural University, Chengdu 611130, China | | | CHEN Fei | School of Environment, Sichuan Agricultural University, Chengdu 611130, China | | | XU Xiaoxun | School of Environment, Sichuan Agricultural University, Chengdu 611130, China
Key Laboratory of Soil Environment Protection of Sichuan Province, Chengdu 611130, China | xuxiaoxun2013@163.com | | QI Xin | School of Environment, Sichuan Agricultural University, Chengdu 611130, China
Key Laboratory of Soil Environment Protection of Sichuan Province, Chengdu 611130, China | | | ZHANG Shirong | School of Environment, Sichuan Agricultural University, Chengdu 611130, China
Key Laboratory of Soil Environment Protection of Sichuan Province, Chengdu 611130, China | |
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| Abstract: |
| To safeguard food security, this research conducted field trials to investigate the impact of foliar applications of three different concentrations（25, 100, 400 mg · L-1）of nano-calcium oxide（CaONPs）on Cd uptake and the physiological attributes of coriander and spinach in soils contaminated with Cd（0.526 mg · kg-1）. The findings revealed that foliar sprays of varying concentrations of CaONPs significantly decreased the Cd content in the above-ground parts of both coriander and spinach, with the highest reductions reaching 35.21% and 43.34%, respectively. Treatment with 400 mg · L-1 of CaONPs led to a 23.60% and 21.64% decrease in Cd translocation coefficients for the two vegetables. Concurrently, the application of CaONPs notably enhanced the fresh weight and chlorophyll b content in coriander and spinach（P<0.05）. At a spray concentration of 200 mg · L-1 of CaONPs, the malondialdehyde（MDA）content in both vegetables was significantly decreased（P<0.05）, with spinach exhibiting a more pronounced reduction. Furthermore, the activities of superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase in these vegetables were variously augmented under different CaONPs concentrations. Notably, spinach showed the most significant increase in peroxidase activity, up to 37.60%. In summary, the foliar application of CaONPs effectively curtailed the uptake and translocation of Cd in coriander and spinach, and modulated their physiological and biochemical responses under Cd stress. |
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