Effect of selenium on the uptake kinetics and accumulation of and oxidative stress induced by cadmium in Brassica chinensis

Ecotoxicology and Environmental Safety
Yao YuHuafen Li

Abstract

Pak choi can readily accumulate cadmium (Cd) into its edible parts; this can pose a threat to human health. Although not essential for higher plants, selenium (Se) can be favorable for plant growth and antioxidative defense under heavy metal stress conditions. A pak choi hydroponic experiment was conducted to investigate the effect of two forms of Se on the Cd uptake kinetics and accumulation and oxidative stress. The results showed that selenite and selenate remarkably enhanced Cd uptake kinetics in pak choi. The maximum Cd uptake rate increased by more than 100% after treatment with 5 µM of selenite and selenate, and it further increased after treatment with 20 µM of both Se forms. The effects of Se on Cd content depended on the Se form, exposure time, and Cd dosage. Selenite reduced the Cd content in shoots by 41% after 3 days of treatment with 10 µM Cd, whereas selenate increased this rate by 89%. Both forms of Se decreased Cd content in the shoots by 40% after 7 days of treatment with 10 µM Cd, but they increased the Cd content by approximately 30% after treatment with 50 µM Cd. Se enhanced Cd-induced oxidative stress in pak choi. Malondialdehyde (MDA) generation was promoted by more than 33% by selenite and selenate treat...Continue Reading

Citations

Apr 12, 2019·Environmental Science and Pollution Research International·Yanan WanHuafen Li
Jan 1, 2020·Environmental Science and Pollution Research International·Xiao YanJinyan Dong
Jun 27, 2019·Environmental Science and Pollution Research International·Yao YuHua-Fen Li
Sep 30, 2020·Environmental Science and Pollution Research International·Baohong YuJinyan Dong
Apr 16, 2021·Environmental Science and Pollution Research International·Kang WangYanan Wan
Jul 28, 2021·Environmental Science and Pollution Research International·Mingxing QiDongli Liang
Jun 3, 2020·Ecotoxicology and Environmental Safety·Vinicius Martins SilvaAndré Rodrigues Dos Reis

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