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• W2969234857 abstract "Heavy metals inevitably cause invisible or visible damage to plants, leading to significant economic losses. Therefore, it is necessary to develop a method for timely monitoring the damage of plants under the stress of heavy metals. Here, vitronectin-like proteins (VN) on the surface of plant cells is as an important biomarker for monitoring damage of plants under the stress of heavy metals. A living plant cell-based biosensor is constructed to monitor invisible damage of plant cells induced by cadmium [Cd(II)] or lead [Pb(II)]. To fabricate this sensor, l-cysteine was first modified on the glassy carbon electrode followed by the modification of anti-IgG-Au antibody. Then, the living plant cells, incubated with the anti-VN, were modified onto the electrode. The sensor worked by determining the change in electrochemical impedance. Cd(II) and Pb(II) was detected in the linear dynamic range of 45-210 and 120-360 μmol·L-1, respectively. And the detection limit of Cd(II) and Pb(II) of this biosensor was 18.5 nmol·L-1 [with confidence interval (95%) 18.4-18.6 nmol·L-1] and 25.6 nmol·L-1 [with confidence interval (95%) 25.4-25.8 nmol·L-1], respectively. In both Arabidopsis and soybean, when the content of VN increased by about 20 times under the stress of Cd(II) or Pb(II), which means when the electron-transfer resistance increased by 35%, chlorophyll content showed significant decrease about 17%. Therefore, by establishing a quantitative relationship among the content of biomarker, the electron-transfer resistance and chlorophyll content in plant cells, the invisible damage of plants under the stress of heavy metals was detected. These results can provide a reference method for early-onset warning systems for heavy metal pollution in the environment." @default.
• W2969234857 created "2019-08-29" @default.
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• W2969234857 date "2019-12-01" @default.
• W2969234857 modified "2023-10-16" @default.
• W2969234857 title "A living plant cell-based biosensor for real-time monitoring invisible damage of plant cells under heavy metal stress" @default.
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• W2969234857 doi "https://doi.org/10.1016/j.scitotenv.2019.134097" @default.
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