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. 2020 May 13;11:473. doi: 10.3389/fpls.2020.00473

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Copyright © 2020 Xiao, Wu, Liu, Yao, Liang, Song, Ismail, Luo and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Differences in Cd tolerance of two Arabidopsis ecotypes treated with or without 10 μM CdCl₂ for 4 days. (A) Photograph of leaves showing that Ph2-23 was more sensitive to Cd stress than Tor-1. (B) Chlorophyll loss under Cd²⁺ compared to control. C_a: Chlorophyll a; C_b: Chlorophyll b; C_t: total Chlorophyll. (C) Shoot malondialdehyde (MDA) concentration in the two ecotypes under control and Cd treatment. (D) Percentage of shoot proline content under control and Cd treatment. Ctl means control treatment, with normal culture conditions; Cd means treatment with CdCl₂. Data are means of four measurements (n = 4), and the vertical bars indicate the SD. One (*) and two (**) asterisks indicate significant differences from the control at P < 0.05, and 0.01, respectively, ns, differences are not significant.