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. 2020 Apr 15;11:412. doi: 10.3389/fpls.2020.00412

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Copyright © 2020 Khan, Samrana, Zhang, Malik, Khan and Zhu.

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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Effect of Pb and GSH on secondary root ultrastructure in upland cotton. Transmission electron micrographs show secondary roots cell morphology of control (A), 500 μM Pb (B), 50 μM GSH (C) and 500 μM Pb + 50 μM GSH (D) in cotton seedlings. Control cells (A) possessed large central vacuole (V), Golgi vesicles (G) and mitochondria (M). In Pb-treated cells (B), cell morphology was severely altered. GSH-treated roots (C) had developed cell organelles and formation of several multivesicular vesicles. In GSH + Pb (D), plasma membrane (Pm) was detached from cell wall in almost every cell.