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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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Effects of Pb and GSH on ultrastructure of upland cotton median leaves Transmission electron micrographs represent leaf 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), contained large central vacuole (V), well developed chloroplasts and rounded mitochondria (M). After Pb exposure (B), chloroplasts were highly dilated and plasma membrane detached from cell walls. GSH-treated leaf cells (C) demonstrated large chloroplasts and clearly located nucleus. In GSH + Pb group (D), chloroplasts were dilated but increased in number.