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. 2019 Jun 12;10:784. doi: 10.3389/fpls.2019.00784

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Copyright © 2019 Wang and Ning.

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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Transmission electron micrographs of bundle sheath cells with starch granules in ear leaves of phosphorus deficient (P0) and sufficient (P150) maize at 08:00 and 17:00 h of silking and 21 DAS in 2016. Arrows indicate the starch granules. BS, bundle sheath cell; Chl, chloroplast; and MC, mesophyll cell. Scale bars represent 5 μm.