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. 2022 Aug 24;9:998946. doi: 10.3389/fnut.2022.998946

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Copyright © 2022 Ren, Zhao, Zhou, Zhou, Li, Qi, Jiang and Li.

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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Schematic from this study showing the differences in filling parameters and the response of vascular bundle structure, matter transportation, and source–sink relationship on N input levels between maize varieties ZD958 and XY335. RBS, root bleeding sap; MTE, matter transport efficiency; G_mean and G_max, mean and maximum grain filling rate; GY, grain yield. Different sizes of the same letter represent value differences.