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. 2021 Jul 9;12:704985. doi: 10.3389/fpls.2021.704985

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Copyright © 2021 Zou, Liu, Hu, Zhang, Fu, Zhang, Huang, Lei, Zhang, Miao, Meng, Jiang, Liu, Yin and Liang.

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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The sampling diagram of Ginkgo roots. The red circles (A,B,C) represented the Ginkgo roots’ sampling sites, which were evenly located around the tree, 1.5 m horizontally away from the trunk and 1 m deep underground.