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. 2019 Jun 20;10:785. doi: 10.3389/fpls.2019.00785

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Copyright © 2019 Tian, Guo, Zou, Zhang, Yu, Zhan, Ci, Wang, Wang and Si.

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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(A) Statistical analysis score plot of first and second principal components (PCs) following PC analysis (PCA) based on the parameters collected from four treatments of HY20 and HY22. (B) Enlarged view of (A) showing the detailed parameters. Arrow direction indicates the correlation among traits, and arrow length indicates the strength of the correlation. Partial abbreviations: SDW, shoot dry weight; SFW, shoot fresh weight; Chl, total chlorophyll content; TSS, total soluble sugars; SC, sucrose; FAA, free amino acids; RV, root volume; RL, root length; RSA, root surface area.