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. 2020 Dec 21;11:595095. doi: 10.3389/fpls.2020.595095

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Copyright © 2020 Ou, Cui, Zhu, Guo, Liu and Yang.

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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Photosynthetic (A,D) and sugar contents (B,C,E,F) of P. notoginseng seedlings in pot under the conditions of different N and K application ratios. Chl a + b, chlorophyll a + b; Pn, net photosynthesis rate; Ti, transpiration rate; Ci, intercellular CO₂ concentration; Gs, stomatal conductance; Glu, glucose; Suc, sucrose; TSS, total soluble sugar. All data represent means ± SDs, n = 4; different small letters above the column represent significant difference among the four treatments at p < 0.05.