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. 2022 Apr 25;13:866855. doi: 10.3389/fpls.2022.866855

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Copyright © 2022 Liang, Dong, Gu, Zhang, Ma and He.

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 and chlorophyll fluorescence parameters of WT and MeNPF4.5 transgenic cassava plants. (A) Photosynthetic rate (Pn). (B) Stomatal conductance (Gs). (C) Intercellular CO₂ concentration (Ci). (D) Transpiration rate (Tr). (E) Fv/Fm. (F) Y(II). (G) qN. (H) qP. Values are the means of five biological replicates ± SE. Lowercase letters above the bars (a-d) represent significant differences between treatments as determined by Student’s t-test (P < 0.05). N0, low-N treatment, 0 kg ha^–1; N1, normal N treatment, 125 kg ha^–1.