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. 2021 Nov 4;12:726186. doi: 10.3389/fpls.2021.726186

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Copyright © 2021 Igarashi, Yi and Yano.

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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Growth responses for nitrate-N supply in C₃ wheat and C₄ guinea grass is grown for 28 d in the chambers under ambient (aCO₂) or elevated (eCO₂) CO₂ treatments. Relative growth rate (A,B), net assimilation rate (C,D), leaf area ratio (E,F), plant biomass (G,H), cumulative transpiration (I,J), and water-use efficiency (K,L).