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. 2017 Dec 5;8:1996. doi: 10.3389/fpls.2017.01996

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Copyright © 2017 Zhong, Chai, Xu, Li, Ma and Sun.

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) or licensor 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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Dependence of the magnitude of the nocturnal shift in the C isotope composition of leaf dark-respired CO₂ (δ¹³C_l) on (A) nighttime variation in leaf soluble sugar (mg g⁻¹) and (B) leaf starch (mg g⁻¹) in Chloris virgata (hexagon), Hemarthria altissima (semi-filled circle) and Leymus chinensis (diagonal filled square). The P values and R² of the linear relationship are provided.