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. 2019 Apr 2;8(4):85. doi: 10.3390/plants8040085

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Relationship between stomatal conductance (g_s) and $\frac{{A H}_{s}}{C_{s}}$ for switchgrass grown under ambient and elevated O₃ concentrations measured on DOY 206 and DOY 225 in 2018, where A is net CO₂ assimilation rate (µmol (CO₂) m⁻² s⁻¹), H_s is relative humidity (Pa (air) Pa (Saturated)⁻¹) and C_s is CO₂ concentration (Pa (CO₂) Pa (air)⁻¹) at the leaf surface. The data were fitted by linear regressions.