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. 2020 May 30;21(11):3912. doi: 10.3390/ijms21113912

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© 2020 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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Photosynthetic parameters in Italian (IT, red bars) and Bulgarian (BG, blue bars) populations of P. orientalis plants under control (FTSW = 95%) and drought (FTSW = 28%) conditions and after re-watering (FTSW = 90%R). CO₂ saturated photosynthetic rate (A_sat, panel A), mesophyll conductance (g_m, panel B), chloroplastic [CO₂] at C_i = 400 ppm (C_c, panel C), maximum carboxylation rate of Rubisco (V_cmax, panel D), maximum rate of photosynthetic electron transport (J_max, panel E), triose phosphate utilization (TPU, panel F), carboxylation rate (v_c, panel G), oxygenation rate (v_o, panel H) and photorespiration rate (R_p, panel I). Data are means ± SE of eight independent samples. Statistically significant differences (Tukey’s test, p < 0.05) between the IT and BG ecotypes are indicated by different letters.