Fig. 7. Physiological parameters of M. halliana under saline–alkali stress:
a net photosynthetic rate (Pn); b stomatal conductance (Gs); c transpiration rate (Tr); d Chl a content (Chl a); e Chl b content (Chl b); f carotenoid content (Car); g initial fluorescence (F0); h maximum fluorescence (Fm); i maximal photochemical efficiency (Fv/Fm); j nonregulatory energy dissipation (Y(NO)); k light-induced nonphotochemical quenching (NPQ); l photochemical quenching coefficient (qN)