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The quantum yields of PSII photochemistry (ΦPSΙΙ), the regulated heat dissipation (ΦNPQ), and the non-regulated energy dissipation (ΦNO), measured at 900 μmol photons m−2 s–1; of control (con) and 5 days Cd-treated Salvia sclarea plants. Error bars are standard deviations (n = 6). Means between the two treatments that are statistically different (p < 0.05) are marked by an asterisk (*).
