FIGURE 3.

Photochemical quenching measured in the dark (qP_d) in the hypothesis of a homogeneous antenna system in Selaginella martensii acclimated to three natural light regimes. (A–C) qP_d‐light response curves of deep shade (L, dark green), intermediate shade (M, green), and high light (H, pale green) plants during 60‐min exposure to increasing actinic light intensities. (D–F) qP_d versus NPQ curves of L, M, and H plants. In all cases, some data points correspond to qP_d > 1, excluding the correctness of the homogeneous antenna model. Dashed‐gray horizontal line represents the photoinactivation threshold of qP_d = 0.98. Average values ± standard error for n = 12 (L), 16 (M), 18 (H)