Figure 1. The relationship between maximum photosynthetic performance and seasonal maintenance in the unfavorable season in seed plants (compiled data).

(a) Absolute or (b) relative (percent) seasonal decrease in net photosynthetic rates (A_a) in relation to A_a in the relatively favorable season (Summer or wet season). Absolute (c) or relative (percent) (d) dry season decrease in A_a in relation to wet season/winter A_a. Absolute (e) or relative (percent) (f) winter decrease in A_a in relation to summer A_a. Data are compiled from the literature (Table S1). Lines are standardized major axis (SMA) lines fitted to the data.