Figure 7.

Growth yield of photosynthetic reductant, calculated as the ratio of the reductant generated from O₂ evolution (electron transport rate [ETR]) to the reductant required for producing cells at the observed growth rates (Eq. 9, “Materials and Methods”), in high-Ci (black symbols, solid line) and low-Ci (white symbols, dashed line) cells measured at various times relative to the shift from LL to HL. The values of separate cultures grown under HL continuously are shown at time = ∞ and connected to the light-shifted cells by dotted lines (values are means, n = 6 ± SEM).