Figure 8. Growth characteristics and photosynthetic performance of tap38 mutant plants.

(A) Phenotypes of 4-wk-old tap38-1, tap38-2, and WT plants grown under low-light conditions (80 µmol m⁻²s⁻¹) on a 12 h/12 h light/dark regime. (B) Growth curve. Leaf areas of 20 plants of each genotype (WT, grey bars; tap83-1, white bars; tap38-2, light grey bars) were measured over a period of 4 wk after germination. Mean values ± standard deviations (SDs; bars) are shown. (C and D), Measurements of light dependence of the photosynthetic parameter 1-qP (C) and effective quantum yield of PSII (ΦII; [D]) of plants grown as in (A). WT, filled grey circles; tap38-1, open circles; tap38-2, filled light-grey circles; oeTAP38, filled black circles; PAR, photosynthetically active radiation in µmol m⁻² s⁻¹. Average values were determined from five independent measurements (SD<5%).