Maize responses to decreasing light intensity under different light qualities. A, Net A. The curves were fitted in order to calculate the light compensation point (Table IV). The inset shows a magnification. B, JATP, measured with the low oxygen-ETR method. C, Online Δ during photosynthesis. D, Φ resolved from Δ. Error bars represent se; n = 4. B, Blue light; G, green light; R, red light.