Figure 4.

Photosynthetic Rates and Nonphotochemical Quenching for the Wild Type, zat10(i), and 35S:ZAT10.

(A) Net CO₂ fixation (A).

(B) Linear electron transport rate through PSII (ETR).

(C) Nonphotochemical quenching (NPQ).

Parameters were measured by gas exchange analysis over increasing light intensities (photosynthetically active radiance [PAR]). Each point is the mean ± se of three to five leaves from at least three different plants. P values from t tests of the means of values for 500 to 1200 μmol photons m⁻² s⁻¹ are shown.