Fig. 2.

Changing chlorophyll concentration, CO₂ dependent O₂ evolution and dark respiration along the length of 7 day old primary wheat leaves. Chlorophyll concentration was measured on a (a) spatial, and (b) temporal scale. (c) CO₂ dependent O₂ evolution was measured using a leaf disc electrode at saturating concentration of CO₂. (d) Dark respiration was also measured using a leaf disc electrode. Data points represent the mean of at least 3 independent growth studies, sampling at least 5 seedlings per replicate. Error bars show ±SE of the mean.