Fig. 4.
Relationship between (a) non-photochemical quenching (NPQ) and (b) maximum quantum yield of PSII (Fv:Fm) and triacylglycerol (TAG) concentration in leaves of four plant species under shading and drought. Plants in full-sunlight treatments are represented by circles, whereas plants in shaded treatments are represented by inverted triangles. Fluorescence was not measured on the same leaves as lipid concentration, but leaves for lipid determination were collected in the same week as fluorescence measurements.