Fig. 4From: Anatomically induced changes in rice leaf mesophyll conductance explain the variation in photosynthetic nitrogen use efficiency under contrasting nitrogen supplyThe relationship between photosynthetic nitrogen use efficiency (PNUE) and the ratio of Rubisco to leaf N content (Rubisco/NL) (a), the difference between intercellular CO2 concentration and chloroplast CO2 concentration (Ci-Cc) (b), the ratio of mesophyll conductance to chloroplast surface area exposed to intercellular airspace (gm/Sc) (c), and the ratio of chloroplast surface area exposed to intercellular airspace to Rubisco (Sc/Rubisco) (d). Data represent the mean of 4 replicates for PNUE, Rubisco, NL, Ci, Cc, gm and at least 15 replicates for Sc. The line in the figure represents the following regression equation: y = 0.0299x – 0.0019, R2 = 0.9700, P < 0.01Back to article page