Vertical profile of photosynthetic CO₂ response within rice canopy

Abstract

Abbreviations: Ca -ambient CO2 concentration; Ca1 -critical ambient CO2 concentration for photosynthetic CO2-response curve at which the transition between Rubisco-and RuBP-limited photosynthesis occurs; Ca2 -critical ambient CO2 concentration for photosynthetic CO2-response curve at which the transition between RuBP-and TPU-limited photosynthesis occurs; Ci -intercellular CO2 concentration; Ci1 -critical intercellular CO2 concentration for photosynthetic CO2-response curve at which the transition between Rubisco-and RuBP-limited photosynthesis occurs; Ci2 -critical intercellular CO2 concentration for photosynthetic CO2-response curve at which the transition between RuBP-and TPU-limited photosynthesis occurs; FvCB -Farquhar-von Caemmerer-Berry; gm -mesophyll diffusion conductance; Jmax -maximum rate of electron transport; Pc -net photosynthetic rates limited by Rubisco activity, Pj -net photosynthetic rates limited by RuBP regeneration; PN -net photosynthetic rates; PN1 -critical net photosynthetic rate for photosynthetic CO2-response curve at which the transition between Rubisco-and RuBP-limited photosynthesis occurs; PN2 -critical net photosynthetic rate for photosynthetic CO2-response curve at which the transition between RuBP-and TPU-limited photosynthesis occurs;