Premium
Temperature response of in vivo R ubisco kinetics and mesophyll conductance in Arabidopsis thaliana : comparisons to Nicotiana tabacum
Author(s) -
WALKER BERKLEY,
ARIZA LOREN S.,
KAINES SARAH,
BADGER MURRAY R.,
COUSINS ASAPH B.
Publication year - 2013
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12166
Subject(s) - rubisco , nicotiana tabacum , arabidopsis thaliana , photosynthesis , kinetics , biology , botany , stomatal conductance , biophysics , biochemistry , chemistry , mutant , gene , physics , quantum mechanics
Biochemical models of photosynthesis use the temperature dependency of ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) kinetics and mesophyll conductance to CO 2 ( g m ). However, the in vivo temperature response of Rubisco kinetics and g m has only been measured in the warm adapted Nicotiana tabacum; therefore, we determined these parameters in the cool‐adapted Arabidopsis thaliana to see how species‐dependent differences impact modeled rates of photosynthesis. While the individual Rubisco kinetic parameters in N. tabacum and A. thaliana were similar across temperatures, they collectively resulted in significantly different modeled rates of photosynthesis. Additionally, g m increased with temperature in N. tabacum but not in A. thaliana . Commentary: New challenges in modeling photosynthesis: temperature dependencies of Rubisco kinetics