Journal
PLANT CELL AND ENVIRONMENT
Volume 36, Issue 12, Pages 2108-2119Publisher
WILEY
DOI: 10.1111/pce.12166
Keywords
CO2; photosynthesis
Categories
Funding
- National Science Foundation [ARRA Funds] [0842182]
- Achievement Reward for College Scientists Seattle chapter
- National Science Foundation Major Research Instrumentation grant [0923562]
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [0842182] Funding Source: National Science Foundation
Ask authors/readers for more resources
Biochemical models are used to predict and understand the response of photosynthesis to rising temperatures and CO2 partial pressures. These models require the temperature dependency of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) kinetics and mesophyll conductance to CO2 (g(m)). However, it is not known how the temperature response of Rubisco kinetics differs between species, and comprehensive in vivo Rubisco kinetics that include g(m) have only been determined in the warm-adapted Nicotiana tabacum. Here, we measured the temperature response of Rubisco kinetics and g(m) in N.tabacum and the cold-adapted Arabidopsis thaliana using gas exchange and (CO2)-C-13 isotopic discrimination on plants with genetically reduced levels of Rubisco. While the individual Rubisco kinetic parameters in N.tabacum and A.thaliana were similar across temperatures, they collectively resulted in significantly different modelled rates of photosynthesis. Additionally, g(m) increased with temperature in N.tabacum but not in A.thaliana. These findings highlight the importance of considering species-dependent differences in Rubisco kinetics and g(m) when modelling the temperature response of photosynthesis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available