Photosynthetica

, Volume 46, Issue 4, pp 517–524

Acclimation of photosynthesis to temperature in Arabidopsis thaliana and Brassica oleracea

Original Papers

DOI: 10.1007/s11099-008-0088-7

Cite this article as:
Bunce, J.A. Photosynthetica (2008) 46: 517. doi:10.1007/s11099-008-0088-7

Abstract

Plants differ in how much the response of net photosynthetic rate (PN) to temperature (T) changes with the T during leaf development, and also in the biochemical basis of such changes in response. The amount of photosynthetic acclimation to T and the components of the photosynthetic system involved were compared in Arabidopsis thaliana and Brassica oleracea to determine how well A. thaliana might serve as a model organism to study the process of photosynthetic acclimation to T. Responses of single-leaf gas exchange and chlorophyll fluorescence to CO2 concentration measured over the range of 10–35 °C for both species grown at 15, 21, and 27 °C were used to determine the T dependencies of maximum rates of carboxylation (VCmax), photosynthetic electron transport (Jmax), triose phosphate utilization rate (TPU), and mesophyll conductance to carbon dioxide (gm). In A. thaliana, the optimum T of PN at air concentrations of CO2 was unaffected by this range of growth T, and the T dependencies of VCmax, Jmax, and gm were also unaffected by growth T. There was no evidence of TPU limitation of PN in this species over the range of measurement conditions. In contrast, the optimum T of PN increased with growth T in B. oleracea, and the T dependencies of VCmax, Jmax, and gm, as well as the T at which TPU limited PN all varied significantly with growth T. Thus B. oleracea had much a larger capacity to acclimate photosynthetically to moderate T than did A. thaliana.

Additional key words

chlorophyll fluorescencemesophyll conductance to CO2photosynthetic electron transportspecies differencestriose phosphate utilization ratio

Abbreviations

Ci

[CO2] in the intercellular airspace

Cc

[CO2] at ribulose-1,5-bisphosphate carboxylase/oxygenase

Chl

chlorophyll

gm

mesophyll conductance to CO2

J

rate of photosynthetic electron transport

Jmax

maximum rate of photosynthetic electron transport

KC

Michaelis constant for CO2

KO

Michaelis constant for O2

LED

light emitting diode

PN

net photosynthetic rate

PPFD

photosynthetic photon flux density

RuBPCO

ribulose-1,5-bisphosphate carboxylase/oxygenase

T

temperature

TPU

triose phosphate utilization

VCmax

the maximum rate of carboxylation of RuBPCO

ΔHa

energy of activation

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.USDA-ARS Crop Systems and Global Change LaboratoryBeltsvilleUSA