Acclimation of photosynthesis to low temperature in Spinacia oleracea L. I. Effects of acclimation on CO2 assimilation and carbon partitioning

Martindale, Wayne and Leegood, R.C. (1997) Acclimation of photosynthesis to low temperature in Spinacia oleracea L. I. Effects of acclimation on CO2 assimilation and carbon partitioning. Journal of Experimental Botany, 48 (315). pp. 1865-1872. ISSN 00220957

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Acclimation of photosynthesis to low temperature in Spinacia oleracea L. I. Effects of acclimation on CO2 assimilation and carbon partitioning

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Abstract

Acclimation of spinach plants grown at 25 °C to a temperature of 10°C for 10 d resulted in an increased capacity for leaf photosynthesis in saturating light and CO2, but not at ambient CO2 concentrations. Gas exchange and chlorophyll fluorescence measurements indicated that acclimation was accompanied by an increased capacity for the regeneration of ribulose-1,5-bisphosphate. Changes in starch, soluble carbohydrates and activities of sucrose-P synthase and ADP-glucose pyrophosphorylase were measured during the acclimation process. There was an initial increase in starch and sucrose during the first 2 d, but these then declined. There was an increase in the capacity for sucrose synthesis during low temperature acclimation, evidenced by an increase in the maximum activity of sucrose-P synthase activity and an increase in partitioning of 14CO2 into sucrose, but there was no increase in the activity of ADP-glucose pyrophosphorylase or carbon partitioning into starch.

Additional Information:cited By 34
Keywords:Spinacia oleracea, photosynthesis, enzyme activity
Subjects:C Biological Sciences > C110 Applied Biology
C Biological Sciences > C730 Metabolic Biochemistry
D Veterinary Sciences, Agriculture and related subjects > D400 Agriculture
Divisions:College of Science > National Centre for Food Manufacturing
ID Code:33775
Deposited On:27 Nov 2018 16:16

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