title: The relationship between the activation state of sucrose-phosphate synthase and the rate of CO2 assimilation in spinach leaves.
abstract: The relationship between the gas-exchange characteristics of spinach (Spinacia oleracea L.) leaves and the activation state of sucrose-phosphate synthase was examined at different intercellular partial pressures of CO2 at two different photon flux densities. There was a strong positive correlation between the activation state of sucrose-phosphate synthase and the assimilation rate. The relationship was the same at both photon flux densities, indicating that the activation state of the enzyme is determined by a product of carbon assimilation, rather than directly by light.
authors.affiliation: Robert Hill Institute and Department of Animal and Plant Sciences, University of Sheffield, S10 2TN, Sheffield, UK.
authors.forename: A
authors.initials: A
authors.lastname: Battistelli
authors.forename: M D
authors.initials: MD
authors.lastname: Adcock
authors.forename: R C
authors.initials: RC
authors.lastname: Leegood