Related Experiment Video
Updated: May 3, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
Published on: December 16, 2019
A correlation between changes in luminescence decay kinetics and the appearance of a CO2-accumulating mechanism in
K Palmqvist1, L G Sundblad, G Samuelsson
1Department of Plant Physiology, University of Umeå, S-901 87, Umeå, Sweden.
Abstract:
In experiments with the unicellular green algae Scenedesmus obliquus a correlation was found between the presence of the CO2-accumulating mechanism and the appearance of polyphasic luminescence decay kinetics. A potentiometric titration method was used to measure and calculate photosynthetic carbon uptake.Polyphasic luminescence decay kinetics was found when the algae showed photosynthetic characteristics typical of algae adapted to low-CO2 conditions. When high-CO2 grown algae were transferred to low-CO2 conditions they gradually developed polyphasic decay kinetics during the first 25-30 minutes. When low-CO2 grown algae were transferred to high-CO2 conditions the polyphasic decay kinetics disappeared. To account for these results a working hypothesis is presented on the basis of the energy requirement for a CO2-accumulating mechanism.
More Related Videos
Related Concept Videos
Variables Affecting Phosphorescence and Fluorescence
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Photoluminescence: Applications
The Calvin Benson Cycle
Gene Regulation in Microbial Communities: Quorum Sensing

