Related Experiment Video
Updated: Jun 25, 2026

Using Changes in Leaf Transmission to Investigate Chloroplast Movement in Arabidopsis thaliana
Published on: July 14, 2021
Energy Supply and Light-enhanced Chloride Uptake in Wheat Laminae
I R Macdonald1, A E Macklon, R W Macleod
1Department of Plant Physiology, The Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen, AB9 2QJ Scotland.
Abstract:
The light-supported component of (36)Cl uptake from 5 mM K(36)Cl by green laminae, either chopped or vacuum-infiltrated, of Triticum aestivum L. seedlings has been determined by subtraction of dark uptake values from light uptake values and the energy sources for the uptake elucidated on the basis of the effects of 3-(3,4-dichlorophenyl)-1,1 dimethylurea (DCMU), carbonyl cyanide p-trifluoromethoxy-phenylhydrazone (FCCP), antimycin A(1) (AA), and N(2) on light and dark uptake. The light-supported Cl(-1) uptake is shown to be partially inhibited by DCMU or AA but unaffected or stimulated by FCCP or N(2). There is no additive effect on inhibition caused by DCMU + N(2) or FCCP + AA but there is an added inhibition caused by DCMU + AA, DCMU + FCCP, and by FCCP or AA in anaerobic conditions. The effect of these inhibitors on photosynthetic gas exchange of chopped tissue has also been determined. On the basis of the results it is concluded that the uptake of Cl(-), supported in the dark by oxidative phosphorylation, is enhanced by light and may be supported by cyclic and non-cyclic electron-flow energy. Uptake is not obligatorily linked to any one energetic pathway and there may be switching from one source to another.
More Related Videos
Related Concept Videos
Light as Energy
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
Light Acquisition
Short-distance Transport of Resources
Adaptations that Reduce Water Loss
Responses to Drought and Flooding
Responses to Salt Stress

