Determining the limitations and regulation of photosynthetic energy transduction in leaves

The light-dependent production of ATP and reductants by the photosynthetic apparatus in vivo involves a series of electron and proton transfers. Consideration is given as to how electron fluxes through photosystem I (PSI), using absorption spectroscopy, and through photosystem II (PSII), using chlor...

Full description

Saved in:
Bibliographic Details
Published in:Plant, cell and environment cell and environment, 2007-09, Vol.30 (9), p.1107-1125
Main Authors: BAKER, NEIL R, HARBINSON, JEREMY, KRAMER, DAVID M
Format: Article
Language:English
Subjects:
ATP synthesis
Chlorophyll - metabolism
chlorophyll fluorescence
chloroplast atp synthase
co2 assimilation
cyclic electron flow
cyclic electron flux
cytochrome bf complex
electrochromic shift
Electron Transport
Energy Metabolism - physiology
induced absorbency changes
Light
light‐induced absorbance change
linear electron flux
pea leaves
Photosynthesis - physiology
photosystem I
Photosystem I Protein Complex - metabolism
photosystem II
Photosystem II Protein Complex - metabolism
Plant Leaves - metabolism
proton transport
Protons
quantum yield
redox state
Thylakoids - metabolism
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The light-dependent production of ATP and reductants by the photosynthetic apparatus in vivo involves a series of electron and proton transfers. Consideration is given as to how electron fluxes through photosystem I (PSI), using absorption spectroscopy, and through photosystem II (PSII), using chlorophyll fluorescence analyses, can be estimated in vivo. Measurements of light-induced electrochromic shifts using absorption spectroscopy provide a means of analyzing the proton fluxes across the thylakoid membranes in vivo. Regulation of these electron and proton fluxes is required for the thylakoids to meet the fluctuating metabolic demands of the cell. Chloroplasts exhibit a wide and flexible range of mechanisms to regulate electron and proton fluxes that enable chloroplasts to match light use for ATP and reductant production with the prevailing metabolic requirements. Non-invasive probing of electron fluxes through PSI and PSII, and proton fluxes across the thylakoid membranes can provide insights into the operation of such regulatory processes in vivo.
ISSN:0140-7791
1365-3040
DOI:10.1111/j.1365-3040.2007.01680.x