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Photosystem II fluorescence: Slow changes – Scaling from the past ☆

Paper ID Volume ID Publish Year Pages File Format Full-Text
29631 44425 2011 13 PDF Available
Title
Photosystem II fluorescence: Slow changes – Scaling from the past ☆
Abstract

With the advent of photoelectric devices (photocells, photomultipliers) in the 1930s, fluorometry of chlorophyll (Chl) a in vivo emerged as a major method in the science of photosynthesis. Early researchers employed fluorometry primarily for two tasks: to elucidate the role in photosynthesis, if any, of other plant pigments, such as Chl b, Chl c, carotenoids and phycobilins; and to use it as a convenient inverse measure of photosynthetic activity. In pursuing the latter task, it became apparent that Chl a fluorescence emission is influenced (i) by redox active Chl a molecules in the reaction center of photosystem (PS) II (photochemical quenching); (ii) by an electrochemical imbalance across the thylakoid membrane (high energy quenching); and (iii) by the size of the peripheral antennae of weakly fluorescent PSI and strongly fluorescent PSII in response to changes in the ambient light (state transitions).In this perspective we trace the historical evolution of our awareness of these concepts, particularly of the so-called ‘State Transitions’.

► Evolution of concepts for chlorophyll a fluorescence since photoelectric methods. ► History of the discovery of ‘state changes’ in photosynthesis. ► Direct/indirect relation of chlorophyll a fluorescence to electron transport. ► Chlorophyll a fluorescence monitors energy distribution to the two photosystems. ► Quenching/non-quenching processes as modifiers of chlorophyll a fluorescence in vivo.

Keywords
Chlorophyll; Fluorescence induction; Non-photochemical quenching; Photochemical quenching; State transitions; Regulation of excitation energy distribution
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Photosystem II fluorescence: Slow changes – Scaling from the past ☆
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 104, Issues 1–2, July–August 2011, Pages 258–270
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us