Rapid light curves: A powerful tool to assess photosynthetic activity

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dc.contributor.author Ralph, PJ
dc.contributor.author Gademann, R
dc.date.accessioned 2009-12-21T02:29:55Z
dc.date.issued 2005-07
dc.identifier.citation Aquatic Botany, 2005, 82 (3), pp. 222 - 237
dc.identifier.issn 0304-3770
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/3706
dc.description.abstract Rapid light curves provide detailed information on the saturation characteristics of electron transport, as well as the overall photosynthetic performance of a plant. Rapid light curves were collected from samples of Zostera marina grown under low and high-light conditions (50 and 300 μmol photons m-2 s-1) and the distinctive patterns of RLC parameters are discussed, in terms of differential sink capacity and PSII reaction centre closure. Derived cardinal points of a rapid light curve (α, Ek and rETRmax) describe the photosynthetic capacity of a seagrass leaf, its light adaptation state and its capacity to tolerate short-term changes in light. The shapes of the corresponding F and F′m curves also provide information on the development of the trans-thylakoid proton gradient and thermal energy dissipation. Low-light leaves showed limited photosynthetic capacity and reduced activity of non-photochemical quenching pathways, whereas photosynthesis of high light leaves were not limited and showed an elevated level of non-photochemical quenching, possibly associated with xanthophyll cycle activity. Light-dark kinetics are also discussed in relation to relaxation of non-photochemical quenching and its various components. A curve fitting model is recommended based on the double exponential decay function. In this paper, we explain the fundamental aspects of a RLC, describe how it reflects the response to light exposure of a leaf, how to interpret these curves, and how to quantitatively describe and compare RLCs. © 2005 Elsevier B.V. All rights reserved.
dc.language eng
dc.relation.isbasedon 10.1016/j.aquabot.2005.02.006
dc.title Rapid light curves: A powerful tool to assess photosynthetic activity
dc.type Journal Article
dc.parent Aquatic Botany
dc.journal.volume 3
dc.journal.volume 82
dc.journal.number 3 en_US
dc.publocation Amsterdam, Netherlands en_US
dc.identifier.startpage 222 en_US
dc.identifier.endpage 237 en_US
dc.cauo.name DVCRch.Institute for Water & Environmental Resource Mgmnt en_US
dc.conference Verified OK en_US
dc.for 060701 Phycology (Incl. Marine Grasses)
dc.personcode 890085
dc.percentage 100 en_US
dc.classification.name Phycology (incl. Marine Grasses) en_US
dc.classification.type FOR-08 en_US
dc.custom 1.143 en_US
dc.description.keywords Chlorophyll a fluorescence
dc.description.keywords PAM
dc.description.keywords Quenching analysis
dc.description.keywords RLC
dc.description.keywords Seagrass
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history Closed (ID: 3)

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