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@ARTICLE{Nichol:19650,
author = {Nichol, C.J. and Pieruschka, R. and Takayama, K. and
Förser, B. and Kolber, Z. and Rascher, U. and Grace, J. and
Robinson, S.A. and Pogson, B. and Osmond, B.},
title = {{C}anopy conundrums: building on the {B}iosphere 2
experience to scale measurements of inner and outer canopy
photoprotection from the leaf to the landscape},
journal = {Functional plant biology},
volume = {39},
issn = {1445-4408},
address = {Collingwood, Victoria},
publisher = {CSIRO Publ.},
reportid = {PreJuSER-19650},
pages = {1 - 24},
year = {2012},
note = {The unique opportunity to advance experimental ecosystem
and climate change research in B2 L owed most to support
from Edward P Bass (the owner of Biosphere 2), to visionary
leadership from Michael Crow (then Executive Vice-Provost
and Director of the Earth Institute, Columbia University)
and to the huge 'can do' effort from many skilled
technicians, engineers and researchers. We are grateful to
Tony Kendle, Foundation Director of the Eden Project, for
access to that facility and to Donald Murray (Curator) and
Dina Gallick (Team Leader) of the Tropical Biome for
assistance with location of specimens and support with
sampling protocols. Field measurements in avocado orchards
were facilitated by the management of the 'The House without
Steps' (Alstonville NSW) and by John Leonardi (Avocados
Australia). Joe Berry (Carnegie Institution for Science,
Department of Global Ecology, Stanford) and Uli Schurr
(Forschungszentrum Julich) have continued to explore
applications of LIFT (Mk2). At ANU, Caroline Nichol held an
International Outgoing Travel Grant from the Royal Society
of London and her PRI Hyperion work was funded by a UK
Natural Environment Research Council (NERC) standard grant
NE/F017294/1. Roland Pieruschka was supported by a Marie
Curie Outgoing Fellowship (041060-LIFT). Pigment analyses
were supported by Australian Research Council grants
(DP0666289 to CBO and CE056195 to BJP), a start up grant
from the University of Wollongong and we thank Peter
Anderson, University of Edinburgh for his assistance.
Helpful discussions with and advice from, Shizue Matsubara
and Hendrik Poorter, Forschungszentrum Julich were much
appreciated. Some themes in this review were presented by
Barry Osmond in the J.G. Wood lecture to the combined
meeting of the Australian Society of Plant Scientists and
New Zealand Society of Plant Physiologists, Christchurch,
December 2009.},
abstract = {Recognising that plant leaves are the fundamental
productive units of terrestrial vegetation and the
complexity of different environments in which they must
function, this review considers a few of the ways in which
these functions may be measured and potentially scaled to
the canopy. Although canopy photosynthetic productivity is
clearly the sum of all leaves in the canopy, we focus on the
quest for 'economical insights' from measurements that might
facilitate integration of leaf photosynthetic activities
into canopy performance, to better inform modelling based on
the 'insights of economics'. It is focussed on the
reversible downregulation of photosynthetic efficiency in
response to light environment and stress and summarises
various xanthophyll-independent and dependent forms of
photoprotection within the inner and outer canopy of woody
plants. Two main themes are developed. First, we review
experiments showing the retention of leaves that grow old in
the shade may involve more than the 'payback times' required
to recover the costs of their construction and maintenance.
In some cases at least, retention of these leaves may
reflect selection for distinctive properties that contribute
to canopy photosynthesis through utilisation of sun flecks
or provide 'back up' capacity following damage to the outer
canopy. Second, we report experiments offering hope that
remote sensing of photosynthetic properties in the outer
canopy (using chlorophyll fluorescence and spectral
reflectance technologies) may overcome problems of access
and provide integrated measurements of these properties in
the canopy as a whole. Finding appropriate tools to scale
photosynthesis from the leaf to the landscape still presents
a challenge but this synthesis identifies some measurements
and criteria in the laboratory and the field that improve
our understanding of inner and outer canopy processes.},
keywords = {J (WoSType)},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000299052100001},
doi = {10.1071/FP11255},
url = {https://juser.fz-juelich.de/record/19650},
}