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@ARTICLE{Walter:44106,
author = {Walter, A. and Christ, M. M. and Barron-Gafford, G. A. and
Grieve, K. A. and Paige, T. and Murthy, R. and Rascher, U.},
title = {{T}he effect of elevated {CO}2 on diel leaf growth cycle,
leaf carbohydrate content and canopy growth performance of
{P}opulus deltoides},
journal = {Global change biology},
volume = {11},
issn = {1354-1013},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-44106},
pages = {1207 - 1219},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {Image sequence processing methods were applied to study the
effect of elevated CO2 on the diel leaf growth cycle for the
first time in a dicot plant. Growing leaves of Populus
deltoides, in stands maintained under ambient and elevated
CO2 for up to 4 years, showed a high degree of heterogeneity
and pronounced diel variations of their relative growth rate
(RGR) with maxima at dusk. At the beginning of the season,
leaf growth did not differ between treatments. At the end of
the season, final individual leaf area and total leaf
biomass of the canopy was increased in elevated CO2.
Increased final leaf area at elevated CO2 was achieved via a
prolonged phase of leaf expansion activity and not via
larger leaf size upon emergence. The fraction of leaves
growing at $30–40\% day−1$ was increased by a factor
of two in the elevated CO2 treatment. A transient minimum of
leaf expansion developed during the late afternoon in leaves
grown under elevated CO2 as the growing season progressed.
During this minimum, leaves grown under elevated CO2
decreased their RGR to $50\%$ of the ambient value. The
transient growth minimum in the afternoon was correlated
with a transient depletion of glucose (less than $50\%)$ in
the growing leaf in elevated CO2, suggesting diversion of
glucose to starch or other carbohydrates, making this
substrate temporarily unavailable for growth. Increased leaf
growth was observed at the end of the night in elevated CO2.
Net CO2 exchange and starch concentration of growing leaves
was higher in elevated CO2. The extent to which the
transient reduction in diel leaf growth might dampen the
overall growth response of these trees to elevated CO2 is
discussed.},
cin = {ICG-III},
ddc = {570},
cid = {I:(DE-Juel1)VDB49},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Biodiversity Conservation / Ecology / Environmental
Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000230726600002},
doi = {10.1111/j.1365-2486.2005.00990.x},
url = {https://juser.fz-juelich.de/record/44106},
}