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@ARTICLE{Albrecht:872861,
author = {Albrecht, Hendrik and Fiorani, Fabio and Pieruschka, Roland
and Müller-Linow, Mark and Jedmowski, Christoph and
Schreiber, Lukas and Schurr, Ulrich and Rascher, Uwe},
title = {{Q}uantitative {E}stimation of {L}eaf {H}eat {T}ransfer
{C}oefficients by {A}ctive {T}hermography at {V}arying
{B}oundary {L}ayer {C}onditions},
journal = {Frontiers in plant science},
volume = {10},
issn = {1664-462X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2020-00327},
pages = {1684},
year = {2020},
abstract = {Quantifying heat and mass exchanges processes of plant
leaves is crucial for detailed under-standing of dynamic
plant-environment interactions. The two main components of
these pro-cesses, convective heat transfer and
transpiration, are inevitably coupled as both processes are
restricted by the leaf boundary layer. To measure leaf heat
capacity and leaf heat transfer co-efficient, we thoroughly
tested and applied an active thermography method that uses a
transi-ent heat pulse to compute τ, the time constant of
leaf cooling after release of the pulse. We validated our
approach in the laboratory on intact leaves of spring barley
(Hordeum vulgare) and common bean (Phaseolus vulgaris), and
measured τ-changes at different boundary layer
conditions.By modelling the leaf heat transfer coefficient
with dimensionless numbers, we could demon-strate that τ
improves our ability to close the energy budget of plant
leaves and that modelling of transpiration requires
considerations of convection. Applying our approach to
thermal im-ages we obtained spatio-temporal maps of τ,
providing observations of local differences in thermal
responsiveness of leaf surfaces.We propose that active
thermography is an informative methodology to measure leaf
heat transfer and derive spatial maps of thermal
responsiveness of leaves contributing to improve models of
leaf heat transfer processes.},
cin = {IBG-2},
ddc = {570},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {582 - Plant Science (POF3-582) / DPPN - Deutsches Pflanzen
Phänotypisierungsnetzwerk (BMBF-031A053A)},
pid = {G:(DE-HGF)POF3-582 / G:(DE-Juel1)BMBF-031A053A},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32038673},
UT = {WOS:000511191400001},
doi = {10.3389/fpls.2019.01684},
url = {https://juser.fz-juelich.de/record/872861},
}