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@ARTICLE{vanDusschoten:888602,
author = {van Dusschoten, Dagmar and Kochs, Johannes and Kuppe,
Christian W. and Sydoruk, Viktor A. and Couvreur, Valentin
and Pflugfelder, Daniel and Postma, Johannes A.},
title = {{S}patially {R}esolved {R}oot {W}ater {U}ptake
{D}etermination {U}sing a {P}recise {S}oil {W}ater {S}ensor},
journal = {Plant physiology},
volume = {184},
number = {3},
issn = {1532-2548},
address = {Rockville, Md.},
publisher = {Soc.},
reportid = {FZJ-2020-05058},
pages = {1221 - 1235},
year = {2020},
abstract = {To answer long-standing questions about how plants use and
regulate water, an affordable, noninvasive way to determine
localroot water uptake (RWU) is required. Here, we present a
sensor, the soil water profiler (SWaP), which can determine
local soilwater content (u) with a precision of 6.10 25 cm 3
$ cm 23 , an accuracy of 0.002 cm 3 $ cm 23 , a temporal
resolution of 24 min, and aone-dimensional spatial
resolution of 1 cm. The sensor comprises two copper sheets,
integrated into a sleeve and connected to acoil, which form
a resonant circuit. A vector network analyzer, inductively
coupled to the resonant circuit, measures theresonance
frequency, against which u was calibrated. The sensors were
integrated into a positioning system, which measuresu along
the depth of cylindrical tubes. When combined with
modulating light (4-h period) and resultant modulating
planttranspiration, the SWaP enables quantification of the
component of RWU distribution that varies proportionally
with total plantwater uptake, and distinguishes it from soil
water redistribution via soil pores and roots. Additionally,
as a young, growingmaize (Zea mays) plant progressively
tapped its soil environment dry, we observed clear changes
in plant-driven RWU and soilwater redistribution profiles.
Our SWaP setup can measure the RWU and redistribution of
sandy-soil water content withunprecedented precision. The
SWaP is therefore a promising device offering new insights
into soil–plant hydrology, withapplications for functional
root phenotyping in nonsaline, temperature-controlled
conditions, at low cost.},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {582 - Plant Science (POF3-582)},
pid = {G:(DE-HGF)POF3-582},
typ = {PUB:(DE-HGF)16},
pubmed = {32887733},
UT = {WOS:000585840800006},
doi = {10.1104/pp.20.00488},
url = {https://juser.fz-juelich.de/record/888602},
}