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@ARTICLE{Nagel:202475,
author = {Nagel, Kerstin and Bonnett, David and Furbank, Robert and
Walter, A. and Schurr, U. and Watt, M.},
title = {{S}imultaneous effects of leaf irradiance and soil moisture
on growth and root system architecture of novel wheat
genotypes: implications for phenotyping},
journal = {The journal of experimental botany},
volume = {66},
number = {18},
issn = {0022-0957},
address = {Oxford},
publisher = {Univ. Press},
reportid = {FZJ-2015-04684},
pages = {5441-5452},
year = {2015},
abstract = {Plants in the field are exposed to varying light and
moisture. Agronomic improvement requires knowledge of
whole-plant phenotypes expressed in response to simultaneous
variation in these essential resources. Most phenotypes,
however, have been described from experiments where
resources are varied singularly. To test the importance of
varying shoot and root resources for phenotyping studies,
sister pre-breeding lines of wheat were phenotyped in
response to independent or simultaneous exposure to two
light levels and soil moisture profiles. The distribution
and architecture of the root systems depended strongly on
the moisture of the deeper soil layer. For one genotype,
roots, specifically lateral roots, were stimulated to grow
into moist soil when the upper zone was well-watered and
were inhibited by drier deep zones. In contrast, the other
genotype showed much less plasticity and responsiveness to
upper moist soil, but maintained deeper penetration of roots
into the dry layer. The sum of shoot and root responses was
greater when treated simultaneously to low light and low
soil water, compared to each treatment alone, suggesting the
value of whole plant phenotyping in response to multiple
conditions for agronomic improvement. The results suggest
that canopy management for increased irradiation of leaves
would encourage root growth into deeper drier soil, and that
genetic variation within closely related breeding lines may
exist to favour surface root growth in response to
irrigation or in-season rainfall.},
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},
UT = {WOS:000361208000006},
pubmed = {pmid:26089535},
doi = {10.1093/jxb/erv290},
url = {https://juser.fz-juelich.de/record/202475},
}