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@ARTICLE{Correa:904865,
author = {Correa, Jose and Postma, Johannes A. and Wojciechowski,
Tobias},
title = {{P}henotypic response to soil compaction varies among
genotypes and correlates with plant size in sorghum},
journal = {Plant and soil},
volume = {472},
issn = {0032-079X},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2022-00182},
pages = {59 - 72},
year = {2022},
abstract = {AbstractAimsSoil compaction is a major yield-reducing
factor worldwide and imposes physico-chemical constraints to
plant growth and development. Facing limitations, roots can
adapt and compensate for loss of functioning through their
plasticity. Being primarily a belowground challenge,
tolerance to soil compaction needs to be associated with
root phenotype and plasticity. It is therefore of importance
to distinguish between size-related apparent and
size-independent adaptive plasticity. We determined the
above- and belowground plasticity of sorghum genotypes
varying in overall plant size.MethodsWe quantified
plasticity as the degree response (adaptive and apparent
plasticity) to soil compaction and conducted two experiments
with sorghum and two soil density levels (1.4 and 1.8 Mg
m−3). First, we quantified the shoot biomass plasticity of
28 sorghum genotypes. Second, we studied the root plasticity
of six genotypes varying in shoot size and tolerance to soil
compaction.ResultsPlasticity was correlated with plant
biomass with larger genotypes responding earlier and more
intensely. Soil compaction affected roots more than shoots
and plasticity was expressed foremost in nodal root number
and fine root length. Impeded plants produced 35 and $47\%$
less root mass and length,
respectively.ConclusionsPlasticity to soil compaction varies
among genotypes, but less-sensitive lines are in general
smaller-sized genotypes. The association between tolerance
and plant biomass may pose challenges to crop production;
however, vigorous genotypes with unresponsive shoots to soil
compaction do exist. Maintaining shoot growth relatively
stable while the root modifies its structure can be an
important adaptation mechanism to soil compaction.},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217)},
pid = {G:(DE-HGF)POF4-2171},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000738433000001},
doi = {10.1007/s11104-021-05160-z},
url = {https://juser.fz-juelich.de/record/904865},
}