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@PHDTHESIS{Correa:1002264,
author = {Correa, Jose},
title = {{R}ole of root plasticity in response to soil compaction in
sorghum},
school = {Bonn},
type = {Dissertation},
address = {Bonn},
publisher = {Rheinische Friedrich-Wilhelms-Universität Bonn},
reportid = {FZJ-2023-01246},
pages = {146},
year = {2022},
note = {Dissertation, Bonn, 2021},
abstract = {Compacted soils limit crop production and affect millions
of hectares of agricultural land globally. Plants vary in
tolerance to soil compaction and roots express various
plastic responses. Unfortunately, the importance of those
responses for crop yield and the implication in breeding are
practically unknown. Accordingly, to test whether the
plasticity of the root system architecture is associated
with the tolerance to soil compaction, we reviewed the
various root responses reported in the literature and
describe the consequences of soil compaction on the rooting
environment. Additionally, we carried out a set of
experiments to study the phenotypic diversity of shoot and
root plasticity in a collection of sorghum genotypes. For
that, plants were grown in a greenhouse for three to six
weeks in homo- and heterogeneous soil density gradients
(from 1.3 to 1.8 g cm-3). Finally, a simulation-based
research was conducted to study the plants functional
consequence of phenotypic response to soil compaction. As a
conclusion, sorghum genotypes can vary significantly in
terms of their response to soil compaction. Tolerant lines
are in general smaller sized genotypes which exhibit
plasticity to soil compaction for fine roots only.
Additionally, this tolerance is associated with the ability
to compensate the limited function of an impeded portion of
their root system, by growing less roots in those layers
where the strength is high and growing more roots in looser
zones. Although these responses are complex, root plasticity
can be targeted in breeding to increase the crop yield under
specific conditions such as low-input agronomic systems.},
cin = {IBG-2},
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)11},
urn = {https://nbn-resolving.org/urn:nbn:de:hbz:5-66718},
url = {https://juser.fz-juelich.de/record/1002264},
}