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@ARTICLE{Schneider:845671,
author = {Schneider, Hannah and Wojciechowski, Tobias and Postma,
Johannes Auke and Brown, Kathleen M and Lynch, Jonathan P},
title = {{E}thylene modulates root cortical senescence in barley},
journal = {Annals of botany},
volume = {122},
number = {1},
issn = {1095-8290},
address = {Oxford},
publisher = {Oxford University Press},
reportid = {FZJ-2018-02883},
pages = {95 - 105},
year = {2018},
abstract = {Background and AimsRoot cortical senescence (RCS) is a
poorly understood phenomenon with implications for
adaptation to edaphic stress. It was hypothesized that RCS
in barley (Hordeum vulgare L.) is (1) accelerated by
exogenous ethylene exposure; (2) accompanied by differential
expression of ethylene synthesis and signalling genes; and
(3) associated with differential expression of programmed
cell death (PCD) genes.MethodsGene expression of root
segments from four barley genotypes with and without RCS was
evaluated using quantitative real-time PCR (qRT-PCR). The
progression of RCS was manipulated with root zone ethylene
and ethylene inhibitor applications.Key ResultsThe results
demonstrate that ethylene modulates RCS. Four genes related
to ethylene synthesis and signalling were upregulated during
RCS in optimal, low nitrogen and low phosphorus nutrient
regimes. RCS was accelerated by root zone ethylene
treatment, and this effect was reversed by an ethylene
action inhibitor. Roots treated with exogenous ethylene had
35 and 46 $\%$ more cortical senescence compared with the
control aeration treatment in seminal and nodal roots,
respectively. RCS was correlated with expression of two
genes related to programmed cell death (PCD).ConclusionsThe
development of RCS is similar to root cortical aerenchyma
formation with respect to ethylene modulation of the PCD
process.},
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 = {pmid:29897390},
UT = {WOS:000438280300010},
doi = {10.1093/aob/mcy059},
url = {https://juser.fz-juelich.de/record/845671},
}