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@ARTICLE{Schneider:828343,
author = {Schneider, Hannah and Wojciechowski, Tobias and Postma,
Johannes Auke and Brown, Kathleen M. and Lücke, Andreas and
Zeisler, Viktoria and Schreiber, Lukas and Lynch, Jonathan
P.},
title = {{R}oot cortical senescence decreases root respiration,
nutrient content, and radial water and nutrient transport in
barley},
journal = {Plant, cell $\&$ environment},
volume = {40},
number = {8},
issn = {0140-7791},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2017-02307},
pages = {1392–1408},
year = {2017},
abstract = {The functional implications of root cortical senescence
(RCS) are poorly understood. We tested the hypotheses that
RCS in barley (1) reduces the respiration and nutrient
content of root tissue; (2) decreases radial water and
nutrient transport; and (3) is accompanied by increased
suberization to protect the stele. Genetic variation for RCS
exists between modern germplasm and landraces. Nitrogen and
phosphorus deficiency increased the rate of RCS. Maximal
RCS, defined as the disappearance of the entire root cortex,
reduced root nitrogen content by $66\%,$ phosphorus content
by $63\%$ and respiration by $87\%$ compared with root
segments with no RCS. Roots with maximal RCS had 90, 92 and
$84\%$ less radial water, nitrate and phosphorus transport,
respectively, compared with segments with no RCS. The onset
of RCS coincided with $30\%$ greater aliphatic suberin in
the endodermis. These results support the hypothesis that
RCS reduces root carbon and nutrient costs and may therefore
have adaptive significance for soil resource acquisition. By
reducing root respiration and nutrient content, RCS could
permit greater root growth, soil resource acquisition and
resource allocation to other plant processes. RCS merits
investigation as a trait for improving the performance of
barley, wheat, triticale and rye under edaphic stress.},
cin = {IBG-2},
ddc = {570},
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:000405275300013},
pubmed = {pmid:28164319},
doi = {10.1111/pce.12933},
url = {https://juser.fz-juelich.de/record/828343},
}