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@ARTICLE{PEUKE:172101,
author = {PEUKE, ANDREAS D. and GESSLER, ARTHUR and TRUMBORE, SUSAN
and Windt, Carel and HOMAN, NATALIA and GERKEMA, EDO and VAN
AS, HENK},
title = {{P}hloem flow and sugar transport in {R}icinus communis
{L}. is inhibited under anoxic conditions of shoot or roots},
journal = {Plant, cell $\&$ environment},
volume = {38},
number = {3},
issn = {0140-7791},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2014-05644},
pages = {433–447},
year = {2015},
abstract = {Anoxic conditions should hamper the transport of sugar in
the phloem, as this is an active process. The canopy is a
carbohydrate source and the roots are carbohydrate sinks. By
fumigating the shoot with N2 or flooding the rhizosphere,
anoxic conditions in the source or sink, respectively, were
induced. Volume flow, velocity, conducting area and
stationary water of the phloem were assessed by non-invasive
magnetic resonance imaging (MRI) flowmetry. Carbohydrates
and δ13C in leaves, roots and phloem saps were
determined.Following flooding, volume flow and conducting
area of the phloem declined and sugar concentrations in
leaves and in phloem saps slightly increased.
Oligosaccharides appeared in phloem saps and after 3 d,
carbon transport was reduced to $77\%.$ Additionally, the
xylem flow declined and showed finally no daily rhythm.
Anoxia of the shoot resulted within minutes in a reduction
of volume flow, conductive area and sucrose in the phloem
sap decreased. Sugar transport dropped to below $40\%$ by
the end of the N2 treatment. However, volume flow and phloem
sap sugar tended to recover during the N2 treatment.Both
anoxia treatments hampered sugar transport. The flow
velocity remained about constant, although phloem sap sugar
concentration changed during treatments. Apparently, stored
starch was remobilized under anoxia.},
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:000349994600006},
pubmed = {pmid:24995994},
doi = {10.1111/pce.12399},
url = {https://juser.fz-juelich.de/record/172101},
}