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@ARTICLE{Radchuk:1010536,
author = {Radchuk, Volodymyr and Belew, Zeinu M and Gündel, Andre
and Mayer, Simon and Hilo, Alexander and Hensel, Goetz and
Sharma, Rajiv and Neumann, Kerstin and Ortleb, Stefan and
Wagner, Steffen and Muszynska, Aleksandra and Crocoll,
Christoph and Xu, Deyang and Hoffie, Iris and Kumlehn,
Jochen and Fuchs, Joerg and Peleke, Fritz F and Szymanski,
Jedrzej J and Rolletschek, Hardy and Nour-Eldin, Hussam H
and Borisjuk, Ljudmilla},
title = {{SWEET}11b transports both sugar and cytokinin in
developing barley grains},
journal = {The plant cell},
volume = {35},
number = {6},
issn = {1040-4651},
address = {Rockville, Md.},
publisher = {Soc.},
reportid = {FZJ-2023-03111},
pages = {2186 - 2207},
year = {2023},
abstract = {Even though Sugars Will Eventually be Exported Transporters
(SWEETs) have been found in every sequenced plant genome, a
comprehensive understanding of their functionality is
lacking. In this study, we focused on the SWEET family of
barley (Hordeum vulgare). A radiotracer assay revealed that
expressing HvSWEET11b in African clawed frog (Xenopus
laevis) oocytes facilitated the bidirectional transfer of
not only just sucrose and glucose, but also cytokinin.
Barley plants harboring a loss-of-function mutation of
HvSWEET11b could not set viable grains, while the
distribution of sucrose and cytokinin was altered in
developing grains of plants in which the gene was knocked
down. Sucrose allocation within transgenic grains was
disrupted, which is consistent with the changes to the
cytokinin gradient across grains, as visualized by magnetic
resonance imaging and Fourier transform infrared
spectroscopy microimaging. Decreasing HvSWEET11b expression
in developing grains reduced overall grain size, sink
strength, the number of endopolyploid endosperm cells, and
the contents of starch and protein. The control exerted by
HvSWEET11b over sugars and cytokinins likely predetermines
their synergy, resulting in adjustments to the grain's
biochemistry and transcriptome.},
cin = {IBG-4},
ddc = {540},
cid = {I:(DE-Juel1)IBG-4-20200403},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217)},
pid = {G:(DE-HGF)POF4-2171},
typ = {PUB:(DE-HGF)16},
pubmed = {36857316},
UT = {WOS:000946526400001},
doi = {10.1093/plcell/koad055},
url = {https://juser.fz-juelich.de/record/1010536},
}