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@ARTICLE{Nunes:137612,
author = {Nunes, C. and Schluepmann, H. and Delatte, T. L. and
Wingler, A. and Silva, A. B. and Feveiro, P. S. and Jansen,
Marcus and Fiorani, Fabio and Wiese-Klinkenberg, Anika and
Paul, M. J.},
title = {{R}egulation of growth by the trehalose pathway:
{R}elationship to temperature and sucrose},
journal = {Plant signaling $\&$ behavior},
volume = {8},
number = {12},
issn = {1559-2316},
address = {Austin, Tex.},
publisher = {Landes Bioscience},
reportid = {FZJ-2013-03992},
pages = {e26626},
year = {2013},
abstract = {Carbon signaling can override carbon supply in the
regulation of growth. At least some of this regulation is
imparted by the sugar signal trehalose 6-phosphate (T6P)
through the protein kinase, SnRK1. This signaling pathway
regulates biosynthetic processes involved in growth under
optimal growing conditions. Recently, using a seedling
system we showed that under sub-optimal conditions, such as
cold, carbon signaling by T6P/ SnRK1 enables recovery of
growth following relief of the stress. The T6P/ SnRK1
mechanism thus could be selected as a means of improving low
temperature tolerance. High-throughput automated Fv/Fm
measurements provide a potential means to screen for T6P/
SnRK1, and here we confirm through measurements of Fv/Fm in
rosettes that T6P promotes low temperature tolerance and
recovery during cold to warm transfer. Further, to better
understand the coordination between sugars, trehalose
pathway, and temperature-dependent growth, we examine the
interrelationship between sugars, trehalose phosphate
synthase (TPS), and trehalose phosphate phosphatase (TPP)
gene expression and T6P content in seedlings. Sucrose,
particularly when fed exogenously, correlated well with TPS1
and TPPB gene expression, suggesting that these enzymes are
involved in maintaining carbon flux through the pathway in
relation to sucrose supply. However, when sucrose
accumulated to higher levels under low temperature and low
N, TPS1 and TPPB expression were less directly related to
sucrose; other factors may also contribute to regulation of
TPS1 and TPPB expression under these conditions. TPPA
expression was not related to sucrose content and all genes
were not well correlated with endogenous glucose. Our work
has implications for understanding acclimation to
sink-limited growth conditions such as low temperature and
for screening cold-tolerant genotypes with altered T6P/
SnRK1 signaling.},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {242 - Sustainable Bioproduction (POF2-242)},
pid = {G:(DE-HGF)POF2-242},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:24084646},
doi = {10.4161/psb.26626},
url = {https://juser.fz-juelich.de/record/137612},
}