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Publication details

Document type
Journal articles

Document subtype
Full paper

Title
Regulation of growth by the trehalose pathway: relationship to temperature and sucrose

Participants in the publication
Nunes C (Author)
Schluepmann H (Author)
Delatte TL (Author)
Wingler A (Author)
Silva AB (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
 Dep. Biologia Vegetal
 BioISI
  Fevereiro PS (Author)
Jansen M (Author)
Fiorani F (Author)
Wiese-Klinkenberg A (Author)
Paul M (Author)

Summary
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 bio- synthetic 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 toler- ance. 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.

Date of Publication
2013

Where published
PLANT SIGNALING AND BEHAVIOR

Publication Identifiers
ISSN - 1559-2316

Volume
8
Number
12

Starting page
e26626

Document Identifiers
DOI - https://doi.org/10.4161/psb.26626

Rankings
SCIMAGO Q1 (2013) - 4.213 - Plant Sciences

Keywords
Arabidopsis thaliana trehalose 6-phosphate sucrose SnRK1 growth cold Fv/Fm high-throughput screening

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APA
Nunes C, Schluepmann H, Delatte TL, Wingler A, Silva AB,  Fevereiro PS, Jansen M, Fiorani F, Wiese-Klinkenberg A, Paul M, (2013). Regulation of growth by the trehalose pathway: relationship to temperature and sucrose. PLANT SIGNALING AND BEHAVIOR, 8, ISSN 1559-2316. eISSN .

IEEE
Nunes C, Schluepmann H, Delatte TL, Wingler A, Silva AB,  Fevereiro PS, Jansen M, Fiorani F, Wiese-Klinkenberg A, Paul M, "Regulation of growth by the trehalose pathway: relationship to temperature and sucrose" in PLANT SIGNALING AND BEHAVIOR, vol. 8, 2013. 10.4161/psb.26626

BIBTEX
@article{1305, author = {Nunes C and Schluepmann H and Delatte TL and Wingler A and Silva AB and  Fevereiro PS and Jansen M and Fiorani F and Wiese-Klinkenberg A and Paul M}, title = {Regulation of growth by the trehalose pathway: relationship to temperature and sucrose}, journal = {PLANT SIGNALING AND BEHAVIOR}, year = 2013, volume = 8 }