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  Regulation of shoot branching in Arabidopsis by trehalose 6-phosphate

Fichtner, F., Barbier, F. F., Annunziata, M. G., Feil, R., Olas, J. J., Mueller-Roeber, B., et al. (2021). Regulation of shoot branching in Arabidopsis by trehalose 6-phosphate. New Phytologist, 229(4), 2135-2151. doi:10.1111/nph.17006.

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Genre: Journal Article
Alternative Title : New Phytologist

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 Creators:
Fichtner, F.1, Author              
Barbier, Francois F.2, Author
Annunziata, Maria Grazia1, Author              
Feil, R.1, Author              
Olas, Justyna J.2, Author
Mueller-Roeber, B.3, Author              
Stitt, M.1, Author              
Beveridge, Christine A.2, Author
Lunn, J. E.1, Author              
Affiliations:
1System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              
2external, ou_persistent22              
3Plant Signalling, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753311              

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Free keywords: Arabidopsis thaliana (arabidopsis), axillary bud, branching, sucrose, sugar signalling, trehalose 6-phosphate
 Abstract: Summary -Trehalose 6-phosphate (Tre6P) is a sucrose signalling metabolite that has been implicated in regulation of shoot branching, but its precise role is not understood. -We expressed tagged forms of TREHALOSE-6-PHOSPHATE SYNTHASE1 (TPS1) to determine where Tre6P is synthesized in arabidopsis (Arabidopsis thaliana), and investigated the impact of localized changes in Tre6P levels, in axillary buds or vascular tissues, on shoot branching in wild-type and branching mutant backgrounds. -TPS1 is expressed in axillary buds and the subtending vasculature, as well as in the leaf and stem vasculature. Expression of a heterologous trehalose-6-phosphate phosphatase (TPP) to lower Tre6P in axillary buds strongly delayed bud outgrowth in long days and inhibited branching in short days. TPP expression in the vasculature also delayed lateral bud outgrowth and decreased branching. Increased Tre6P in the vasculature enhanced branching and was accompanied by higher expression of FLOWERING LOCUS T (FT) and up-regulation of sucrose transporters. Increased vascular Tre6P levels enhanced branching in branched1 but not in ft mutant backgrounds. -These results provide direct genetic evidence of a local role for Tre6P in regulation of axillary bud outgrowth within the buds themselves, and also connect Tre6P with systemic regulation of shoot branching via FT.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1111/nph.17006
 Degree: -

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Title: New Phytologist
  Other : New Phytol.
Source Genre: Journal
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Affiliations:
Publ. Info: Wiley; New Phytologist Foundation
Pages: - Volume / Issue: 229 (4) Sequence Number: - Start / End Page: 2135 - 2151 Identifier: ISSN: 0028-646X
CoNE: https://pure.mpg.de/cone/journals/resource/954925334695