Sugar Transporter Protein 1 (STP1) contributes to regulation of the genes involved in shoot branching via carbon partitioning in Arabidopsis

We previously demonstrated that alterations in sugar partitioning affect the expression of genes involved in hormone biosynthesis and responses, including BRANCHED1 (BRC1), resulting in enhanced shoot branching in transgenic Arabidopsis plants overexpressing cyanobacterial fructose-1,6-bisphosphatas...

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Veröffentlicht in:Bioscience, biotechnology, and biochemistry biotechnology, and biochemistry, 2019-03, Vol.83 (3), p.472-481
Hauptverfasser: Otori, Kumi, Tanabe, Noriaki, Tamoi, Masahiro, Shigeoka, Shigeru
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creator Otori, Kumi
Tanabe, Noriaki
Tamoi, Masahiro
Shigeoka, Shigeru
description We previously demonstrated that alterations in sugar partitioning affect the expression of genes involved in hormone biosynthesis and responses, including BRANCHED1 (BRC1), resulting in enhanced shoot branching in transgenic Arabidopsis plants overexpressing cyanobacterial fructose-1,6-bisphosphatase-II in the cytosol (AcF). The exogenous treatment of wild-type Arabidopsis plants with sugars showed the same transcript characteristics, indicating that sugars act as a signal for branching. We also found that the reductions induced in BRC1 expression levels in wild-type plants by the sugar treatments were suppressed in the knockout mutant of sugar transporter 1 (stp1-1). Intracellular sugar contents were similar in stp1-1 and wild-type plants following the sugar treatments, suggesting that STP1 acts as a factor for the regulation of shoot branching depending on extracellular sugar contents. Abbreviations: BRC1: BRABCHED1; FBP/SBPase: fructose-1,6-/sedoheptulose-1,7-bisphosphatase; Glc: glucose; HXK: hexokinase; SnRK1.1/AKIN10: SNF1-RELATED PROTEIN KINASE 1.1; Suc: sucrose; SnRK1: sucrose non-fermenting 1-related protein kinase; STP: sugar transporter protein Sugar Transporter Protein 1 (STP1) contributes to regulation of shoot branching.
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The exogenous treatment of wild-type Arabidopsis plants with sugars showed the same transcript characteristics, indicating that sugars act as a signal for branching. We also found that the reductions induced in BRC1 expression levels in wild-type plants by the sugar treatments were suppressed in the knockout mutant of sugar transporter 1 (stp1-1). Intracellular sugar contents were similar in stp1-1 and wild-type plants following the sugar treatments, suggesting that STP1 acts as a factor for the regulation of shoot branching depending on extracellular sugar contents. 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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; Freely Accessible Japanese Titles; EZB-FREE-00999 freely available EZB journals
subjects Arabidopsis - drug effects
Arabidopsis - genetics
Arabidopsis - growth & development
Arabidopsis - metabolism
Arabidopsis Proteins - metabolism
Carbon - metabolism
Gene Expression Regulation, Plant - drug effects
Monosaccharide Transport Proteins - metabolism
Mutation
Phenotype
Plant Growth Regulators - biosynthesis
Plant Growth Regulators - metabolism
Plant Shoots - drug effects
Plant Shoots - growth & development
RNA, Messenger - genetics
RNA, Messenger - metabolism
Shoot branching
Signal Transduction - drug effects
Signal Transduction - genetics
sugar signaling
sugar transporter
Sugars - metabolism
Sugars - pharmacology
title Sugar Transporter Protein 1 (STP1) contributes to regulation of the genes involved in shoot branching via carbon partitioning in Arabidopsis
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