PMID: 9418043Jan 7, 1998Paper

An Arabidopsis mutant showing reduced feedback inhibition of photosynthesis

The Plant Journal : for Cell and Molecular Biology
J J Van OostenS C Smeekens

Abstract

Many plant genes are responsive to sugars but the mechanisms used by plants to sense sugars are unknown. A genetic approach has been used in Arabidopsis to identify genes involved in perception and transduction of sugar signals. For this purpose, an in vivo reporter system was established consisting of the light- and sugar-regulated plastocyanin promoter, fused to the luciferase coding sequence (PC-LUC construct). At the seedling stage, expression of the PC-LUC gene is repressed by sucrose, and a number of sucrose-uncoupled (sun) mutants were selected in which sucrose is unable to repress the activity of the PC promoter. Three mutants have been characterized in more detail. The sugar analog 2-deoxy-D-glucose (2DG) was used to repress whole plant photosynthesis, PC-LUC gene expression and total ribulose-1,5-bisphosphate activity. It was found that the sun6 mutation makes plants unresponsive to these 2DG-induced effects. Moreover, unlike wild-type plants, sun6 mutants are insensitive to elevated levels of glucose in the growth medium. These findings suggest that the SUN6 gene is active in a hexose-activated signal transduction pathway.

Citations

Mar 6, 1999·Current Opinion in Plant Biology·S Smeekens
Sep 6, 2000·The Plant Journal : for Cell and Molecular Biology·R J LabyS I Gibson
Mar 9, 1999·Plant Physiology·J V PegoS C Smeekens
Sep 11, 1999·Plant Physiology·J C Stein, G Hansen
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Sjef Smeekens
Aug 26, 1998·Proceedings of the National Academy of Sciences of the United States of America·L ZhouJ Sheen
Apr 29, 1999·Proceedings of the National Academy of Sciences of the United States of America·S I Gibson, I A Graham
Nov 28, 2012·Trends in Plant Science·Julia J WindSjef C Smeekens
Aug 16, 2005·The Plant Journal : for Cell and Molecular Biology·Gustavo Javier Acevedo-HernándezLuis Rafael Herrera-Estrella
Nov 4, 2006·Plant, Cell & Environment·Fred RookMichael W Bevan
Mar 31, 2011·Plant Signaling & Behavior·Doron Shkolnik-Inbar, Dudy Bar-Zvi
Aug 12, 2000·Journal of Experimental Botany·J V PegoS C Smeekens
Apr 9, 2017·The Plant Journal : for Cell and Molecular Biology·Gilor KellyDavid Granot
Jul 23, 2018·Journal of Experimental Botany·Christer JanssonTodd Mockler

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