Sugar regulation of SUGAR TRANSPORTER PROTEIN 1 (STP1) expression in Arabidopsis thaliana.
In: Journal of Experimental Botany, Jg. 65 (2014-10-01), Heft 18, S. 147-159
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Zugriff:
Sugars regulate the expression of many genes at the transcriptional level. In Arabidopsis thaliana, sugars induce or repress the expression of >1800 genes, including the STP1 (SUGAR TRANSPORTER PROTEIN 1) gene, which encodes an H+/monosaccharide cotransporter. STP1 transcript levels decrease more rapidly after the addition of low concentrations of sugars than the levels of other repressed genes, such as DIN6 (DARK-INDUCED 6). We found that this regulation is exerted at the transcriptional level and is initiated by phosphorylatable sugars. Interestingly, the sugar signal that modulates STP1 expression is transmitted through a HEXOKINASE 1-independent signalling pathway. Finally, analysis of the STP1 5′ regulatory region allowed us to delimit a region of 309 bp that contains the cis elements implicated in the glucose regulation of STP1 expression. Putative cis-acting elements involved in this response were identified. [ABSTRACT FROM AUTHOR]
Titel: |
Sugar regulation of SUGAR TRANSPORTER PROTEIN 1 (STP1) expression in Arabidopsis thaliana.
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Autor/in / Beteiligte Person: | Cordoba, Elizabeth ; Aceves-Zamudio, Denise Lizeth ; Hernández-Bernal, Alma Fabiola ; Ramos-Vega, Maricela ; León, Patricia |
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Zeitschrift: | Journal of Experimental Botany, Jg. 65 (2014-10-01), Heft 18, S. 147-159 |
Veröffentlichung: | 2014 |
Medientyp: | academicJournal |
ISSN: | 0022-0957 (print) |
DOI: | 10.1093/jxb/eru394 |
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