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A darklight transition triggers expression of the floral promoter CrFTL1 and downregulates CONSTANS-like genes in a short-day plant Chenopodium rubrum
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SYSNO ASEP 0429593 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A darklight transition triggers expression of the floral promoter CrFTL1 and downregulates CONSTANS-like genes in a short-day plant Chenopodium rubrum Author(s) Drabešová, Jana (UEB-Q) RID
Cháb, David (UEB-Q)
Kolář, Jan (UEB-Q)
Haškovcová, Kateřina (UEB-Q)
Štorchová, Helena (UEB-Q) RID, ORCIDSource Title Journal of Experimental Botany. - : Oxford University Press - ISSN 0022-0957
Roč. 65, č. 8 (2014), s. 2137-2146Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords Chenopodium rubrum ; CONSTANS-like ; flowering Subject RIV EB - Genetics ; Molecular Biology R&D Projects GA522/05/0300 GA ČR - Czech Science Foundation (CSF) GAP506/12/1359 GA ČR - Czech Science Foundation (CSF) Institutional support UEB-Q - RVO:61389030 UT WOS 000335002800020 DOI 10.1093/jxb/eru073 Annotation The floral promoter CrFTL1 is activated by light exposure in Chenopodium rubrum, showing peaks of expression anti-phasic to CONSTANS-like genes. This activation mode is unique among short-day plants.The proper timing of flowering is essential for the adaptation of plant species to their ever-changing environments. The central position in a complex regulatory network is occupied by the protein FT, which acts as a florigen. We found that light, following a permissive period of darkness, was essential to induce the floral promoter CrFTL1 and to initiate flowering in seedlings of the short-day plant Chenopodium rubrum L. We also identified two novel CONSTANS-like genes in C. rubrum and observed their rhythmic diurnal and circadian expressions. Strong rhythmicity of expression suggested that the two genes might have been involved in the regulation of photoperiod-dependent processes, despite their inability to complement co mutation in A. thaliana. The CrCOL1 and CrCOL2 genes were downregulated by darklight transition, regardless of the length of a preceding dark period. The same treatment activated the floral promoter CrFTL1. Light therefore affected CrCOL and CrFTL1 in an opposite manner. Both CrCOL genes and CrFTL1 displayed expression patterns unique among short-day plants. Chenopodium rubrum, the subject of classical physiological studies in the past, is emerging as a useful model for the investigation of flowering at the molecular level. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2015
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