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Descripción
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| Winter dormancy is the mechanism used by perennial plants to survive the harsh conditions of winter in temperate and cold regions. It defined the geographical distribution of tree species (Johansson et al., 2015). The amount of light hours (photoperiod) has a latitudinal gradient, which determined seasonal developmental processes in plants, like flowering and dormancy (Kubota et al., 2015). The circadian clock and some of its outputs have been implicated in that adaptation (de Montaigu et al., 2014). In poplar, knocking down LATE ELONGATED HYPOCOTYL1 and 2 (LHY1/2) or TIMING OF CAB EXPRESSION1 (TOC1) circadian clock genes, makes trees show a late dormancy entrance (Ibáñez et al., 2010). Nevertheless, the molecular mechanism behind this phenotype as well as how light signalling is transduced up to the circadian clock is not well understood. In this work we are interested in unravelling the transcriptional regulation of poplar LHY2. We show PtLHY2 has changes in its phase and amplitude between short and long days. We also describe that night hours regulate LHY2 expression. This regulation is different either advancing or extending the night. Our results may shed light on how the circadian clock reset every day, fundamental information to establish dormancy entrance. | |
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Internacional
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Si |
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Nombre congreso
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Workshop New Frontiers in Plant Biology |
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Tipo de participación
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970 |
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Lugar del congreso
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Centro de Biotecnología y Genómica de Plantas |
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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15/06/2016 |
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Fecha fin congreso
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17/06/2016 |
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Desde la página
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31 |
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Hasta la página
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31 |
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Título de las actas
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Night regulates LHY2 in poplar |