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VvCO and VvCOL1 , two CONSTANS homologous genes, are regulated during flower induction and dormancy in grapevine buds

VvCO and VvCOL1 , two CONSTANS homologous genes, are regulated during flower induction and... Two previously uncharacterized Vitis vinifera CONSTANS- like genes ( VvCO , VvCOL1 ), which are predicted to encode proteins with homology to members of the Arabidopis CONSTANS family, were identified. Under controlled conditions, both genes show a diurnal expression pattern with peak at dawn. During grapevine bud development, VvCOL1 is mainly expressed in dormancy, suggesting a participation in the transcriptional photoperiod control of bud dormancy induction and maintenance in this species. On the other hand, VvCO expression in latent buds is in agreement with a function during flowering induction. A spatial and temporal relationship in the expression of VvCO , VFY and VvMADS8 (the Arabidopsis LEAFY and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 orthologues) in latent buds is observed, suggesting that these genes are involved in the seasonal periodicity of flowering in grapevines. Furthermore, our results provide a new molecular insight into tendril development showing that grapevine CO homologues are also expressed in this distinctive organ. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Cell Reports Springer Journals

VvCO and VvCOL1 , two CONSTANS homologous genes, are regulated during flower induction and dormancy in grapevine buds

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References (47)

Publisher
Springer Journals
Copyright
Copyright © 2009 by Springer-Verlag
Subject
Life Sciences; Plant Biochemistry; Biotechnology; Plant Sciences ; Cell Biology
ISSN
0721-7714
eISSN
1432-203X
DOI
10.1007/s00299-009-0720-4
pmid
19495771
Publisher site
See Article on Publisher Site

Abstract

Two previously uncharacterized Vitis vinifera CONSTANS- like genes ( VvCO , VvCOL1 ), which are predicted to encode proteins with homology to members of the Arabidopis CONSTANS family, were identified. Under controlled conditions, both genes show a diurnal expression pattern with peak at dawn. During grapevine bud development, VvCOL1 is mainly expressed in dormancy, suggesting a participation in the transcriptional photoperiod control of bud dormancy induction and maintenance in this species. On the other hand, VvCO expression in latent buds is in agreement with a function during flowering induction. A spatial and temporal relationship in the expression of VvCO , VFY and VvMADS8 (the Arabidopsis LEAFY and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 orthologues) in latent buds is observed, suggesting that these genes are involved in the seasonal periodicity of flowering in grapevines. Furthermore, our results provide a new molecular insight into tendril development showing that grapevine CO homologues are also expressed in this distinctive organ.

Journal

Plant Cell ReportsSpringer Journals

Published: Aug 1, 2009

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