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Arabidopsis thaliana VOZ (Vascular plant One-Zinc finger) transcription factors are required for proper regulation of flowering time

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dc.contributor.authorCelesnik, Helena, author
dc.contributor.authorAli, Gul S., author
dc.contributor.authorRobison, Faith M., author
dc.contributor.authorReddy, Anireddy S. N., author
dc.contributor.authorThe Company of Biologists Ltd., publisher
dc.date.accessioned2007-01-03T06:08:38Z
dc.date.available2007-01-03T06:08:38Z
dc.date.issued2013-04-15
dc.description.abstractTransition to flowering in plants is tightly controlled by environmental cues, which regulate the photoperiod and vernalization pathways, and endogenous signals, which mediate the autonomous and gibberellin pathways. In this work, we investigated the role of two Zn2+-finger transcription factors, the paralogues AtVOZ1 and AtVOZ2, in Arabidopsis thaliana flowering. Single atvoz1-1 and atvoz2-1 mutants showed no significant phenotypes as compared to wild type. However, atvoz1-1 atvoz2-1 double mutant plants exhibited several phenotypes characteristic of flowering-time mutants. The double mutant displayed a severe delay in flowering, together with additional pleiotropic phenotypes. Late flowering correlated with elevated expression of FLOWERING LOCUS C (FLC), which encodes a potent floral repressor, and decreased expression of its target, the floral promoter FD. Vernalization rescued delayed flowering of atvoz1-1 atvoz2-1 and reversed elevated FLC levels. Accumulation of FLC transcripts in atvoz1-1 atvoz2-1 correlated with increased expression of several FLC activators, including components of the PAF1 and SWR1 chromatin-modifying complexes. Additionally, AtVOZs were shown to bind the promoter of MOS3/SAR3 and directly regulate expression of this nuclear pore protein, which is known to participate in the regulation of flowering time, suggesting that AtVOZs exert at least some of their flowering regulation by influencing the nuclear pore function. Complementation of atvoz1-1 atvoz2-1 with AtVOZ2 reversed all double mutant phenotypes, confirming that the observed morphological and molecular changes arise from the absence of functional AtVOZ proteins, and validating the functional redundancy between AtVOZ1 and AtVOZ2.
dc.description.sponsorshipPublished with support from the Colorado State University Libraries Open Access Research and Scholarship Fund.
dc.format.mediumborn digital
dc.format.mediumarticles
dc.identifier.bibliographicCitationCelesnick, Helena, Gul S. Ali, Faith M. Robison and Anireddy S. N. Reddy, Arabidopsis Thaliana VOZ (Vascular Plant One-Zinc Finger) Transcription Factors Are Required For Proper Regulation of Flowering Time. Biology Open 2, no. 4 (April 15, 2013): 424-431. http://dx.doi.org/10.1242/bio.20133764
dc.identifier.doihttps://dx.doi.org/10.1242/bio.20133764
dc.identifier.urihttp://hdl.handle.net/10217/80925
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartofOpen Access Research and Scholarship Fund (OARS)
dc.rights.licenseThis article is open access and distributed under the terms and conditions of the Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0).
dc.rights.urihttps://creativecommons.org/licenses/by-sa/3.0/
dc.subjectVOZ
dc.subjectflowering
dc.subjectFLC
dc.subjectMOS
dc.subjectArabidopsis
dc.titleArabidopsis thaliana VOZ (Vascular plant One-Zinc finger) transcription factors are required for proper regulation of flowering time
dc.typeText

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