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PMID:21771123

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Citation

Weingartner, M, Subert, C and Sauer, N (2011) LATE, a C(2)H(2) zinc-finger protein that acts as floral repressor. Plant J. 68:681-92

Abstract

The transition from vegetative to generative development is a major developmental switch in flowering plants and is critical for reproductive success. This transition requires reprogramming of lateral primordia at the shoot apical meristem, which leads to the formation of determinate floral meristems instead of leaves. In Arabidopsis, flowering is induced by a network of interacting pathways. In the photoperiod-dependent pathway, the two key elements mediating the effect of day length on flowering time are the transcription factors CONSTANS (CO) and the phloem mobile flowering signal FLOWERING LOCUS T (FT). Here, we identify a factor that is critically involved in this flowering response. The gene, which we named LATE FLOWERING (LATE), encodes a C(2)H(2) -type zinc-finger transcriptional regulator, and is expressed in the leaf vasculature and the vegetative shoot apical meristem. Ectopic expression of LATE in all tissues results in a dose-dependent phenotype characterized by late flowering, altered floral organ identity and sterile flowers. Using tissue-specific promoters, we further show that LATE controls the transition to flowering at two levels: first, it regulates the expression of flowering time genes in the leaf vasculature, and second, it interferes with floral meristem identity genes at the apex.

Links

PubMed Online version:10.1111/j.1365-313X.2011.04717.x

Keywords

Arabidopsis/genetics; Arabidopsis/metabolism; Arabidopsis Proteins/genetics; Arabidopsis Proteins/metabolism; Flowers/genetics; Flowers/growth & development; Gene Expression Regulation, Plant; Meristem/genetics; Meristem/growth & development; Photoperiod; Repressor Proteins/genetics; Repressor Proteins/metabolism; Zinc Fingers

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

ARATH:LATE

involved_in

GO:0009910: negative regulation of flower development

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:LATE

located_in

GO:0005634: nucleus

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

ARATH:LATE

acts_upstream_of_or_within

GO:0048579: negative regulation of long-day photoperiodism, flowering

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:LATE

acts_upstream_of_or_within

GO:0042752: regulation of circadian rhythm

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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