A developmental switch sufficient for flower initiation in diverse plants

@article{Weigel1995ADS,  title={A developmental switch sufficient for flower initiation in diverse plants},  author={Detlef Weigel and Ove Nilsson},  journal={Nature},  year={1995},  volume={377},  pages={495-500},  url={https://api.semanticscholar.org/CorpusID:4346606}}
Transgenic plants in which the flower-meristem-identity gene LEAFY of Arabidopsis is constitutively expressed are generated, suggesting a new level of regulation during flower development, as indicated by the competence of the main shoot to respond to LEAFy activity.

807 Citations

Environmental-Dependent Acceleration of a Developmental Switch: The Floral Transition

Two recent reports that characterize the FLOWERING LOCUS T gene in Arabidopsis appear to encode a membrane-associated protein that could function in signaling from the cell surface, which is part of the floral transition pathway.

Activation of a floral homeotic gene in Arabidopsis.

Analysis of a LEAFY-responsive enhancer in the homeotic gene AGAMOUS indicates that direct interaction of LEAFy with this enhancer is required for its activity in plants, and indicates that LEafY is a direct upstream regulator of floral homeotic genes.

Switching on Flowers: Transient LEAFY Induction Reveals Novel Aspects of the Regulation of Reproductive Development in Arabidopsis

Using transient steroid-dependent LEAFY (LFY) activation in lfy null mutant Arabidopsis plants, it is shown that the plant’s competence to respond to the LFY signal changes during development, shedding light on how plants can fine-tune important phase transitions and developmental responses.

Flowers into shoots: photo and hormonal control of a meristem identity switch in Arabidopsis.

It is proposed that LFY and AG play an important role in the maintenance of flower meristem identity and that floralMeristem reversion in heterozygous lfy and in ag flowers is regulated by a phytochrome and gibberellin signal transduction cascade.

The LEAFY Floral Regulators in Angiosperms: Conserved Proteins with Diverse Roles

Several recent reports enlighten the structure and function of this conserved protein but also illustrate the variety of roles it plays in different angiosperms.
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23 References

Activation of Floral Homeotic Genes in Arabidopsis

The identity of floral organs in Arabidopsis thaliana is determined by homeotic genes, which are expressed in specific regions of the developing flower, and these are the floral meristem—identity genes LEAFY and APETALA1.

The genetics of flower development: from floral induction to ovule morphogenesis.

This review summarizes recent advances in the understanding of the genetic control of floral induction and determination of flower-meristem identity, with the focus on Arabidopsis thaliana.

LEAFY Interacts with Floral Homeotic Genes to Regulate Arabidopsis Floral Development.

It is suggested that the products of LEAFY, APETALA1, and APetALA2 together control the differentiation of lateral meristems as flowers rather than as inflorescence branches.

LEAFY, a Homeotic Gene That Regulates Inflorescence Development in Arabidopsis.

Results from double mutant analysis, showing that lfy-1 is epistatic to the floral organ homeotic gene ap2-6, are consistent with the hypothesis that a functional LFY gene is necessary for the expression of downstream genes controlling floral organ identity.

Genetic analysis of the floral initiation process (FLIP) in Arabidopsis

Besides their role in establishing the floral program, phenotypes of flower-like lateral shoots in mutant inflorescences suggest that all three, LEAFY, APETALA1 and APETalA2, influence expression of whorl identity genes.

UFO: an Arabidopsis gene involved in both floral meristem and floral organ development.

Genetic interactions that prevent flower formation and lead to the generation of filamentous structures implicate UFO as a member of a new, large, and diverse class of genes in Arabidopsis necessary for flower formation.

Function of the apetala-1 gene during Arabidopsis floral development.

It is proposed that the AP1 and the apetala 2 (AP2) genes may encode similar functions that are required to define the pattern of where floral organs arise, as well as for determinate development of the floral meristem.

Molecular basis of the cauliflower phenotype in Arabidopsis

Genetic studies demonstrate that two Arabidopsis genes, CAULIFLOWER and APETALA1, encode partially redundant activities involved in the formation of floral meristems, the first step in the…

Control of flower development in Arabidopsis thaliana by APETALA1 and interacting genes

The results suggest that the products of APETALA1 and another gene, LEAFY, are required to ensure that primordia arising on the flanks of the inflorescence apex adopt a floral fate, as opposed to becoming an inflorescence shoot.

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