Integration of reproductive meristem fates by a
            <i>SEPALLATA</i>
            -like MADS-box gene

Uimari, Anne; Kotilainen, Mika; Elomaa, Paula; Yu, Deyue; Albert, Victor A.; Teeri, Teemu H.

doi:10.1073/pnas.0406844101

Cited by 115 publications

(127 citation statements)

References 40 publications

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“…Indeed, flowers from plants mutant simultaneously for three SEP genes still display a normal AG expression pattern, but entirely lack FM termination (Pelaz et al, 2000;Ditta et al, 2004). A similar commitment of class E proteins in FM termination was described in several other species, including petunia, gerbera (Gerbera hybrida), and tomato (Solanum lycopersicum; Angenent et al, 1994;Pnueli et al, 1994;Vandenbussche et al, 2003;Uimari et al, 2004). It is worth noting that in both petunia and rice, ovule identity (also called class D) genes also appear to promote FM termination (Ferrario et al, 2006;Dreni et al, 2007).…”

Section: Fm Termination Relies On a Complex Multilevel Activation Of Agmentioning

confidence: 56%

Time to Stop: Flower Meristem Termination

Prunet¹,

Morel²,

Negrutiu³

et al. 2009

Plant Physiol.

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Section: Fm Termination Relies On a Complex Multilevel Activation Of Agmentioning

confidence: 56%

Time to Stop: Flower Meristem Termination

Prunet¹,

Morel²,

Negrutiu³

et al. 2009

Plant Physiol.

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“…Many novel functions for these regulators have been detected using transgenic plants that show distinct phenotypes. The results emphasize the importance of using gerbera for comparative studies with other model species such as Arabidopsis thaliana (Yu et al 1999, Kotilainen et al 2000, Uimari et al 2004, Teeri et al 2006c. Recent studies have employed expressed sequence tag (EST) sequencing and cDNA microarrays for identification of new gene family members related to both secondary metabolism and flower development (Laitinen et al 2005).…”

Section: Biotechnology In Horticultural Speciesmentioning

confidence: 94%

Plant biotechnology for deeper understanding, wider use and further development of agricultural and horticultural crops

Elomaa¹,

Joensuu²,

Korpelainen³

et al. 2008

AFSci

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Plants bind solar energy to organic matter via photosynthesis and assimilation of carbon dioxide from the atmosphere and comprise the major source of nutrition and bioenergy. Plant biotechnology contributes to solution of important constraints in food and feed production and creates new technologies and applications for the sustainable use of plant resources. Genome-wide approaches such as massive parallel sequencing and microarrays to study gene expression, molecular markers for selection of important traits in breeding, characterization of genetic diversity with the aforementioned approaches, and somatic hybridization and genetic transformation are important tools in plant biotechnology. In this paper, studies carried out on enhanced resistance to viruses and tolerance of cold stress in potato, genetic modification of flower pigmentation and morphology in gerbera, production of edible vaccines in transgenic barley seeds, and expression of heterologous proteins for pharmaceutical purposes from vector viruses were chosen to exemplify the general utility of biotechnological approaches and also how plant biotechnology research has developed on cultivated plants at University of Helsinki. The studies reveal cellular and genetic mechanisms and provide scientific information that can be used for widening the uses of crop plants. They can also be used to detect any putative risks associated with the use of the biotechnological application in agriculture and horticulture and to develop practises which reduce any inadvertent negative consequences that plant production may have to the environment.

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“…39, with the following exceptions: probe concentration was 0.7 g/ml/kb and detection time was 40 -45 h. SEM analysis of the Gerbera flower primordia was performed as described in ref. 5.…”

Section: Methodsmentioning

confidence: 99%

“…We have shown that many MADS box genes encoding known regulators of flower organ development are expressed gradientially along the capitulum radius. While this may suggest that different MADS protein complexes participate in developmental regulation of individual flower types, transgenic experiments show that such complexes are not independently sufficient (4,5). Indeed, classical genetics has shown that the presence or absence of ray flowers in Asteraceae capitula appears to be under control of one or two major and several modifier genes (reviewed in ref.…”

mentioning

confidence: 99%

A TCP domain transcription factor controls flower type specification along the radial axis of the Gerbera (Asteraceae) inflorescence

Broholm

Tähtiharju

Laitinen

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

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214

249

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Several key processes in plant development are regulated by TCP transcription factors. CYCLOIDEA-like (CYC-like) TCP domain proteins have been shown to control flower symmetry in distantly related plant lineages. Gerbera hybrida, a member of one of the largest clades of angiosperms, the sunflower family (Asteraceae), is an interesting model for developmental studies because its elaborate inflorescence comprises different types of flowers that have specialized structures and functions. The morphological differentiation of flower types involves gradual changes in flower size and symmetry that follow the radial organization of the densely packed inflorescence. Differences in the degree of petal fusion further define the distinct shapes of the Gerbera flower types. To study the role of TCP transcription factors during specification of this complex inflorescence organization, we characterized the CYC-like homolog GhCYC2 from Gerbera. The expression of GhCYC2 follows a gradient along the radial axis of the inflorescence. GhCYC2 is expressed in the marginal, bilaterally symmetrical ray flowers but not in the centermost disk flowers, which are nearly radially symmetrical and have significantly less fused petals. Overexpression of GhCYC2 causes disk flowers to obtain morphologies similar to ray flowers. Both expression patterns and transgenic phenotypes suggest that GhCYC2 is involved in differentiation among Gerbera flower types, providing the first molecular evidence that CYC-like TCP factors take part in defining the complex inflorescence structure of the Asteraceae, a major determinant of the family's evolutionary success.CYCLOIDEA ͉ flower development ͉ evo-devo ͉ organ fusion

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Integration of reproductive meristem fates by a SEPALLATA -like MADS-box gene

Cited by 115 publications

References 40 publications

Time to Stop: Flower Meristem Termination

Time to Stop: Flower Meristem Termination

Plant biotechnology for deeper understanding, wider use and further development of agricultural and horticultural crops

A TCP domain transcription factor controls flower type specification along the radial axis of the Gerbera (Asteraceae) inflorescence

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