Spatiotemporal expression of duplicate AGAMOUS orthologues during floral development in Phalaenopsis

Song, In Ja; Nakamura, Toru; Fukuda, Tatsuya; Yokoyama, Jun; Ito, Takuro; Ichikawa, Hiroaki; Horikawa, Yo; Kameya, Toshiaki; Kanno, Akira

doi:10.1007/s00427-005-0057-0

Cited by 43 publications

(31 citation statements)

References 87 publications

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“…Subsequent duplication occurred among the orchid C-lineage genes in Epidendroideae and Orchidoideae, and there are two types of C-lineage genes in Cymbidium ensifolium (CeMADS1 and CeMADS2) and the Phalaenopsis hybrid cultivar 'Athens' (PhaMADS8 and PhaMADS10). Gene expression analyses in some orchid species such as Phalaenopsis equestris, C. ensifolium, and Orchis italica showed that the C-and D-lineage genes were expressed primarily in the column and ovaries (Acri-Nunes-Miranda and Mondragón-Palomino, 2014; Chen et al, 2012b;Hsu et al, 2010;Salemme et al, 2013;Skipper et al, 2006;Song et al, 2006;Wang et al, 2011;Xu et al, 2006). The D-lineage gene expression pattern in orchids differs from that of LMADS2 (L. longiflorum) and HoMADS1 (H. orientalis), which were expressed exclusively in ovules (Tzeng et al, 2002;Xu et al, 2004).…”

Section: -3) Orchid Flowersmentioning

confidence: 99%

Molecular Mechanism Regulating Floral Architecture in Monocotyledonous Ornamental Plants

Kanno

2016

The Hortic J

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Molecular and genetic analyses of flower development have been conducted primarily in dicot model plants such as Arabidopsis thaliana and Antirrhinum majus. The obtained data are the basis for the ABC model, which was extended to the ABCE model of floral development. This model has been validated in many dicot species using genetic transformation studies and mutant analyses. Many dicot flowers have two distinctive perianth whorls, which include greenish sepals and showy petals. By contrast, the monocot lily flower has two almost identical petaloid whorls, the inner and outer tepals. To explain this type of floral morphology, a modified ABC model, the further extended modified ABCE model, was proposed. According to this model, B-class genes are expressed in whorls 1-3, and whorls 1 and 2 form petaloid structures. This review describes the molecular mechanisms regulating flower development in monocots. Since the showy perianth is one of the most important traits in floricultural crops, we focused on the B-and C-class genes, which are related to the development and modification of the perianth. The review describes the expression patterns of floral organ identity genes, and presents functional studies using double-flowered and viridiflora cultivars in some monocot species. Besides lily-type flowers, there are several types of monocot flower, such as commelina type with two whorls of distinctive perianth, orchid and grass flowers. The review also describes the molecular analyses of these types of monocot flower.

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Section: -3) Orchid Flowersmentioning

confidence: 99%

Molecular Mechanism Regulating Floral Architecture in Monocotyledonous Ornamental Plants

Kanno

2016

The Hortic J

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“…PeMADS2-PeMADS5 fall into the class-B DEF/AP3-like gene family (Tsai et al 2004), whereas PeMADS6 belongs to the class-B GLO/PIlike gene family (Tsai et al 2005). PhalAG1 and PhalAG2 belong to AG-like C-and D-function gene families, respectively (Song et al 2006). Their expression patterns do not Wt the classical ABC model, indicating the limitation of this model.…”

Section: Introductionmentioning

confidence: 97%

SQUA-like genes in the orchid Phalaenopsis are expressed in both vegetative and reproductive tissues

Chen

Guo

Saiyin

et al. 2007

Planta

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The SQUA family (AP1/FUL family) of MADS-box genes plays an important role in the transition from the vegetative to the reproductive development of angiosperms, and its origin might be concurrent with fixation of floral structure in angiosperms. Here, we isolated two Phalaenopsis MADS-box genes designated ORAP11 and ORAP13, both of which belong to the monocot FUL-like clade of the SQUA family. RT-PCR showed that both genes are strongly expressed in the floral bud, and also detected in the vegetative organs. During later stages, ORAP11 was only detected in the column, but ORAP13 signal was absent from all of the floral organs. In-situ hybridization experiments detected both genes in the tips and margins of developing petals and lips, the developing column, and ovule. Over-expression of both genes in tobacco induced early flowering and changed plant architecture. Our results suggest that in Phalaenopsis, both genes might share partly redundant activities and play important roles in the process of floral transition and morphological architecture.

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“…Two AG-like genes, PhalAG1 and PhalAG2, were already reported from Phalaenopsis (Song et al, 2006). Weak phenotype of the ag-like Phalaenopsis variety may come from the functional redundancy of PhalAG1 and PhalAG2.…”

Section: Flower Phenotypes (A) Phalaenopsis Pltants Of Ag-like Varmentioning

confidence: 97%

A Phalaenopsis variety with floral organs showing C class homeotic transformation and its revertant may enable Phalaenopsis as a potential molecular genetic material

et al. 2011

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The Orchidaceae is one of the most famous garden plants, and improvement of the orchid is very important in horticulture field. However, molecular information is largely unknown. We found a Phalaenopsis variety harboring floral organs showing C class homeotic change. Column is composed of the anthers with the receptive stigmatic surface just underneath them in wild type. However the C class variety produced column with sepal or petal like structure at the abaxial side. This is the typical abnormality as C class mutants in plants. Further, wild type looking revertant was found from the meristem tissue cultured population. This result strongly indicates the existence of active transposable element in Phalaenopsis genome. This transposon may enable Phalaenopsis as a good material for molecular genetic analysis in Orchidaceae.

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Spatiotemporal expression of duplicate AGAMOUS orthologues during floral development in Phalaenopsis

Cited by 43 publications

References 87 publications

Molecular Mechanism Regulating Floral Architecture in Monocotyledonous Ornamental Plants

Molecular Mechanism Regulating Floral Architecture in Monocotyledonous Ornamental Plants

SQUA-like genes in the orchid Phalaenopsis are expressed in both vegetative and reproductive tissues

A Phalaenopsis variety with floral organs showing C class homeotic transformation and its revertant may enable Phalaenopsis as a potential molecular genetic material

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