AVAG2 is a putative D-class gene from an ornamental asparagus

Yun, Pil-Yong; Kim, So Young; Ochiai, Tetsuyuki; Fukuda, Tatsuya; Ito, Takuro; Kanno, Akira; Kameya, Toshiaki

doi:10.1007/s00497-004-0223-y

Cited by 19 publications

(17 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…b bract, im inflorescence meristem, fm floral meristem, fp floral primordium, otp outer tepal primordium, lp lip primordium, lpj lip projection, ot outer tepal, it inner tepal, l lip, c column, p pollinium, r rostellium, o ovule, ow ovary wall, s stigma, sc stigmatic cavity, aoa apex of anther, v viscidium, t tegula. Bar: 0.5 mm (Vandenbussche et al 2003;Kramer et al 2004;Yun et al 2004b). In particular, Kramer et al (2004) found that AGlike genes have diagnostic amino acid motifs in the Cterminal regions that are denoted as AG motifs I and II.…”

Section: Cdna Cloning Of Ag-like Genes From Phalaenopsismentioning

confidence: 99%

“…These motifs appear to be conserved in many AG homologs in angiosperms (Kramer et al 2004), although their functions have not yet been characterized. In addition, upon alignment of the known D-class genes, Yun et al (2004b) found a nine amino acid motif downstream of the AG motif II in monocots which is called MD motif. When we aligned the known AG-like genes with PhalAG1 and PhalAG2, we found that both bear the AG motifs I and II at their C-termini (Fig.…”

Section: Cdna Cloning Of Ag-like Genes From Phalaenopsismentioning

confidence: 99%

See 1 more Smart Citation

Spatiotemporal expression of duplicate AGAMOUS orthologues during floral development in Phalaenopsis

et al. 2006

Self Cite

View full text Add to dashboard Cite

The AGAMOUS (AG) family of MADS-box genes plays important roles in controlling the development of the reproductive organs of flowering plants. To understand the molecular mechanisms behind the floral development in the orchid, we isolated and characterized two AG-like genes from Phalaenopsis that we denoted PhalAG1 and PhalAG2. Phylogenetic analysis indicated that PhalAG1 and PhalAG2 fall into different phylogenetic positions in the AG gene family as they belong to the C- and D-lineages, respectively. Reverse transcription-polymerase chair reaction (RT-PCR) analyses showed that PhalAG1 and PhalAG2 transcripts were detected in flower buds but not in vegetative organs. Moreover, in situ hybridization experiments revealed that PhalAG1 and PhalAG2 hybridization signals were observed in the lip, column, and ovule during the floral development of Phalaenopsis, with little difference between the expression patterns of the two genes. These results suggest that both AG-like genes in Phalaenopsis act redundantly with each other in floral development.

show abstract

Section: Cdna Cloning Of Ag-like Genes From Phalaenopsismentioning

confidence: 99%

Section: Cdna Cloning Of Ag-like Genes From Phalaenopsismentioning

confidence: 99%

Spatiotemporal expression of duplicate AGAMOUS orthologues during floral development in Phalaenopsis

et al. 2006

Self Cite

View full text Add to dashboard Cite

show abstract

“…D-lineage AG-like genes were isolated from A. virgatus (AVAG2) and Agapanthus praecox (ApMADS2). AVAG2 was expressed in stamens and carpels during the early stage of floral development, and expressed in ovules at later stages of floral development (Yun et al, 2004b). ApMADS2 has not been characterized yet.…”

Section: -2) Lily-type Flowers-a Perianth With Two Petaloid Whorlsmentioning

confidence: 99%

Molecular Mechanism Regulating Floral Architecture in Monocotyledonous Ornamental Plants

Kanno

2016

The Hortic J

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…In monocots, a similar expression profile has been reported for the rice gene MADS13, its maize ortholog ZAG2, the lily (Lilium longiflorum) gene LMADS2, and MADS1 from hyacinth (Hyacinthus orientalis). However, expression in stamens has also been shown for monocot AGL11 lineage genes, for example, MADS21 in rice (Dreni et al, 2007) and AVAG2 in asparagus (Asparagus officinalis; Yun et al, 2004). Thus, it seems plausible that the angiosperm AGL11 lineage ancestral gene had an expression pattern already restricted to the ovules and annexed ovary tissues and that the conservation of this expression domain, and the related D-function, is less strict in monocots when compared with core eudicots.…”

Section: Conservation Of Expression Of Ag and Agl11 Lineage Genesmentioning

confidence: 99%

Functional Analysis of All AGAMOUS Subfamily Members in Rice Reveals Their Roles in Reproductive Organ Identity Determination and Meristem Determinacy

et al. 2011

View full text Add to dashboard Cite

Reproductive organ development is one of the most important steps in the life cycle of plants. Studies using core eudicot species like thale cress (Arabidopsis thaliana) and snapdragon (Antirrhinum majus) have shown that MADS domain transcription factors belonging to the AGAMOUS (AG) subfamily regulate the identity of stamens, carpels, and ovules and that they are important for floral meristem determinacy. Here, we investigate the genetic interactions between the four rice (Oryza sativa) AG subfamily members, MADS3, MADS13, MADS21, and MADS58. Our data show that, in contrast with previous reports, MADS3 and MADS58 determine stamen and carpel identity and, together with MADS13, are important for floral meristem determinacy. In the mads3 mads58 double mutant, we observed a complete loss of reproductive organ identity and massive accumulation of lodicules in the third and fourth floral whorls. MADS21 is an AGL11 lineage gene whose expression is not restricted to ovules. Instead, its expression profile is similar to those of class C genes. However, our genetic analysis shows that MADS21 has no function in stamen, carpel, or ovule identity determination.

show abstract

AVAG2 is a putative D-class gene from an ornamental asparagus

Cited by 19 publications

References 47 publications

Spatiotemporal expression of duplicate AGAMOUS orthologues during floral development in Phalaenopsis

Spatiotemporal expression of duplicate AGAMOUS orthologues during floral development in Phalaenopsis

Molecular Mechanism Regulating Floral Architecture in Monocotyledonous Ornamental Plants

Functional Analysis of All AGAMOUS Subfamily Members in Rice Reveals Their Roles in Reproductive Organ Identity Determination and Meristem Determinacy

Contact Info

Product

Resources

About