Regulation of Arabidopsis flower development.

Okamuro, Jack K.; Boer, Bart G. W. den; Jofuku, K. Diane

doi:10.1105/tpc.5.10.1183

Cited by 95 publications

(23 citation statements)

References 39 publications

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“…EREBPs are almost surely involved in plant hormonal signal transduction, binding to DNA sequences required for the induction of pathogenesis-related protein genes in response to ethylene (Ohme-Takagi and Shinshi, 1995). In addition, AP2 has been reported to be potentially involved in the gibberellin signal transduction pathway (Okamuro et al, 1993). Whether roles in plant hormone signal transduction will be a general phenomenon for AP2 domain proteins remains to be determined.…”

Section: Dna Binding Proteinsmentioning

confidence: 99%

The AINTEGUMENTA Gene of Arabidopsis Required for Ovule and Female Gametophyte Development Is Related to the Floral Homeotic Gene APETALA2

Klucher¹,

Chow²,

Reiser³

et al. 1996

The Plant Cell

151

247

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Ovules play a central role in plant reproduction, generating the female gametophyte within sporophytic integuments. When fertilized, the integuments differentiate into the seed coat and support the development of the embryo and endosperm. Mutations in the AINTEGUMENTA (ANT) locus of Arabidopsis have a profound effect on ovule development. Strong ant mutants have ovules that fail to form integuments or a female gametophyte. Flower development is also altered, with a random reduction of organs in the outer three whorls. In addition, organs present in the outer three floral whorls often have abnormal morphology. Ovules from a weak ant mutant contain both inner and outer integuments but generally fail to produce a functional female gametophyte. We isolated the ANT gene by using a mutation derived by T-DNA insertional mutagenesis. ANT is a member of a gene family that includes the floral homeotic gene APETALA2 (AP2). Like AP2, ANT contains two AP2 domains homologous with the DNA binding domain of ethylene response element binding proteins. ANT is expressed most highly in developing flowers but is also expressed in vegetative tissue. Taken together, these results suggest that ANT is a transcription factor that plays a critical role in regulating ovule and female gametophyte development.

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Section: Dna Binding Proteinsmentioning

confidence: 99%

The AINTEGUMENTA Gene of Arabidopsis Required for Ovule and Female Gametophyte Development Is Related to the Floral Homeotic Gene APETALA2

Klucher¹,

Chow²,

Reiser³

et al. 1996

The Plant Cell

151

247

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“…In Arabidopsis the A class genes APETALA1 and APETALA2 are required to specify the identity of the perianth, and are active in the first two whorls of organs (Irish and Sussex 1990;Bowman et al 1993;Okamura et al 1993). The B class genes APETALA3 and PISTILLATA are required together for specification of petal and stamen identity in the second and third whorls, respectively (Jack et al 1992;Goto and Meyerowitz 1994).…”

Section: Introductionmentioning

confidence: 99%

Molecular cloning of ABNORMAL FLORAL ORGANS : a gene required for flower development in Arabidopsis

Kumaran

Yang

et al. 1999

Sexual Plant Reproduction

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We report the cloning and characterization of the gene ABNORMAL FLORAL ORGANS (AFO), which is required for normal flower development in Arabidopsis. afo mutant flowers show defects in all four floral whorls. The number of organs in each whorl varies. Most flowers consist of reduced numbers of petals and stamens, even though supernumerary sepals and carpels may be observed. Abnormal organ structure is evident from an early stage. Mosaic first whorl organs are common, with some sepals taking on petaloid or staminoid characteristics. Stamens are often deformed, having thin filaments and reduced anthers, yet occasionally producing viable pollen. Partial fertility is indicated by some seed setting. The afo-1 mutation is caused by insertion of a gene trap Ds transposable element. The AFO gene was cloned and is predicted to encode a novel protein of 229 amino acids. The expression of AFO mRNA by northern blot analysis in combination with mutant phenotype suggests that the AFO gene product plays an important role in Arabidopsis flower development. We also report that antherless, a previously described male-sterile mutation, is allelic to afo-1.

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“…Recently, there has been a renaissance of interest in the subject. Now that the sex determination of many animal species has been extensively elucidated (Cline, 1993;Gubbay et al, 1990;Hodgkin, 1990;Keyes et al, 1992;Koopman et al, 1991, McKeown andMadigan, 1992) (this volume) and genes regulating flower development have been cloned Okamura et al, 1993), the question of how sex is determined in flowering plants has become approachable. In this review, we present some of the species that are now used as models for molecular studies of sex determination.…”

Section: Introductionmentioning

confidence: 99%

Genetics of sex determination in flowering plants

et al. 1994

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Most flowering plant species are hermaphroditic, but a small number of species in most plant families are unisexual (i.e., an individual will produce only male or female gametes). Because species with unisexual flowers have evolved repeatedly from hermaphroditic progenitors, the mechanisms controlling sex determination in flowering plants are extremely diverse. Sex is most strongly determined by genotype in all species but the mechanisms range from a single controlling lacus to sex chromosomes bearing several linked loci required for sex determination. Plant hormones also influence sex expression with variable effects from species to species. Here, we review the genetic control of sex determination from a number of plant species to illustrate the variety of extant mechanisms. We emphasize species that are now used as models to investigate the molecular biology of sex determination. We also present our own investigations of the structure of plant sex chromosomes of white campion (Silene latifolia = Melandrjum album). The cytogenetic basis of sex determination in white campion is similar to mammals in that it has a male-specific Y-chromosome that carries dominant male determining genes. If one copy of this chromosome is in the genome, the plant is male. Otherwise it is female. Like mammalian Y-chromosomes, the white campion Y-chromosome is rich in repetitive DNA. We isolated repetitive sequences from microdissected Y-chromosomes of white campion to study the distribution of homologous repeated sequences on the Y-chromosome and the other chromosomes. We found the Y to be especially rich in repetitive sequences that were generally dispersed over all the white campion chromosomes. Despite its repetitive character, the Y-chromosome is mainly euchromatic. This may be due to the relatively recent evolution of the white campion sex chromosomes compared to the sex chromosomes of animals.

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Regulation of Arabidopsis flower development.

Cited by 95 publications

References 39 publications

The AINTEGUMENTA Gene of Arabidopsis Required for Ovule and Female Gametophyte Development Is Related to the Floral Homeotic Gene APETALA2

The AINTEGUMENTA Gene of Arabidopsis Required for Ovule and Female Gametophyte Development Is Related to the Floral Homeotic Gene APETALA2

Molecular cloning of ABNORMAL FLORAL ORGANS : a gene required for flower development in Arabidopsis

Genetics of sex determination in flowering plants

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