Sex Determination in Dioecious Silene Iatifolia (Effects of the Y Chromosome and the Parasitic Smut Fungus (Ustilago violacea) on Gene Expression during Flower Development) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Plant Physiology Année : 1997

Sex Determination in Dioecious Silene Iatifolia (Effects of the Y Chromosome and the Parasitic Smut Fungus (Ustilago violacea) on Gene Expression during Flower Development)

C. Scutt
Y. Li
  • Fonction : Auteur
S. Robertson
M. Willis
  • Fonction : Auteur
P. Gilmartin
  • Fonction : Auteur

Résumé

Abstract We have embarked on a molecular cloning approach to the investigation of sex determination in Silene Iatifolia Poiret, a dioecious plant species with morphologically distinguishable sex chromosomes. One of our key objectives was to define a range of genes that are up-regulated in male plants in response to Y chromosome sex-determination genes. Here we present the characterization of eight male-specific cDNA sequences and classify these according to their expression dynamics to provide a range of molecular markers for dioecious male flower development. Genetically female S. latifolia plants undergo a partial sex reversal in response to infection by the parasitic smut fungus Ustilago violacea. This phenomenon has been exploited in these studies; male-specific cDNAs have been further categorized as inducible or noninducible in female plants by smut fungus infection. Analysis of the organ-specific expression of male-specific probes in male and female flowers has also identified a gene that is regulated in a sex-specific manner in nonreproductive floral tissues common to both male and female plants. This observation provides, to our knowledge, the first molecular marker for dominant effects of the Y chromosome in nonreproductive floral organs.

Dates et versions

hal-03380498 , version 1 (15-10-2021)

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Citer

C. Scutt, Y. Li, S. Robertson, M. Willis, P. Gilmartin. Sex Determination in Dioecious Silene Iatifolia (Effects of the Y Chromosome and the Parasitic Smut Fungus (Ustilago violacea) on Gene Expression during Flower Development). Plant Physiology, 1997, 114 (3), pp.969-979. ⟨10.1104/pp.114.3.969⟩. ⟨hal-03380498⟩
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