Dioecious Silene latifolia plants show sexual dimorphism in the vegetative stage.
BACKGROUND
Prior to this study, no differences in gene expression between male and female dioecious plants in the vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering.


RESULTS
We present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette stage before the first flowering season.


CONCLUSIONS
To our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
Zluvova
Jitka
J
Department of Plant Developmental Genetics, Institute of Biophysics AS CR v. v. i., Kralovopolska 135, 612 65 Brno, Czech Republic. jitka@ibp.cz
Zak
Jiri
J
Janousek
Bohuslav
B
Vyskot
Boris
B
D018744:DNA, Plant / Q000235:genetics; D020224:Expressed Sequence Tags; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D010802:Phylogeny; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D012727:Sex Characteristics; D029751:Silene / Q000235:genetics / Q000254:growth & development*
D018744:DNA, Plant