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Dioecious Silene latifolia plants show sexual dimorphism in the vegetative stage

J. Žlůvová,J. Zak,B. Janoušek,B. Vyskot

Published 2010 in BMC Plant Biology

ABSTRACT

BackgroundPrior 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.ResultsWe 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.ConclusionsTo our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.

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