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Brief Communications
Nature 417, 707 (13 June 2002) | doi:10.1038/417707a
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Enantiostyly: Solving the puzzle of mirror-image flowers
Linley K. Jesson & Spencer C. H. Barrett
Abstract
The genetically controlled orientation of floral sex organs encourages cross-pollination.
Enantiostyly is a plant sexual polymorphism in which female sex organs are deflected to the left or right — resulting in 'mirror-image' flowers — but, although it occurs in at least a dozen unrelated families of flowering plants1 and has been known for over a century2, its adaptive significance has been unclear. Here we show that a mendelian locus governs the inheritance of style orientation and that this curious form of sexual asymmetry functions to promote cross-pollination in bee-pollinated plants.
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