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- W2098035325 abstract "In addition to genetic load, the induction of maleness in leptosporangiate gametophytes by the pheromone antheridiogen may facilitate rates of outcrossing similar to those found in angiosperms. The antheridiogens that have been chemically identified are similar to gibberellins and probably evolved from this common plant hormone. The purposes of this study were to determine the functions of endogenous gibberellins in morphological development and gender expression in leptosporangiate fern gametophytes and to elucidate how antheridiogens may have evolved from gibberellin precursors. We grew gametophytes of Osmunda regalis and Athyrium filix-femina on nutrient agar enriched with APOGEE, which blocks gibberellin synthesis. Osmunda regalis is a member of Osmundaceae, the only family in Osmundales, the sister group of all remaining extant leptosporangiate ferns. This family possesses a male-first gender in isolation and lacks any known antheridiogen systems. In contrast, A. filix-femina is a member of a derived family, Woodsiaceae, which possesses antheridiogen systems. Disruption of gibberellin synthesis retarded notch development and expression of both maleness and femaleness (i.e. gender status) in both species. On the basis of these results, we offer a simple model of gametophyte evolution driven by gender-based fitness gain curves and the influence of exogenous gibberellins. © 2009 The Linnean Society of London, Botanical Journal of the Linnean Society, 2009, 159, 599–615." @default.
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- W2098035325 date "2009-04-01" @default.
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- W2098035325 title "Morphological functions of gibberellins in leptosporangiate fern gametophytes: insights into the evolution of form and gender expression" @default.
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- W2098035325 doi "https://doi.org/10.1111/j.1095-8339.2009.00956.x" @default.
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