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Family affiliation, sexratio and sporophyte frequency in unisexual mosses
Swedish Museum of Natural History, Department of Botany. (Reproductive Biology of Bryophytes)
Swedish Museum of Natural History, Department of Botany.
2014 (English)In: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 174, 163-172 p.Article in journal (Refereed) Published
Abstract [en]

Patterns of sex expression and sex ratios are key features of the life histories of organisms. Bryophytes are the only haploid-dominant land plants. In contrast with seed plants, more than half of bryophyte species are dioecious, with rare sexual expression and sporophyte formation and a commonly female-biased sex ratio. We asked whether variation in sex expression, sex ratio and sporophyte frequency in ten dioecious pleurocarpous wetland mosses of two different families was best explained by assuming that character states  evolved: (1) in ancestors within the respective families or (2) at the species level as a response to recent habitat conditions. Lasso regression shrinkage identified relationships between family membership and sex ratio and sporophyte frequency, whereas environmental conditions were not correlated with any investigated reproductive trait. Sex ratio and sporophyte frequency were correlated with each other. Our results suggest that ancestry is more important than the current environment in explaining reproductive patterns at and above the species level in the studied wetland mosses, and that mechanisms controlling sex ratio and sporophyte frequency are phylogenetically conserved. Obviously, ancestry should be considered in the study of reproductive character state variation in plants.

Place, publisher, year, edition, pages
2014. Vol. 174, 163-172 p.
Keyword [en]
bryophytes, phylogeny, plant sex ratio regulation, pleurocarpous mosses
National Category
Ecology Evolutionary Biology
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-291DOI: 10.1111/boj.12135OAI: oai:DiVA.org:nrm-291DiVA: diva2:717767
Funder
Swedish Research Council, 621-2003-3338
Available from: 2014-05-16 Created: 2014-05-16 Last updated: 2014-05-19Bibliographically approved

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Bisang, IreneHedenäs, Lars
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CiteExportLink to record
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Citation style
  • apa
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