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Family affiliation, sexratio and sporophyte frequency in unisexual mosses
Naturhistoriska riksmuseet, Enheten för botanik. (Reproductive Biology of Bryophytes)
Naturhistoriska riksmuseet, Enheten för botanik.
2014 (engelsk)Inngår i: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 174, s. 163-172Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2014. Vol. 174, s. 163-172
Emneord [en]
bryophytes, phylogeny, plant sex ratio regulation, pleurocarpous mosses
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Identifikatorer
URN: urn:nbn:se:nrm:diva-291DOI: 10.1111/boj.12135OAI: oai:DiVA.org:nrm-291DiVA, id: diva2:717767
Forskningsfinansiär
Swedish Research Council, 621-2003-3338Tilgjengelig fra: 2014-05-16 Laget: 2014-05-16 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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