Discovery of long-distance gamete dispersal in a lichen-forming ascomycete

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http://hdl.handle.net/10138/223787

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Ronnas , C , Werth , S , Ovaskainen , O , Varkonyi , G , Scheidegger , C & Snall , T 2017 , ' Discovery of long-distance gamete dispersal in a lichen-forming ascomycete ' , New Phytologist , vol. 216 , no. 1 , pp. 216-226 . https://doi.org/10.1111/nph.14714

Title: Discovery of long-distance gamete dispersal in a lichen-forming ascomycete
Author: Ronnas, Cecilia; Werth, Silke; Ovaskainen, Otso; Varkonyi, Gergely; Scheidegger, Christoph; Snall, Tord
Contributor: University of Helsinki, Biosciences
University of Helsinki, Swedish University of Agricultural Sciences
Date: 2017-10
Language: eng
Number of pages: 11
Belongs to series: New Phytologist
ISSN: 0028-646X
URI: http://hdl.handle.net/10138/223787
Abstract: Accurate estimates of gamete and offspring dispersal range are required for the understanding and prediction of spatial population dynamics and species persistence. Little is known about gamete dispersal in fungi, especially in lichen-forming ascomycetes. Here, we estimate the dispersal functions of clonal propagules, gametes and ascospores of the epiphytic lichen Lobaria pulmonaria. We use hierarchical Bayesian parentage analysis, which integrates genetic and ecological information from multiannual colonization and dispersal source data collected in a large, oldgrowth forest landscape. The effective dispersal range of gametes is several hundred metres to kilometres from potential paternal individuals. By contrast, clonal propagules disperse only tens of metres, and ascospores disperse over several thousand metres. Our study reveals the dispersal distances of individual reproductive units; clonal propagules, gametes and ascospores, which is of great importance for a thorough understanding of the spatial dynamics of ascomycetes. Sexual reproduction occurs between distant individuals. However, whereas gametes and ascospores disperse over long distances, the overall rate of colonization of trees is low. Hence, establishment is the limiting factor for the colonization of new host trees by the lichen in old- growth landscapes.
Subject: asexual
clonal
dispersal
gamete
lichen
long distance
sexual
short distance
FUNGUS LOBARIA-PULMONARIA
GENETIC-STRUCTURE
EPIPHYTIC LICHEN
POPULATION-GENETICS
METAPOPULATION DYNAMICS
DALDINIA-LOCULATA
NEUROSPORA-CRASSA
FOREST LANDSCAPE
SEED DISPERSAL
MATING SYSTEMS
1183 Plant biology, microbiology, virology
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