Photobiont switching causes changes in the reproduction strategy and phenotypic dimorphism in the Arthoniomycetes

Damien Ertz , Beata Guzow-Krzemińska , Göran Thor , Anna Łubek , Martin Kukwa

Abstract

Phylogenetic analyses using mtSSU and nuITS sequences of Buellia violaceofusca (previously placed in Lecanoromycetes ), a sterile, sorediate lichen having a trebouxioid photobiont, surprisingly prove that the species is conspecific with Lecanographa amylacea ( Arthoniomycetes ), a fertile, esorediate species with a trentepohlioid photobiont. These results suggest that L . amylacea and B . violaceofusca are photomorphs of the same mycobiont species, which, depending on the photobiont type, changes the morphology and the reproduction strategy. This is the first example of a lichenized fungus that can select between Trebouxia ( Trebouxiophyceae ) and trentepohlioid ( Ulvophyceae ) photobionts. Trebouxia photobionts from the sorediate morphotype belong to at least three different phylogenetic clades, and the results suggest that Lecanographa amylacea can capture the photobiont of other lichens such as Chrysothrix candelaris to form the sorediate morphotype. Phylogenetic analyses based on rbcL DNA data suggest that the trentepohlioid photobiont of L . amylacea is closely related to Trentepohlia isolated from fruticose lichens. The flexibility in the photobiont choice enables L . amylacea to use a larger range of tree hosts. This strategy helps the lichen to withstand changes of environmental conditions, to widen its distribution range and to increase its population size, which is particularly important for the survival of this rare species.
Author Damien Ertz
Damien Ertz,,
-
, Beata Guzow-Krzemińska (FB / DPTNC)
Beata Guzow-Krzemińska,,
- Department of Plant Taxonomy and Nature Conservation
, Göran Thor
Göran Thor,,
-
, Anna Łubek
Anna Łubek,,
-
, Martin Kukwa (FB / DPTNC)
Martin Kukwa,,
- Department of Plant Taxonomy and Nature Conservation
Journal seriesScientific Reports, ISSN 2045-2322, (A 40 pkt)
Issue year2018
Vol8
Pages1-14
Publication size in sheets0.65
DOIDOI:10.1038/s41598-018-23219-3
URL https://www.nature.com/articles/s41598-018-23219-3
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)40
ScoreMinisterial score = 40.0, 03-04-2018, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 03-04-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 4.259 (2) - 2016=4.847 (5)
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