Morphology and secondary chemistry in species recognition of Parmelia omphalodes group - evidence from molecular data with notes on the ecological niche modelling and genetic variability of photobionts

Emilia Ossowska , Beata Guzow-Krzemińska , Marta Kolanowska , Katarzyna Szczepańska , Martin Kukwa


To evaluate the importance of morphological and chemical characters used in the recognition of species within the Parmelia omphalodes group, we performed phylogenetic, morphological and chemical analyses of 335 specimens, of which 34 were used for molecular analyses. Phylogenetic analyses, based on ITS rDNA sequences, show that P. pinnatifida is distinct from P. omphalodes and the most important difference between those species is the development of pseudocyphellae. In P. pinnatifida, they are mostly marginal and form white rims along lobes margins, but laminal pseudocyphellae can develop in older parts of thalli and are predominantly connected with marginal pseudocyphellae. In contrast, in P. omphalodes laminal pseudocyphellae are common and are predominantly not connected to marginal pseudocyphellae. Chemical composition of secondary lichen metabolites in both analysed species is identical and therefore this feature is not diagnostic in species recognition. Few samples of P. discordans, species morphologically similar to P. omphalodes and P. pinnatifida, were also included in the analyses and they are nested within the clade of P. omphalodes, despite the different chemistry (protocetraric acid present versus salazinic acid in P. omphalodes). All taxa of the P. omphalodes group occupy similar niches, but their potential distributions are wider than those currently known. The absence of specimens in some localities may be limited by the photobiont availability. Parmelia omphalodes and P. pinnatifida are moderately selective in photobiont choice as they form associations with at least two or three lineages of Trebouxia clade S. Parmelia pinnatifida, as well as P. discordans are associated with Trebouxia OTU S02 which seems to have a broad ecological amplitude. Other lineages of Trebouxia seem to be rarer, especially Trebouxia sp. OTU S04, which is sometimes present in P. pinnatifida. This study indicates the importance of extensive research including morphology, chemistry and analysis of molecular markers of both bionts in taxonomical studies of lichens.
Author Emilia Ossowska (FB/DPTNC)
Emilia Ossowska,,
- Department of Plant Taxonomy and Nature Conservation
, Beata Guzow-Krzemińska (FB/DPTNC)
Beata Guzow-Krzemińska,,
- Department of Plant Taxonomy and Nature Conservation
, Marta Kolanowska (FB/DPTNC)
Marta Kolanowska,,
- Department of Plant Taxonomy and Nature Conservation
, Katarzyna Szczepańska
Katarzyna Szczepańska,,
, Martin Kukwa (FB/DPTNC)
Martin Kukwa,,
- Department of Plant Taxonomy and Nature Conservation
Journal seriesMycoKeys, ISSN 1314-4057, e-ISSN 1314-4049, (N/A 100 pkt)
Issue year2019
Publication size in sheets1.75
Keywords in EnglishAscomycota, Parmeliaceae, parmelioid lichens, ITS rDNA, secondary metabolites, morphology, photobiont, ecological niche modelling
ASJC Classification1105 Ecology, Evolution, Behavior and Systematics; 1110 Plant Science
Languageen angielski
LicenseRepository; published final; Uznanie Autorstwa (CC-BY); with publication
Ossowska_Emilia_Morphology_and_secondary_chemistry_2019.pdf Ossowska_Emilia_Morphology_and_secondary_chemistry_2019.pdf 5,76 MB
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 25-02-2020, ArticleFromJournal
Publication indicators WoS Citations = 0.000; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.290; WoS Impact Factor: 2018 = 2.435 (2) - 2018=2.870 (5)
Citation count*1 (2020-06-23)
Additional fields
LicencjaUtwór jest udostępniany na licencji Creative Commons Uznanie autorstwa 4.0 Międzynarodowe (CC BY 4.0)
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