Ulla Kaasalainen

Publications29
h-index13
Citations484
Highly Influential Citations32
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Cyanobacteria produce a high variety of hepatotoxic peptides in lichen symbiosis
TLDR
The results demonstrate that the production of cyanobacterial hepatotoxins inLichen symbiosis is a global phenomenon and occurs in many different lichen lineages, and the very high genetic diversity of the mcyE gene and the chemical diversity of microcystins suggest that lichen symbioses may have been an important environment for diversification of these cyanobacteria.
Diversity and ecological adaptations in Palaeogene lichens
TLDR
The fossil lichens show a wide diversity of morphological adaptations that attached epiphytic thalli to their substrates, helped to combine external water storage with effective gas exchange and facilitated the simultaneous reproduction and dispersal of both partners in symbiosis.
Microcystin production in the tripartite cyanolichen Peltigera leucophlebia.
TLDR
This finding is the first direct evidence of in situ production of microcystins in lichens or plant-cyanobacterial symbioses and may explain why cyanolichens and symbiotic bryophytes are not among the preferred food sources of most animal grazers.
Convergent evolution of [D-Leucine1] microcystin-LR in taxonomically disparate cyanobacteria
TLDR
The results suggest that the replacement of entire adenylation domains could be a more successful strategy to obtain higher specificity in the modification of the non-ribosomal peptides than point mutations.
Genotype variability of Nostoc symbionts associated with three epiphytic Nephroma species in a boreal forest landscape
TLDR
It is shown that mycobionts of the diverse Nephroma guild do not exchange their cyanobacterial photobiotic symbionts at random, and that reproductive strategy is reflected in species photobiont choice.
Lichen species identity and diversity of cyanobacterial toxins in symbiosis.
A Caribbean epiphyte community preserved in Miocene Dominican amber
TLDR
An in situ preserved corticolous community from a piece of Miocene Dominican amber which is composed of a lichen, a moss and three species of leafy liverworts is reported, substantiating the notion of a stasis in morphotype diversity, but a certain turnover of species, in the Caribbean since the early Miocene.
Geographic mosaic of symbiont selectivity in a genus of epiphytic cyanolichens
TLDR
The results show that all bipartite Nephroma species associate with one group of Nostoc different from Nostoc typically found in tripartite Nephrom species, supporting the concept of functional lichen guilds.
Relationships between mycobiont identity, photobiont specificity and ecological preferences in the lichen genus Peltigera (Ascomycota) in Estonia (northeastern Europe)
Specialist taxa restricted to threatened habitats contribute significantly to the regional diversity of Peltigera (Lecanoromycetes, Ascomycota) in Estonia
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