Phylogenetic Species, Reproductive Mode, and Specificity of the Green Alga<i>Trebouxia</i>Forming Lichens with the Fungal Genus<i>Letharia</i>

Kroken, Scott; Taylor, John W.

doi:10.1639/0007-2745(2000)103[0645:psrmas]2.0.co;2

Cited by 210 publications

(270 citation statements)

References 31 publications

Supporting

Mentioning

262

Contrasting

Order By: Relevance

“…Trebouxia italiana, the last described species of Asterochloris, with no published sequence, has a very different chloroplast morphology and cell dimensions compared to both investigated strains (Gärtner 1985). These results indicate the presence of obvious cryptic species diversity in Asterochloris, as has been recently shown in other trebouxiophycean clades (Kroken & Taylor 2000;Neustupa et al 2007).…”

Section: Discussionsupporting

confidence: 85%

Comparative study of chloroplast morphology and ontogeny in Asterochloris (Trebouxiophyceae, Chlorophyta)

Škaloud

Peksa

2008

Biologia

View full text Add to dashboard Cite

Confocal laser scanning microscopy was utilized to compare the chloroplast morphology and ontogeny among five strains of the green alga Asterochloris. Parsimony analysis inferred from the rDNA ITS sequences confirmed their placement in three distinct lineages: Asterochloris phycobiontica, Trebouxia pyriformis and Asterochloris sp. Examination by confocal microscopy revealed the existence of interspecific differences in the chloroplast ontogeny of Asterochloris; this was based upon either specific chloroplast structures observed in a single species, or on the differential timing of particular ontogenetic sequences. The occurrence of flat parietal chloroplasts prior to cell division, considered as a basic morphological discriminative character of Asterochloris, was clearly associated with the process of aplanosporogenesis. By contrast, chloroplast transformation prior to the formation of autospores proceeded simply by the multiple fission of the chloroplast matrix in the cell lumen.

show abstract

Section: Discussionsupporting

confidence: 85%

Comparative study of chloroplast morphology and ontogeny in Asterochloris (Trebouxiophyceae, Chlorophyta)

Škaloud

Peksa

2008

Biologia

View full text Add to dashboard Cite

show abstract

“…orders of fungi are often restricted to a single photobiont genus), green algal photobiont genera commonly associate with unrelated lineages of fungi (Rambold et al, 1998;Piercey-Normore & DePriest, 2001) and sharing of photobiont genotypes among related species is common (Kroken & Taylor, 2000;Helms et al, 2001;Yahr et al, 2004). Our findings that, with the exception of the Nephromataceae/ Lobariaceae photobiont lineage, host specialization is low for the genus Nostoc indicate that patterns are similar for cyanolichens and suggest that opportunities for coevolution may be low in these symbioses.…”

Section: Discussionmentioning

confidence: 73%

Assessing host specialization in symbiotic cyanobacteria associated with four closely related species of the lichen fungusPeltigera

O’Brien

Miądlikowska

Lutzoni

2005

European Journal of Phycology

109

115

View full text Add to dashboard Cite

Heterocystous cyanobacteria form symbiotic associations with a wide range of plant and fungal hosts. We used a molecular phylogenetic approach to investigate the degree of host specialization of cyanobacteria associated with four closely related species of the lichenized fungus Peltigera, and to compare these strains with other symbiotic cyanobacteria. We conducted phylogenetic analyses on 16S, rbcLX, and trnL sequences from cyanobacteria associated with multiple specimens of each lichen species and from symbionts of other fungi and plants, as well as from free-living strains of Nostoc and related genera of cyanobacteria. The genus Nostoc comprises two divergent lineages, but symbiotic strains occur primarily within a single monophyletic lineage that also includes free-living representatives. Cyanobacteria from the same lichen species were often more closely related to strains from other species or to plant symbionts or free-living strains than to each other. These results indicate that host specialization is low for the genus Nostoc, and suggest that opportunities for coevolution with its partners may be rare.

show abstract

“…To amplify conserved parts of the nuclear genome, symbiont-specific primers can often be designed using even distantly related ascomycete species (Kroken & Taylor 2000, 2001bHögberg et al 2002;Myllys et al 2005). One problem may be that fungalspecific primers may occasionally amplify distantly related fungal taxa, if present in a thallus (e.g.…”

Section: Fungal-specific Pcr-based Markersmentioning

confidence: 99%

Population genetics of lichen-forming fungi – a review

Werth

2010

The Lichenologist

View full text Add to dashboard Cite

Population genetics investigates the distribution of genetic variation in natural populations and the genetic differentiation among populations. Lichen-forming fungi are exciting subjects for population genetic studies due to their obligate symbiosis with a green-algal and/or cyanobacterial photobiont, and because their different reproductive strategies could influence fungal genetic structures in various ways. In this review, first, I briefly summarize the results from studies of chemotype variation in populations of lichen-forming fungi. Second, I compare and evaluate the DNA-based molecular tools available for population genetics of lichen-forming fungi. Third, I review the literature available on the genetic structure of lichen fungi to show general trends. I discuss some fascinating examples, and point out directions for future research.

show abstract

Phylogenetic Species, Reproductive Mode, and Specificity of the Green AlgaTrebouxiaForming Lichens with the Fungal GenusLetharia

Cited by 210 publications

References 31 publications

Comparative study of chloroplast morphology and ontogeny in Asterochloris (Trebouxiophyceae, Chlorophyta)

Comparative study of chloroplast morphology and ontogeny in Asterochloris (Trebouxiophyceae, Chlorophyta)

Assessing host specialization in symbiotic cyanobacteria associated with four closely related species of the lichen fungusPeltigera

Population genetics of lichen-forming fungi – a review

Contact Info

Product

Resources

About