Cophylogenetic patterns in algal symbionts correlate with repeated symbiont switches during diversification and geographic expansion of lichen-forming fungi in the genus Sticta (Ascomycota, Peltigeraceae)

Lindgren, Hanna; Moncada, Bibiana; Lücking, Robert; Magain, Nicolas; Simon, Antoine; Goffinet, Bernard; Sérusiaux, Emmanuël; Nelsen, Matthew P.; Mercado‐Díaz, Joel A.; Widhelm, Todd J.; Lumbsch, H. Thorsten

doi:10.1016/j.ympev.2020.106860

Cited by 19 publications

(22 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fruticose lichen genus Stereocaulon may harbour thallus photobionts of either Asterochloris, Vulcanochloris or Chloroidium (Vančurová et al 2018). Species of Sticta may partner with chlorobionts of Symbiochloris, Coccomyxa, Elliptochloris, Heveochlorella or Chloroidium (Lindgren et al 2020). Squamulose Psora decipiens is reported to partner with either Asterochloris, Trebouxia, Chloroidium (Ruprecht et al 2014) or Myrmecia photobionts (Williams et al 2017;Moya et al 2018).…”

Section: Patterns Of Symbiont Pairingmentioning

confidence: 99%

“…Soon thereafter, the 'trebouxioid' photobionts associated with foliicolous Gomphillaceae and Pilocarpaceae were also attributed to this genus (Sanders et al 2016). More recently, a study of Sticta lichens worldwide reported Heveochlorella to be the photobiont of numerous specimens from New Zealand and Indian Ocean islands, including six identified species and many undetermined collections (Lindgren et al 2020). In the opinion of Darienko & Pröschold (2019), the algae encompassed by Jaagichlorella, though distributed worldwide, are rare taxa.…”

Section: Elliptochloris Tschermak-woess -Like Its Sister Genusmentioning

confidence: 99%

See 1 more Smart Citation

Lichen algae: the photosynthetic partners in lichen symbioses

Sanders

Masumoto

2021

The Lichenologist

View full text Add to dashboard Cite

A review of algal (including cyanobacterial) symbionts associated with lichen-forming fungi is presented. General aspects of their biology relevant to lichen symbioses are summarized. The genera of algae currently believed to include lichen symbionts are outlined; approximately 50 can be recognized at present. References reporting algal taxa in lichen symbiosis are tabulated, with emphasis on those published since the 1988 review by Tschermak-Woess, and particularly those providing molecular evidence for their identifications. This review is dedicated in honour of Austrian phycologist Elisabeth Tschermak-Woess (1917–2001), for her numerous and significant contributions to our knowledge of lichen algae (some published under the names Elisabeth Tschermak and Liesl Tschermak).

show abstract

Section: Patterns Of Symbiont Pairingmentioning

confidence: 99%

Section: Elliptochloris Tschermak-woess -Like Its Sister Genusmentioning

confidence: 99%

Lichen algae: the photosynthetic partners in lichen symbioses

Sanders

Masumoto

2021

The Lichenologist

View full text Add to dashboard Cite

show abstract

“…Scale bars, 1 cm in (A); 0.5 mm in (B); 5 mm in (C,E,F); 0.1 mm in (D); and 50 µm in (G). Lindgren et al, 2020). During dispersal, the symbiotic partners can either disperse together within symbiotic propagules (Figure 1B) (vertical transmission), or the symbionts reproduce separately; for example, the mycobionts may produce ascospores in apothecia (Figure 1F) and re-establish the symbiotic association after dispersal (horizontal transmission).…”

Section: Introductionmentioning

confidence: 99%

“…A certain degree of symbiont specificity is a prerequisite for long-lasting symbiotic relationships. Within Lecanoromycetes (Ascomycota), the largest class of lichen-symbiotic fungi, most mycobionts seem to be highly specific in their choice of photobionts ( Dahlkild et al, 2001 ; Otálora et al, 2010 ; Dal Grande et al, 2014 ; Nyati et al, 2014 ; Leavitt et al, 2015 ; Chagnon et al, 2018 ; Jüriado et al, 2019 ; Dal Forno et al, 2020 ; Lindgren et al, 2020 ). During dispersal, the symbiotic partners can either disperse together within symbiotic propagules ( Figure 1B ) (vertical transmission), or the symbionts reproduce separately; for example, the mycobionts may produce ascospores in apothecia ( Figure 1F ) and re-establish the symbiotic association after dispersal (horizontal transmission).…”

Section: Introductionmentioning

confidence: 99%

Complex Interaction Networks Among Cyanolichens of a Tropical Biodiversity Hotspot

et al. 2021

View full text Add to dashboard Cite

Interactions within lichen communities include, in addition to close mutualistic associations between the main partners of specific lichen symbioses, also more elusive relationships between members of a wider symbiotic community. Here, we analyze association patterns of cyanolichen symbionts in the tropical montane forests of Taita Hills, southern Kenya, which is part of the Eastern Afromontane biodiversity hotspot. The cyanolichen specimens analyzed represent 74 mycobiont taxa within the order Peltigerales (Ascomycota), associating with 115 different variants of the photobionts genus Nostoc (Cyanobacteria). Our analysis demonstrates wide sharing of photobionts and reveals the presence of several photobiont-mediated lichen guilds. Over half of all mycobionts share photobionts with other fungal species, often from different genera or even families, while some others are strict specialists and exclusively associate with a single photobiont variant. The most extensive symbiont network involves 24 different fungal species from five genera associating with 38 Nostoc photobionts. The Nostoc photobionts belong to two main groups, the Nephroma-type Nostoc and the Collema/Peltigera-type Nostoc, and nearly all mycobionts associate only with variants of one group. Among the mycobionts, species that produce cephalodia and those without symbiotic propagules tend to be most promiscuous in photobiont choice. The extent of photobiont sharing and the structure of interaction networks differ dramatically between the two major photobiont-mediated guilds, being both more prevalent and nested among Nephroma guild fungi and more compartmentalized among Peltigera guild fungi. This presumably reflects differences in the ecological characteristics and/or requirements of the two main groups of photobionts. The same two groups of Nostoc have previously been identified from many lichens in various lichen-rich ecosystems in different parts of the world, indicating that photobiont sharing between fungal species is an integral part of lichen ecology globally. In many cases, symbiotically dispersing lichens can facilitate the dispersal of sexually reproducing species, promoting establishment and adaptation into new and marginal habitats and thus driving evolutionary diversification.

show abstract

“…Subsequent studies (e.g. Lindgren et al., 2020; Nelsen & Gargas, 2008; Piercey‐Normore, 2006; Zoller & Lutzoni, 2003) also found evidence for photobiont switching and sharing among mycobionts in various groups of lichens, but all indicated absence of strict co‐speciation. Therefore, although nearly 20,000 species of lichen‐forming fungi are known (Lücking et al., 2017), there appear to be far fewer species of photobionts, by around one to two orders of magnitude (Ahmadjian, 1967; Hill, 2009; Kroken & Taylor, 2000; Tschermak‐Woess, 1988).…”

Section: Introductionmentioning

confidence: 95%

Extensive photobiont sharing in a rapidly radiating cyanolichen clade

et al. 2020

Self Cite

View full text Add to dashboard Cite

Recent studies have uncovered remarkable diversity in Dictyonema s.lat. basidiolichens, here recognized as subtribe Dictyonemateae. This group includes five genera and 148 species, but hundreds more await description. The photobionts of these lichens belong to Rhizonema, a recently resurrected cyanobacterial genus known by a single species. To further investigate photobiont diversity within Dictyonemateae, we generated 765 new cyanobacterial sequences from 635 specimens collected from 18 countries. The ITS barcoding locus supported the recognition of 200 mycobiont (fungal) species among these samples, but the photobiont diversity was comparatively low. Our analyses revealed three main divisions of Rhizonema, with two repeatedly recovered as monophyletic (proposed as new species), and the third mostly paraphyletic. The paraphyletic lineage corresponds to R. interruptum and partnered with mycobionts from all five genera in Dictyonemateae. There was no evidence of photobiont‐mycobiont co‐speciation, but one of the monophyletic lineages of Rhizonema appears to partner predominantly with one of the two major clades of Cora (mycobiont) with samples collected largely from the northern Andes. Molecular clock estimations indicate the Rhizonema species are much older than the fungal species in the Dictyonemateae, suggesting that these basidiolichens obtained their photobionts from older ascolichen lineages and the photobiont variation in extant lineages of Dictyonemateae is the result of multiple photobiont switches. These results support the hypothesis of lichens representing "fungal farmers," in which diverse mycobiont lineages associate with a substantially lower diversity of photobionts by sharing those photobionts best suited for the lichen symbiosis among multiple and often unrelated mycobiont lineages.

show abstract

Cophylogenetic patterns in algal symbionts correlate with repeated symbiont switches during diversification and geographic expansion of lichen-forming fungi in the genus Sticta (Ascomycota, Peltigeraceae)

Abstract: patterns in algal symbionts correlate with repeated symbiont switches during diversification and geographic expansion of lichen-forming fungi in the genus Sticta (Ascomycota: Peltigeraceae), Molecular Phylogenetics and Evolution (2020), doi:

Cited by 19 publications

References 85 publications

Lichen algae: the photosynthetic partners in lichen symbioses

Lichen algae: the photosynthetic partners in lichen symbioses

Complex Interaction Networks Among Cyanolichens of a Tropical Biodiversity Hotspot

Extensive photobiont sharing in a rapidly radiating cyanolichen clade

Contact Info

Product

Resources

About