Genetic diversity in cyanobacterial symbionts of thalloid bryophytes.
@article{Rikkinen2008GeneticDI,
title={Genetic diversity in cyanobacterial symbionts of thalloid bryophytes.},
author={Jouko Rikkinen and Viivi Virtanen},
journal={Journal of experimental botany},
year={2008},
volume={59 5},
pages={
1013-21
}
}Two species of thalloid liverworts, Blasia pusilla and Cavicularia densa, form stable symbioses with nitrogen-fixing cyanobacteria. Both bryophytes promote the persistence of their cyanobacterial associations by producing specialized gemmae, which facilitate the simultaneous dispersal of the host and its nitrogen-fixing symbionts. Here the genetic diversity of cyanobacterial symbionts of Blasia and Cavicularia is examined. The results indicate that the primary symbionts of both bryophytes are…
27 Citations
Molecular studies on cyanobacterial diversity in lichen symbioses
- Environmental Science, Biology
- 2013
From the late 1990s cyanobacterial lichens have been the subject of a steadily increasing number of molecular investigations and a chronological review examines how these studies have contributed to present knowledge and highlights some conceptual developments that have been instrumental in the process.
Cyanobacteria in Terrestrial Symbiotic Systems
- Environmental Science
- 2017
The reader is introduced to recent research on symbiotic cyanobacteria in terrestrial ecosystems and the astonishing range of diversity in these ecologically important associations is described.
Comparative genomic insights into culturable symbiotic cyanobacteria from the water fern Azolla
- Biology, EngineeringMicrobial genomics
- 2021
Ten cyanobacterial strains isolated from Azolla form a well-characterized symbiotic association with the non-culturable cyanobacterium Nostoc azollae, which fixes nitrogen for the plant, and some of these strains may be useful in establishing novel symbiotic associations with other plants.
Signalling in Cyanobacteria–Plant Symbioses
- Environmental Science, Biology
- 2012
Cyanobacteria are a morphologically diverse and widespread group of phototrophic bacteria, many of which are capable of nitrogen fixation, which form symbioses with a wide range of eukaryotic hosts including fungi, diatoms, dinoflagellates, sponges, ascidians, corals and plants.
Cyanobacteria and their toxins in lichen symbiosis
- Biology, Environmental Science
- 2012
The results show that hepatotoxic microcystins are produced in situ in lichen symbioses by symbiotic cyanobacteria, and that these compounds are produced quite commonly in many different lichen genera all around the world.
The diversity and community structure of symbiotic cyanobacteria in hornworts inferred from long-read amplicon sequencing.
- Environmental Science, BiologyAmerican journal of botany
- 2021
It is suggested that hornwort cyanobionts have a tight connection to the soil background, and there is no evidence that time within growing season, host species, or distance at the scale of meters strongly govern cyanobacteria community assembly.
Genotype variability of Nostoc symbionts associated with three epiphytic Nephroma species in a boreal forest landscape
- Environmental Science, Biology
- 2011
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.
Contrasting bacteriome of the hornwort Leiosporoceros dussii in two nearby sites with emphasis on the hornwort-cyanobacterial symbiosis
- Environmental Science, BiologySymbiosis
- 2020
This study provides the first hornwort bacteriome and is an important step in the characterization of tropical bryophyte symbioses.
Symbiotic cyanobacteria communities in hornworts across time, space, and host species
- Environmental Science, Biology
- 2020
This study highlights the importance of sampling soil and sympatric species to infer partner compatibility and preference, and marks a critical step toward better understanding the ecology and evolution of plant-cyanobacteria symbiosis.
A case study on the re-establishment of the cyanolichen symbiosis: where do the compatible photobionts come from?
- Biology, Environmental ScienceAnnals of botany
- 2019
BACKGROUND AND AIMS
In order to re-establish lichen symbiosis, fungal spores must first germinate and then associate with a compatible photobiont. To detect possible establishment limitations in a…
References
SHOWING 1-10 OF 59 REFERENCES
High selectivity in symbiotic associations of lichenized ascomycetes and cyanobacteria
- Environmental Science, Biology
- 2006
It is shown that many lichen fungi are strongly selective towards their cyanobionts and that some of the Nostoc taxa may be specialized in symbiotic life with only lichenized ascomycetes.
Assessing host specialization in symbiotic cyanobacteria associated with four closely related species of the lichen fungus Peltigera
- Biology, Environmental Science
- 2005
Investigation of the degree of host specialization of cyanobacteria associated with four closely related species of the lichenized fungus Peltigera indicates that host specialization is low for the genus Nostoc, and suggests that opportunities for coevolution with its partners may be rare.
Lichen Guilds Share Related Cyanobacterial Symbionts
- Biology, Environmental ScienceScience
- 2002
A phylogenetic analysis resulted in a consensus tree in which all Nostoc formed a monophyletic group with 100% support, and the cyanobionts of the Nephroma guild form a well-supported subgroup within the Nostoc clade.
Genetic diversity of green algal and cyanobacterial photobionts in Nephroma (Peltigerales)
- Biology, Environmental ScienceThe Lichenologist
- 2003
Cyanobiont diversity within coralloid roots of selected cycad species
- Environmental Science, Biology
- 1999
The diversity and host specificity of the cyanobionts of several cycad species (Cycas circinalis L., C. rumphii Miq., Encephalartos lebomboensis I. Verd., E. villosus Lem., and Zamia pumila L.)…
Sequence based data supports a single Nostoc strain in individual coralloid roots of cycads.
- Environmental ScienceFEMS microbiology ecology
- 2004
Phenotypic and genotypic comparison of symbiotic and free-living cyanobacteria from a single field site
- Environmental Science, BiologyApplied and environmental microbiology
- 1997
PCR amplification techniques were used to compare cyanobacterial symbionts from a cyanobacterium-bryophyte symbiosis and free-living cyanobacteria from the same field site and confirmed for the first time that a diversity of symbiotic cyanob bacteria infect Phaeoceros in the field.
Ecological and evolutionary role of photobiont-mediated guilds in lichens
- Environmental Science, Biology
- 2003
It is argued that the present diversity of lichen symbionts has evolved within an ecological kaleidoscope of photobiont-mediated guilds.
Species of cyanolichens from Pseudocyphellaria with indistinguishable ITS sequences have different photobionts.
- BiologyThe New phytologist
- 2002
The similarity of the ITS sequences raised the possibility that the cyanobacterial-fungal associations of P. crocata and P. neglecta represent the same species and that their different morphology is influenced by the Cyanobacterial symbiont.
Sequence Variation of the tRNALeuIntron as a Marker for Genetic Diversity and Specificity of Symbiotic Cyanobacteria in Some Lichens
- Biology, Environmental ScienceApplied and Environmental Microbiology
- 1998
The genetic diversity of Nostoc symbiont in situ is not a diverse community of cyanobionts but, rather, one Nostoc strain, indicating that each lichen thallus is colonized only once or that there is a high degree of specificity.




