Opin vísindi

Distinctive characters of Nostoc genomes in cyanolichens

Distinctive characters of Nostoc genomes in cyanolichens

Titill: Distinctive characters of Nostoc genomes in cyanolichens
Höfundur: Gagunashvili, Andrey   orcid.org/0000-0003-4012-0886
Andrésson, Ólafur   orcid.org/0000-0002-8451-5671
Útgáfa: 2018-06-05
Tungumál: Enska
Umfang: 434
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Líf- og umhverfisvísindadeild (HÍ)
Faculty of Life and Environmental Sciences (UI)
Birtist í: BMC Genomics;19(1)
ISSN: 1471-2164
DOI: 10.1186/s12864-018-4743-5
Efnisorð: Cyanobacteria; Nostoc; Lichen; Symbiosis; Symbiotic competence; Gerlar; Samlífi; Fléttur (plöntur)
URI: https://hdl.handle.net/20.500.11815/924

Skoða fulla færslu


Gagunashvili, A. N., & Andrésson, Ó. S. (2018). Distinctive characters of Nostoc genomes in cyanolichens. BMC Genomics, 19(1), 434. doi:10.1186/s12864-018-4743-5


Background Cyanobacteria of the genus Nostoc are capable of forming symbioses with a wide range of organism, including a diverse assemblage of cyanolichens. Only certain lineages of Nostoc appear to be able to form a close, stable symbiosis, raising the question whether symbiotic competence is determined by specific sets of genes and functionalities. Results We present the complete genome sequencing, annotation and analysis of two lichen Nostoc strains. Comparison with other Nostoc genomes allowed identification of genes potentially involved in symbioses with a broad range of partners including lichen mycobionts. The presence of additional genes necessary for symbiotic competence is likely reflected in larger genome sizes of symbiotic Nostoc strains. Some of the identified genes are presumably involved in the initial recognition and establishment of the symbiotic association, while others may confer advantage to cyanobionts during cohabitation with a mycobiont in the lichen symbiosis. Conclusions Our study presents the first genome sequencing and genome-scale analysis of lichen-associated Nostoc strains. These data provide insight into the molecular nature of the cyanolichen symbiosis and pinpoint candidate genes for further studies aimed at deciphering the genetic mechanisms behind the symbiotic competence of Nostoc. Since many phylogenetic studies have shown that Nostoc is a polyphyletic group that includes several lineages, this work also provides an improved molecular basis for demarcation of a Nostoc clade with symbiotic competence.


Publisher's version (útgefin grein)


This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.


Þetta verk birtist í eftirfarandi safni/söfnum: