Cyanobacteria in terrestrial symbiotic systems

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http://hdl.handle.net/10138/309574

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Rikkinen , J 2017 , Cyanobacteria in terrestrial symbiotic systems . in P Hallenbeck (ed.) , Modern topics in the Phototrophic Prokaryotes : Environmental and Applied Aspects . Springer International Publishing AG , London , pp. 243-294 . https://doi.org/10.1007/978-3-319-46261-5

Title: Cyanobacteria in terrestrial symbiotic systems
Author: Rikkinen, Jouko
Editor: Hallenbeck, Patrick
Contributor: University of Helsinki, Lichens
Publisher: Springer International Publishing AG
Date: 2017-04
Language: eng
Number of pages: 51
Belongs to series: Modern topics in the Phototrophic Prokaryotes Environmental and Applied Aspects
ISBN: 978-3-319-46259-2
978-3-319-46261-5
URI: http://hdl.handle.net/10138/309574
Abstract: Filamentous cyanobacteria are important primary producers and N2 fixers in many terrestrial environments. As reduced nitrogen is often limiting, some thalloid liverworts (Marchantiophyta), hornworts (Anthocerophyta), the water fern Azolla (Salviniales), cycads (Cycadophyta), and the angiosperm Gunnera (Gunnerales) have evolved the ability to establish stable and structurally well-defined symbioses with N2-fixing cyanobacteria. Also a wide diversity of lichen-forming fungi have cyanobacteria as photosynthetic symbionts or as N2-fixing symbionts. Cyanolichen symbioses have evolved independently in different fungal lineages, and evolution has often resulted in convergent morphologies in distantly related groups. DNA techniques have provided a wealth of new information on the diversity of symbiotic cyanobacteria and their hosts. The fact that many plants and fungi engage in many different symbioses simultaneously underlines the probable significance of diffuse evolutionary relationships between different symbiotic systems, including cyanobacterial and mycorrhizal associations. This review introduces the reader to recent research on symbiotic cyanobacteria in terrestrial ecosystems and shortly describes the astonishing range of diversity in these ecologically important associations.
Subject: 118 Biological sciences
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