Universität zu Köln

Munoz-Gomez, Sergio A. ORCID: 0000-0002-6200-474X, Kreutz, Martin and Hess, Sebastian (2021). A microbial eukaryote with a unique combination of purple bacteria and green algae as endosymbionts. Sci. Adv., 7 (24). WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE. ISSN 2375-2548

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Abstract

Oxygenic photosynthesizers (cyanobacteria and eukaryotic algae) have repeatedly become endosymbionts throughout evolution. In contrast, anoxygenic photosynthesizers (e.g., purple bacteria) are exceedingly rare as intracellular symbionts. Here, we report on the morphology, ultrastructure, lifestyle, and metagenome of the only purple-green eukaryote known. The ciliate Pseudoblepharisma tenue harbors green algae and hundreds of genetically reduced purple bacteria. The latter represent a new candidate species of the Chromatiaceae that lost known genes for sulfur dissimilation. The tripartite consortium is physiologically complex because of the versatile energy metabolism of each partner but appears to be ecologically specialized as it prefers hypoxic sediments. The emergent niche of this complex symbiosis is predicted to be a partial overlap of each partners' niches and may be largely defined by anoxygenic photosynthesis and possibly phagotrophy. This purple-green ciliate thus represents an extraordinary example of how symbiosis merges disparate physiologies and allows emergent consortia to create novel ecological niches.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Munoz-Gomez, Sergio A. UNSPECIFIED orcid.org/0000-0002-6200-474X UNSPECIFIED Kreutz, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Hess, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-589129
DOI:	10.1126/sciadv.abg4102
Journal or Publication Title:	Sci. Adv.
Volume:	7
Number:	24
Date:	2021
Publisher:	AMER ASSOC ADVANCEMENT SCIENCE
Place of Publication:	WASHINGTON
ISSN:	2375-2548
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ANAEROBIC ENERGY-METABOLISM; GENOME; PARAMECIUM; CHLORELLA; ALIGNMENT; SEQUENCE; ORIGIN; PHOTOTROPHY; SYSTEMATICS; DIVERSITY Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58912