Universität zu Köln

Flues, Sebastian, Bass, David and Bonkowski, Michael ORCID: 0000-0003-2656-1183 (2017). Grazing of leaf-associated Cercomonads (Protists: Rhizaria: Cercozoa) structures bacterial community composition and function. Environ. Microbiol., 19 (8). S. 3297 - 3310. HOBOKEN: WILEY. ISSN 1462-2920

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Abstract

Preferential food selection in protists is well documented, but we still lack basic understanding on how protist predation modifies the taxonomic and functional composition of bacterial communities. We conducted feeding trials using leaf-associated cercomonad Cercozoa by incubating them on a standardized, diverse bacterial community washed from plant leaves. We used a shotgun metagenomics approach to investigate the taxonomic and functional changes of the bacterial community after five days protist predation on bacteria. Predation-induced shifts in bacterial community composition could be linked to phenotypic protist traits. Protist reproduction rate, morphological plasticity and cell speed were most important in determining bacterial community composition. Analyses of co-occurrence patterns showed less complex correlations between bacterial taxa in the protist-grazed treatments with a higher proportion of positive correlations than in non-grazed controls, suggesting that predation reduced the influence of strong competitors. Protist predation influenced 14 metabolic core functions including membrane transport from which type VI secretion systems were in particular upregulated. In view of the functional importance of bacterial communities in the phyllosphere and rhizosphere of plants, a more detailed understanding of predator-prey interactions, changes in microbial composition and function, and subsequent repercussions on plant performance are clearly required.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Flues, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Bass, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Bonkowski, Michael UNSPECIFIED orcid.org/0000-0003-2656-1183 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-223737
DOI:	10.1111/1462-2920.13824
Journal or Publication Title:	Environ. Microbiol.
Volume:	19
Number:	8
Page Range:	S. 3297 - 3310
Date:	2017
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1462-2920
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language VI SECRETION SYSTEM; PLANT-GROWTH; BORNE PATHOGENS; MICROBIAL LOOP; SOIL; PROTOZOA; DIVERSITY; AMEBAS; PHYLLOSPHERE; RHIZOSPHERE Multiple languages Microbiology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22373