Planktonic bacteria and fungi are selectively eliminated by exposure to marine macroalgae in close proximity

FEMS Microbiology Ecology
C LamT Harder

Abstract

To test whether macroalgae affect microbial colonizers in close proximity in a phylum-specific fashion, the community richness of planktonic bacteria and fungi was analyzed with selective oligonucleotide probes targeting the Cytophaga/Flavobacterium/Bacteroides (CFB), Alphaproteobacteria and Roseobacter group and the ITS1 region of marine fungi. Naturally occuring planktonic microorganisms were incubated in the presence of macroalgae or in seawater previously conditioned with macroalgal metabolites. The red algae Ceramium rubrum and Mastocarpus stellatus as well as seawater conditioned with these algae reduced the community composition of bacteria to a greater extent than the brown alga Laminaria digitata, indicating that metabolites differed among macroalgae or that the susceptibility of planktonic bacteria towards alga-derived antimicrobials correlated with their phylogenetic affiliation. The most affected phylotypes belonged to the CFB and the Roseobacter clade. The planktonic fungal community was only affected in the presence of macroalgae and not in algal-conditioned water, but with a specificity different from that observed for bacteria. The macroalgae L. digitata and M. stellatus exhibited more pronounced antifungal effe...Continue Reading

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Citations

May 8, 2009·The ISME Journal·Jeffrey W TurnerErin K Lipp
Oct 12, 2013·Environmental Microbiology·Suhelen EganTorsten Thomas
Nov 20, 2012·FEMS Microbiology Reviews·Suhelen EganTorsten Thomas
Jul 11, 2012·FEMS Microbiology Ecology·Joke HollantsAnne Willems
Jun 19, 2017·Microbial Ecology·Sergio A Coelho-SouzaRicardo Coutinho
Jan 10, 2018·Frontiers in Microbiology·July Z FlorezAlejandro H Buschmann
Sep 14, 2012·Bioscience, Biotechnology, and Biochemistry·Ji Young Cho
Oct 17, 2020·The Journal of Eukaryotic Microbiology·Bianca Trevizan SegoviaLaura Wegener Parfrey

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