Phylogenetic distribution of roseobacticides in the Roseobacter group and their effect on microalgae.

Autor: Sonnenschein EC; Department of Biotechnology and Biomedicine, Technical University of Denmark, Anker Engelundsvej 301, DK-2800 Kgs, Lyngby, Denmark., Phippen CBW; Department of Biotechnology and Biomedicine, Technical University of Denmark, Anker Engelundsvej 301, DK-2800 Kgs, Lyngby, Denmark., Bentzon-Tilia M; Department of Biotechnology and Biomedicine, Technical University of Denmark, Anker Engelundsvej 301, DK-2800 Kgs, Lyngby, Denmark., Rasmussen SA; Department of Biotechnology and Biomedicine, Technical University of Denmark, Anker Engelundsvej 301, DK-2800 Kgs, Lyngby, Denmark., Nielsen KF; Department of Biotechnology and Biomedicine, Technical University of Denmark, Anker Engelundsvej 301, DK-2800 Kgs, Lyngby, Denmark., Gram L; Department of Biotechnology and Biomedicine, Technical University of Denmark, Anker Engelundsvej 301, DK-2800 Kgs, Lyngby, Denmark.
Jazyk: angličtina
Zdroj: Environmental microbiology reports [Environ Microbiol Rep] 2018 Jun; Vol. 10 (3), pp. 383-393. Date of Electronic Publication: 2018 Apr 23.
DOI: 10.1111/1758-2229.12649
Abstrakt: The Roseobacter-group species Phaeobacter inhibens produces the antibacterial tropodithietic acid (TDA) and the algaecidal roseobacticides with both compound classes sharing part of the same biosynthetic pathway. The purpose of this study was to investigate the production of roseobacticides more broadly in TDA-producing roseobacters and to compare the effect of producers and non-producers on microalgae. Of 33 roseobacters analyzed, roseobacticide production was a unique feature of TDA-producing P. inhibens, P. gallaeciensis and P. piscinae strains. One TDA-producing Phaeobacter, 27-4, did not produce roseobacticides, possibly due to a transposable element. TDA-producing Ruegeria and Pseudovibrio did not produce roseobacticides. Addition of roseobacticide-containing bacterial extracts affected the growth of the microalgae Rhodomonas salina, Thalassiosira pseudonana and Emiliania huxleyi, while growth of Tetraselmis suecica was unaffected. During co-cultivation, growth of E. huxleyi was initially stimulated by the roseobacticide producer DSM 17395, while the subsequent decline in algal cell numbers during senescence was enhanced. Strain 27-4 that does not produce roseobacticides had no effect on algal growth. Both bacterial strains, DSM 17395 and 27-4, grew during co-cultivation presumably utilizing algal exudates. Furthermore, TDA-producing roseobacters have potential as probiotics in marine larviculture and it is promising that the live feed Tetraselmis was unaffected by roseobacticides-containing extracts.
(© 2018 Society for Applied Microbiology and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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