« Previous AbstractMorpho-Physiological Responses and Secondary Metabolites Modulation by Preharvest Factors of Three Hydroponically Grown Genovese Basil Cultivars    Next AbstractAssociated Bacteria Affect Sexual Reproduction by Altering Gene Expression and Metabolic Processes in a Biofilm Inhabiting Diatom »

FEMS Microbiol Ecol

Title:		Biofilm interactions-bacteria modulate sexual reproduction success of the diatom Seminavis robusta
Author(s):		Cirri E; Vyverman W; Pohnert G;
Address:		"Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, D-07743 Jena, Germany. Protistology and Aquatic Ecology, Department of Biology, University of Gent, B-9000 Gent, Belgium"
Journal Title:		FEMS Microbiol Ecol
Year:		2018
Volume:		94
Issue:		11
Page Number:		-
DOI:		10.1093/femsec/fiy161
ISSN/ISBN:		1574-6941 (Electronic) 0168-6496 (Linking)
Abstract:		"Marine biofilms are complex multi-species communities where chemical signaling regulates a substantial share of interactions. The involved natural products represent targets for competition strategies by signal interference. Diatoms, that often dominate biofilms, rely on a complex pheromone system during sexual reproduction, involving synchronizing and attracting metabolites. The present study addresses the effect of bacteria on sexual reproduction of the model pennate diatom Seminavis robusta. We observe that sexual reproduction is most efficient under axenic conditions. Bacteria isolated from field collected biofilms modulate sexual reproduction in the algae. A species-specific effect on the diatom mating efficiency could be observed, with Maribactersp. and Marinobactersp. significantly reducing the sexual reproduction rate. Spent medium from these bacteria has the same effect, demonstrating that chemically mediated cross kingdom interactions take place. In contrast, proportion of auxospores. We further observed a lower concentration of the diatom attraction pheromone diproline in the presence of bacteria compared to axenic conditions. In agreement, the Seminavis-associated bacterial community as well as isolated bacterial strains degraded the pheromone over time. Our results highlight that the pheromone system of diatoms is subject to interference strategies of the associated bacterial community by modulation of the signal landscape"
Keywords:		Bacteria/metabolism *Bacterial Physiological Phenomena *Biofilms Diatoms/metabolism/*physiology Pheromones/metabolism Reproduction Species Specificity;
Notes:		"MedlineCirri, Emilio Vyverman, Wim Pohnert, Georg eng Research Support, Non-U.S. Gov't England 2018/08/21 FEMS Microbiol Ecol. 2018 Nov 1; 94(11). doi: 10.1093/femsec/fiy161"