FN Archimer Export Format PT J TI Complex Relationships between the Blue Pigment Marennine and Marine Bacteria of the Genus Vibrio BT AF Falaise, Charlotte James, Adele Travers, Marie-Agnes Zanella, Marie Badawi, Myriam Mouget, Jean-Luc AS 1:1;2:2,3;3:4;4:1;5:1;6:1; FF 1:;2:PDG-RBE-PFOM;3:PDG-RBE-SGMM-LGPMM;4:;5:;6:; C1 Laboratoire Mer Molécule Santé (EA 2160, FR CNRS 3473 IUML, Le Mans Université, F-72-000 Le Mans, France IFREMER, PDG-RBE-PFOM-LPI, Centre Bretagne, ZI de la Pointe du Diable, CS 10070, F-29280 Plouzané, France Sorbonne Université (UPMC Paris 06, CNRS, UMR 8227), Laboratoire de Biologie Intégrative des Modèles Marins, Station Biologique de Roscoff, F-26680 Roscoff, France IFREMER, PDG-RBE-SG2M-LGPMM, Station de La Tremblade, Ronce Les Bains, F-17390 La Tremblade, France C2 UNIV LE MANS, FRANCE IFREMER, FRANCE UNIV PARIS 06, FRANCE IFREMER, FRANCE SI BREST LA TREMBLADE SE PDG-RBE-PFOM PDG-RBE-SGMM-LGPMM IN WOS Ifremer UPR DOAJ copubli-france copubli-univ-france IF 1.103 TC 13 UR https://archimer.ifremer.fr/doc/00484/59598/62602.pdf https://archimer.ifremer.fr/doc/00484/59598/62604.pdf LA English DT Article DE ;antibacterial activity;diauxie;Haslea;hormesis;marennine;Vibrio AB Marennine, the water-soluble blue pigment produced by the marine diatom Haslea ostrearia, is known to display antibacterial activities. Previous studies have demonstrated a prophylactic effect of marennine on bivalve larvae challenged with a pathogenic Vibrio splendidus, suggesting that the blue Haslea is a good candidate for applications in aquaculture as a source of a natural antimicrobial agent. Indeed, the genus Vibrio is ubiquitous in aquaculture ecosystems, and regular events of pathogenic invasion cause some of the biggest losses worldwide. To better characterize the effects of marennine on Vibrios, a panel of 30 Vibrio strains belonging to 10 different species was tested, including bivalve pathogenic species (e.g., Vibrio crassostreae and Vibrio harveyi). Vibrio strains were first exposed to 10 and 25 µg mL−1 of Blue Water (BW), a concentrated culture supernatant of H. ostrearia containing marennine. This screening evidenced a great diversity in responses, from growth stimulation to a total inhibition, at both the interspecific or intraspecific level. In a second series of experiments, 10 Vibrio strains were exposed to BW at concentrations ranging from 5 to 80 µg mL−1. The highest concentrations of BW did not systematically result in the highest growth inhibition as hormetic responses—opposite effects regarding the concentration—were occasionally evidenced. The relationships between marennine and Vibrio strains appear more complex than expected and justify further study—in particular, on the mechanisms of action—before considering applications as a natural prophylactic or antibiotic agent in aquaculture PY 2019 PD MAR SO Marine Drugs SN 1660-3397 PU MDPI AG VL 17 IS 3 UT 000466398200024 DI 10.3390/md17030160 ID 59598 ER EF