Greening effect on oysters and biological activities of the blue pigments produced by the diatom Haslea karadagensis (Naviculaceae)

• Published in: Aquaculture
• Main Authors: Gastineau, Romain, Hardivillier, Yann, Leignel, Vincent, Tekaya, Nafissa, Morançais, Michèle, Fleurence, Joël, Davidovich, N., Jacquette, Boris, Gaudin, P., Hellio, Claire, Bourgougnon, Nathalie, Mouget, J.L.
• Other Authors: Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN), School of Biological Sciences, University of Portsmouth, Laboratoire de Biotechnologie et Chimie Marines (LBCM), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2012
• Subjects: Biological activities; Haslea karadagensis; Herpesvirus; Oyster farming; Probiotic; Vibrio; [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology; Crassostrea gigas
• Online Access: https://hal.science/hal-00858125; https://doi.org/10.1016/j.aquaculture.2012.09.016

International audience Haslea karadagensis is a recently-described diatom, the second species of blue diatom to be identified, after Haslea ostrearia, the type species of the genus Haslea, which produces marennine, the water soluble pigment involved in the greening of oysters. Haslea karadagensis also produces a blue grey pigment, with different spectral characteristics from marennine itself. This study demonstrates that the pigment from H. karadagensis can colour the gills of two oysters of economic importance, Crassostrea gigas and Ostrea edulis, when they are fed with a suspension of algae, in the same way as the marennine produced by H. ostrearia. Like marennine, the purified pigment produced by H. karadagensis displays several different biological activities. Both the intracellular and extracellular forms of the pigment have been shown to inhibit the growth of marine bacteria (Polaribacter irgensii, Vibrio aestuarianus, Pseudoalteromonas elyakowii) and fungi (Corollospora maritima, Lulworthia sp., and Dendryphiella salina). The pigment also displays antiviral activity against Herpes simplex virus type 1 (HSV-1). In light of these preliminary results, the use of H. karadagensis and putative applications of its pigment in aquaculture, food chemistry and ecophysiological research, are discussed.