Sargassum polyceratium (Phaeophyceae, Fucaceae) surface molecule activity towards fouling organisms and embryonic development of benthic species
-
Marie Thabard
,
Olivier Gros
Abstract
Coral reefs have undergone profound ecological changes over recent decades. Areas formerly covered by scleractinian coral species are now often overgrown by macroalgae. In Martinique (West Indies), this phenomenon has lead to the colonisation of numerous coral reefs by algae, amongst which Sargassum is one of the most prominent. This study focuses on potential defence molecules produced by Sargassum polyceratium. The hexane dipping method was employed to extract surface molecules on fresh material, and their bioactivities were assessed against bacteria (marine and estuarine), and marine tropical invertebrates [an annelid (Pseudonereis sp.), a bivalve (Codakia orbicularis) and a sea urchin (Diadema antillarum)]. Extracts were active against all microorganisms tested (MIC=150 or 300 μg ml-1), early stages of development in Pseudonereis sp. (MIC=100 μg ml-1) and embryos of C. orbicularis and D. antillarum (MIC=5 μg ml-1), suggesting the production of defence compounds by S. polyceratium.
©2011 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Research Articles
- Succession patterns in algal turf vegetation on a Caribbean coral reef
- Carpospore and tetraspore release and survival in Chondracanthus squarrulosus (Rhodophyta: Gigartinaceae) from the Gulf of California
- Morphology and taxonomy of Anadyomene species (Cladophorales, Chlorophyta) from Bahia, Brazil
- Sargassum polyceratium (Phaeophyceae, Fucaceae) surface molecule activity towards fouling organisms and embryonic development of benthic species
- Colpomenia claytonii sp. nov. (Scytosiphonaceae, Phaeophyceae) based on morphology and mitochondrial cox3 sequences
- A survey of the benthic aquatic flora in transitional water systems of Greece and Cyprus (Mediterranean Sea)
- Morphological study of the genus Cocconeis Ehrenberg (Bacillariophyceae) collected during the 1897–1899 Belgian Antarctic Expedition
- Cloning differentially expressed salt induced cDNAs from Dunaliella salina under super saturated salt stress using subtractive hybridization
- Antioxidant response of the microalga Dunaliella salina under salt stress
- Temporal variation in growth and reproduction of Enhalus acoroides (L.f.) Royle in a monospecific meadow in Haad Chao Mai National Park, Trang Province, Thailand
- Lignicolous marine fungi from Yokosuka, Japan
