Spherulization as a process for the exudation of chemical cues by the encrusting sponge C. crambeReport as inadecuate




Spherulization as a process for the exudation of chemical cues by the encrusting sponge C. crambe - Download this document for free, or read online. Document in PDF available to download.

1 ICN - Institut de Chimie de Nice 2 LBDV - Laboratoire de Biologie du Développement de Villefranche sur mer 3 IMBE - Institut méditerranéen de biodiversité et d-écologie marine et continentale 4 LBBM - Laboratoire de Biodiversité et Biotechnologies Microbiennes 5 NUI Galway - National University of Ireland Galway 6 GEOAZUR - Géoazur

Abstract : Ecological interactions in the marine environment are now recognized to be partly held by chemical cues produced by marine organisms. In particular, sponges are sessile animals thought to rely on the bioactive substances they synthesize to ensure their development and defense. However, the mechanisms leading the sponges to use their specialized metabolites as chemical cues remain unknown. Here we report the constant release of bioactive polycyclic guanidinic alkaloids by the Mediterranean sponge Crambe crambe into the dissolved and the particulate phases using a targeted metabolomics study. These compounds were proven to be stored into already described specialized spherulous sponge cells and dispersed into the water column after release through the sponge exhaling channels oscula, leading to a chemical shield surrounding the sponge. Low concentrations of these compounds were demonstrated to have teratogenic effects on embryos of a common sea squirt ascidian. This mechanism of action called spherulization may therefore contribute to the ecological success of encrusting sponges that need to extend their substrate cover to expand.

Keywords : Chemical ecology Metabolomics





Author: Eva Ternon - Lina Zarate - Sandrine Chenesseau - Julie Croué - Rémi Dumollard - Marcelino T. Suzuki - Olivier P. Thomas -

Source: https://hal.archives-ouvertes.fr/



DOWNLOAD PDF




Related documents