caa a22 4500 445819219 CHVBK 20180317145238.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00338-010-0691-5 doi (NATIONALLICENCE)springer-10.1007/s00338-010-0691-5 Differential stability of photosynthetic membranes and fatty acid composition at elevated temperature in Symbiodinium [Elektronische Daten] [E. Díaz-Almeyda, P. Thomé, M. El Hafidi, R. Iglesias-Prieto] Coral reefs are threatened by increasing surface seawater temperatures resulting from climate change. Reef-building corals symbiotic with dinoflagellates in the genus Symbiodinium experience dramatic reductions in algal densities when exposed to temperatures above the long-term local summer average, leading to a phenomenon called coral bleaching. Although the temperature-dependent loss in photosynthetic function of the algal symbionts has been widely recognized as one of the early events leading to coral bleaching, there is considerable debate regarding the actual damage site. We have tested the relative thermal stability and composition of membranes in Symbiodinium exposed to high temperature. Our results show that melting curves of photosynthetic membranes from different symbiotic dinoflagellates substantiate a species-specific sensitivity to high temperature, while variations in fatty acid composition under high temperature rather suggest a complex process in which various modifications in lipid composition may be involved. Our results do not support the role of unsaturation of fatty acids of the thylakoid membrane as being mechanistically involved in bleaching nor as being a dependable tool for the diagnosis of thermal susceptibility of symbiotic reef corals. Springer-Verlag, 2010 Thermal stress nationallicence Fatty acid desaturation nationallicence Symbiotic dinoflagellates nationallicence Coral bleaching nationallicence Díaz-Almeyda E. Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 1152, 77500, Cancun, Quintana Roo, Mexico aut Thomé P. Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 1152, 77500, Cancun, Quintana Roo, Mexico aut El Hafidi M. Cardiovascular Biomedicine Department, Instituto Nacional de Cardiología "Ignacio Chávez”, Juan Badiano 1, Sección XVI, 14080, Tlalpan, México DF, Mexico aut Iglesias-Prieto R. Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 1152, 77500, Cancun, Quintana Roo, Mexico aut Coral Reefs Springer-Verlag 30/1(2011-03-01), 217-225 0722-4028 30:1<217 2011 30 338 https://doi.org/10.1007/s00338-010-0691-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00338-010-0691-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Díaz-Almeyda E. Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 1152, 77500, Cancun, Quintana Roo, Mexico aut NATIONALLICENCE 700 1- Thomé P. Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 1152, 77500, Cancun, Quintana Roo, Mexico aut NATIONALLICENCE 700 1- El Hafidi M. Cardiovascular Biomedicine Department, Instituto Nacional de Cardiología "Ignacio Chávez”, Juan Badiano 1, Sección XVI, 14080, Tlalpan, México DF, Mexico aut NATIONALLICENCE 700 1- Iglesias-Prieto R. Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado Postal 1152, 77500, Cancun, Quintana Roo, Mexico aut NATIONALLICENCE 773 0- Coral Reefs Springer-Verlag 30/1(2011-03-01), 217-225 0722-4028 30:1<217 2011 30 338 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer