{"refrec":{"BRefID":210710,"RR":"<b>Ladriere, O.; Compere, P.; Decloux, N.; Vandewalle, P.; Poulicek, M.</b> (2008). Morphological alterations of zooxanthellae in bleached cnidarian hosts. <i>Cah. Biol. Mar. 49(3)</i>: 215-227","BEntID":202632,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Cah. Biol. Mar. 49(3)</i>: 215-227","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Ladriere, O.; Compere, P.; Decloux, N.; Vandewalle, P.; Poulicek, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Ladriere, O. <i>et al.</i>","Englishabstract":"Studying the morphological changes of zooxanthellae in the host gastroderm is essential to understand the mechanisms of bleaching. Transmission electron microscopy was used to observe samples from four coral species-three collected from a barrier reef in Madagascar (<i>Acropora digitifera</i> (Dana, 1846), <i>Echinopora hirsutissima</i> Milne-Edwards & Haime, 1849 and <i>Porites (Synaraea) rus</i> Forskal, 1775)) and one cut from an aquarium-grown coral (<i>Pocillopora damicornis</i> (Linnaeus, 1758)-and from the hermatypic (zooxanthellae-containing) sea anemone <i>Aiptasia pulchella</i> (Carlgren, 1943). Zooxanthellae from bleached animals showed different stages of degradation or disorganization. Some were free, detached from the host gastroderm, associated or not with host-cell remains. Others were vacuolated, with abundant reserve material globules and angular holes probably created by the loss of crystalline material during cutting. Experimentally heat-shocked <i>P. damicornis</i> harboured, moreover, a greater number of dividing algae. Bleached individuals were found to vary as regards their response to stress, and zooxanthellae expelled from heat-shocked anemones showed a greater mitotic index and a higher survival rate than algae extracted or naturally externalized from healthy individuals. We propose a combination of morphological criteria for use in diagnosing the health state of algae-cnidarian symbiosis, so vulnerable in the case of bleaching.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Morphological alterations of zooxanthellae in bleached cnidarian hosts","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"zooxanthellae; ultrastructure; alterations; symbiosis; coral bleaching;","OtherDescriptors":null,"Notes":null,"AnaPub":2008,"MonPub":null,"DateUpdate":"2017-01-25","DateCreate":"2011-12-22","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000259557400001","VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":210710,"PubliDate":2008,"Pagination":"215-227","XtraPublOfAnaID":null,"ISBN":null,"Volume":"49","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42348,"SerRR":"Cahiers de Biologie Marine. 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