{"refrec":{"BRefID":309920,"RR":"<b>Decelle, J.; Stryhanyuk, H.; Gallet, B.; Veronesi, G.; Schmidt, M.; Balzano, S.; Marro, S.; Uwizeye, C.; Jouneau, P.-H.; Lupette, J.; Jouhet, J.; Maréchal, E.; Schwab, Y.; Schieber, N.L.; Tucoulou, R.; Richnow, H.; Finazzi, G.; Musat, N.</b> (2019). Algal remodeling in a ubiquitous planktonic photosymbiosis. <i>Curr. Biol. 29(6)</i>: 968-978.e4. <a href=\"https://dx.doi.org/10.1016/j.cub.2019.01.073\" target=\"_blank\">https://dx.doi.org/10.1016/j.cub.2019.01.073</a>","BEntID":302248,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Curr. Biol. 29(6)</i>: 968-978.e4. <a href=\"https://dx.doi.org/10.1016/j.cub.2019.01.073\" target=\"_blank\">https://dx.doi.org/10.1016/j.cub.2019.01.073</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Decelle, J.; Stryhanyuk, H.; Gallet, B.; Veronesi, G.; Schmidt, M.; Balzano, S.; Marro, S.; Uwizeye, C.; Jouneau, P.-H.; Lupette, J.; Jouhet, J.; Maréchal, E.; Schwab, Y.; Schieber, N.L.; Tucoulou, R.; Richnow, H.; Finazzi, G.; Musat, N.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Decelle, J. <i>et al.</i>","Englishabstract":"Photosymbiosis between single-celled hosts and microalgae is common in oceanic plankton, especially in oligotrophic surface waters. However, the functioning of this ecologically important cell-cell interaction and the subcellular mechanisms allowing the host to accommodate and benefit from its microalgae remain enigmatic. Here, using a combination of quantitative single-cell structural and chemical imaging techniques (FIB-SEM, nanoSIMS, Synchrotron X-ray fluorescence), we show that the structural organization, physiology, and trophic status of the algal symbionts (the haptophyte <i>Phaeocystis</i>) significantly change within their acantharian hosts compared to their free-living phase in culture. In symbiosis, algal cell division is blocked, photosynthesis is enhanced, and cell volume is increased by up to 10-fold with a higher number of plastids (from 2 to up to 30) and thylakoid membranes. The multiplication of plastids can lead to a 38-fold increase of the total plastid volume in a cell. Subcellular mapping of nutrients (nitrogen and phosphorous) and their stoichiometric ratios shows that symbiotic algae are impoverished in phosphorous and suggests a higher investment in energy-acquisition machinery rather than in growth. Nanoscale imaging also showed that the host supplies a substantial amount of trace metals (e.g., iron and cobalt), which are stored in algal vacuoles at high concentrations (up to 660 ppm). Sulfur mapping reveals a high concentration in algal vacuoles that may be a source of antioxidant molecules. Overall, this study unveils an unprecedented morphological and metabolic transformation of microalgae following their integration into a host, and it suggests that this widespread symbiosis is a farming strategy wherein the host engulfs and exploits microalgae.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Algal remodeling in a ubiquitous planktonic photosymbiosis","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:01.897972","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"symbiosis; plankton; microalga; single-cell imaging; photosynthesis; mass spectrometry imaging; 3D electron microscopy; eukaryotes; plastid; <i>Phaeocystis</i>","OtherDescriptors":null,"Notes":null,"AnaPub":2019,"MonPub":null,"DateUpdate":"2019-04-17","DateCreate":"2019-03-28","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000461455600023","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.cub.2019.01.073"},"refs":null,"anarec":{"AnaID":309920,"PubliDate":2019,"Pagination":"968-978.e4","XtraPublOfAnaID":null,"ISBN":null,"Volume":"29","Issue":"6","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":72005,"SerRR":"Current Biology. 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