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Due to a lack in morphological features, taxonomic and phylogenetic studies of Trebouxiophycean algae can be a challenging task. Since chemotaxonomic markers could be a great assistance in this regard, 22 strains of aeroterrestrial Trebouxiophyceae were chemically screened for their polyol\u2010patterns as well as for mycosporine\u2010like amino acids (<jats:styled-content style=\"fixed-case\">MAA<\/jats:styled-content>s) in their aqueous extracts using <jats:styled-content style=\"fixed-case\">RP<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">HPLC<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">LC<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">MS<\/jats:styled-content>. <jats:sc>d<\/jats:sc>\u2010sorbitol was exclusively detected in members of the Prasiolaceae family. The novel <jats:styled-content style=\"fixed-case\">MAA<\/jats:styled-content> prasiolin and a related compound (\u201cprasiolin\u2010like\u201d) were present in all investigated members of the <jats:italic>Prasiola<\/jats:italic>\u2010clade, but missing in all other tested Trebouxiophyceae. While prasiolin could only be detected in field material directly after extraction, the \u201cprasiolin\u2010like\u201d compound present in the other algae was fully converted into prasiolin after 24\u00a0h. These findings suggest <jats:sc>d<\/jats:sc>\u2010sorbitol and prasiolin\u2010like compounds are suitable chemotaxonomic markers for the Prasiolaceae and <jats:italic>Prasiola<\/jats:italic>\u2010clade, respectively. Additional <jats:styled-content style=\"fixed-case\">UV<\/jats:styled-content>\u2010exposure experiments with selected strains show that <jats:styled-content style=\"fixed-case\">MAA<\/jats:styled-content> formation and accumulation can be induced, supporting their role as <jats:styled-content style=\"fixed-case\">UV<\/jats:styled-content>\u2010sunscreen.<\/jats:p>","DOI":"10.1111\/jpy.12619","type":"journal-article","created":{"date-parts":[[2018,1,18]],"date-time":"2018-01-18T16:28:29Z","timestamp":1516292909000},"page":"264-274","source":"Crossref","is-referenced-by-count":28,"title":["Polyols and <scp>UV<\/scp>\u2010sunscreens in the <i>Prasiola<\/i>\u2010clade (Trebouxiophyceae, Chlorophyta) as metabolites for stress response and chemotaxonomy"],"prefix":"10.1111","volume":"54","author":[{"given":"Vivien","family":"Hotter","sequence":"first","affiliation":[{"name":"Institute of Biological Sciences, Applied Ecology and Phycology University of Rostock Albert\u2010Einstein\u2010Stra\u00dfe 3 D\u201018059 Rostock Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karin","family":"Glaser","sequence":"additional","affiliation":[{"name":"Institute of Biological Sciences, Applied Ecology and Phycology University of Rostock Albert\u2010Einstein\u2010Stra\u00dfe 3 D\u201018059 Rostock Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anja","family":"Hartmann","sequence":"additional","affiliation":[{"name":"Institute of Pharmacy, Pharmacognosy University of Innsbruck Innrain 80\u201082\/IV A\u20106020 Innsbruck Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Markus","family":"Ganzera","sequence":"additional","affiliation":[{"name":"Institute of Pharmacy, Pharmacognosy University of Innsbruck Innrain 80\u201082\/IV A\u20106020 Innsbruck Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2955-0757","authenticated-orcid":false,"given":"Ulf","family":"Karsten","sequence":"additional","affiliation":[{"name":"Institute of Biological Sciences, Applied Ecology and Phycology University of Rostock Albert\u2010Einstein\u2010Stra\u00dfe 3 D\u201018059 Rostock Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,2,21]]},"reference":[{"key":"e_1_2_7_1_1","first-page":"22","article-title":"Citation classic \u2010 a new look at the statistical\u2010model identification","volume":"51","author":"Akaike H.","year":"1981","journal-title":"CC\/Eng. 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