{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T17:02:39Z","timestamp":1768410159133,"version":"3.49.0"},"reference-count":48,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2018,10,15]],"date-time":"2018-10-15T00:00:00Z","timestamp":1539561600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Phycology"],"published-print":{"date-parts":[[2018,12]]},"abstract":"<jats:p>Filaments in the surface layers of metaphytic mats are exposed to high photon flux densities of <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">UVBR<\/jats:styled-content>. We investigated the effect of <jats:styled-content style=\"fixed-case\">UVBR<\/jats:styled-content>\u00a0exposure on growth of eight isolates of common metaphytic algae (<jats:italic>Cladophora<\/jats:italic>,<jats:italic> Mougeotia<\/jats:italic>,<jats:italic> Oedogonium<\/jats:italic>,<jats:italic> Pithophora<\/jats:italic>,<jats:italic> Spirogyra<\/jats:italic>, and <jats:italic>Zygnema<\/jats:italic>) acclimated to either high or low <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> levels prior to <jats:styled-content style=\"fixed-case\">UVBR<\/jats:styled-content> exposure. All isolates acclimated to low <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> exhibited significant reductions in growth rate caused by the <jats:styled-content style=\"fixed-case\">UVBR<\/jats:styled-content> exposure (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.05). Acclimation to high <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> resulted in seven of the isolates being more tolerant of the <jats:styled-content style=\"fixed-case\">UVB<\/jats:styled-content> exposure. The two <jats:italic>Zygnema<\/jats:italic> isolates exhibited the most pronounced effect of high <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> acclimation with growth rates of <jats:styled-content style=\"fixed-case\">UVB<\/jats:styled-content> exposed treatments being equal to that of controls (<jats:italic>P<\/jats:italic>\u00a0&gt;\u00a00.05). High <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> acclimation also protected chlorophyll <jats:italic>a<\/jats:italic> levels in the <jats:italic>Zygnema<\/jats:italic> isolates. Absorption of <jats:styled-content style=\"fixed-case\">UVB<\/jats:styled-content> by methanol extracts increased 322%\u2013381% for the two <jats:italic>Zygnema<\/jats:italic> isolates when high <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> acclimated. The broad absorption peak at 270\u00a0nm suggests that phenolic compounds were responsible. Previous studies have shown that <jats:italic>Zygnema<\/jats:italic> isolates from extreme environments tolerate <jats:styled-content style=\"fixed-case\">UVBR<\/jats:styled-content> and contain <jats:styled-content style=\"fixed-case\">UVB<\/jats:styled-content> screening compounds, but our results extend these adaptions to <jats:italic>Zygnema<\/jats:italic> from typical temperate zone habitats. Although none of the other metaphytic algae produced <jats:styled-content style=\"fixed-case\">UVB<\/jats:styled-content> absorbing compounds, they all exhibited higher growth rates under <jats:styled-content style=\"fixed-case\">UVBR<\/jats:styled-content> exposure following high <jats:styled-content style=\"fixed-case\">PAR<\/jats:styled-content> acclimation. This suggests that the algae evaluated have inducible defenses against <jats:styled-content style=\"fixed-case\">UVBR<\/jats:styled-content> exposure that coupled with their mat structure would provide an adaption to the challenging light environment in shallow\u2010water habitats.<\/jats:p>","DOI":"10.1111\/jpy.12786","type":"journal-article","created":{"date-parts":[[2018,9,19]],"date-time":"2018-09-19T10:05:14Z","timestamp":1537351514000},"page":"818-828","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Comparison of <scp>UVB<\/scp> effects on growth and induction of <scp>UVB<\/scp> screening compounds in isolates of metaphytic algae from temperate zone streams and ponds"],"prefix":"10.1111","volume":"54","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1449-4729","authenticated-orcid":false,"given":"Steven W.","family":"O'Neal","sequence":"first","affiliation":[{"name":"Department of Biological Sciences Southwestern Oklahoma State University 100 Campus Drive Weatherford Oklahoma 73096 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Angie M.","family":"Hoover","sequence":"additional","affiliation":[{"name":"Division of Coastal Sciences Study Gulf Coast Research Laboratory 703 East Beach Drive Ocean Springs Mississippi 39564 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,10,15]]},"reference":[{"key":"e_1_2_8_1_1","first-page":"247","volume-title":"Stat View II","author":"Abacus Concepts","year":"1990"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/jpy.12075"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1461-0248.2007.01022.x"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/etc.5620190419"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11157-006-0002-3"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s004250000313"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1042\/bj2550937"},{"key":"e_1_2_8_8_1","first-page":"1701","article-title":"Microalgae and cyanobacteria as a source of glycosidase inhibitors","volume":"133","author":"Cannell R. 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