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Physiological responses of polar benthic algae to ultraviolet radiation
Univ Rostock, Inst Biol Sci, D-18057 Rostock, Germany..
Univ Gothenburg, SE-40530 Gothenburg, Sweden..
Univ Kiel, Inst Polar Ecol, D-24148 Kiel, Germany..
Alfred Wegener Inst Polar & Marine Res, Dept Seaweed Biol, Sect Funct Ecol, D-27570 Bremerhaven, Germany..
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2009 (English)In: Botanica Marina, ISSN 0006-8055, E-ISSN 1437-4323, Vol. 52, no 6, 639-654 p.Article, review/survey (Refereed) Published
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Abstract [en]

Stratospheric ozone depletion and the concomitant increase in ultraviolet (UV) B radiation at the earth's surface represent major threats to polar marine ecosystems. Whereas in coastal rocky shore environments macroalgae constitute an assemblage of particular significance to ecosystem function, benthic diatoms dominate micro-phytobenthic assemblages, which typically grow on shallow-water sediments as highly productive and stabilising phototrophic biofilms. This review summarises present knowledge on how UV radiation affects the physiology of polar benthic algae with an emphasis on cell biological and structural changes, molecular targets and repair mechanisms, induction of reactive oxygen species and antioxidative strategies, photosynthesis and growth, photoprotective mechanisms, interactive effects between UV radiation and other abiotic factors, and finally ecological consequences. Although available data indicate that there are specific characteristics and adaptations in polar benthic micro- and macroalgae that explain their ecological success and limits under environmentally extreme conditions, much more research is needed to understand the underlying mechanisms. In particular, more ecosystem approaches and studies on interactive effects, as well as modern genomic, proteomic and metabolomic approaches could help address all open questions and depict a more holistic picture.

Place, publisher, year, edition, pages
2009. Vol. 52, no 6, 639-654 p.
Keyword [en]
avoidance, DNA repair, growth, interactive effects, life cycle, mycosporine-like amino acids, phlorotannins, photosynthesis, ultrastructure, UV sunscreens
Research subject
SWEDARP; SWEDARP 2003/04, King George Island; SWEDARP 2004/05, UV-strålningens effekter på bentiska primärproducenter i Antarktis
Identifiers
URN: urn:nbn:se:polar:diva-2559DOI: 10.1515/BOT.2009.077ISI: 000272161600013OAI: oai:DiVA.org:polar-2559DiVA: diva2:883108
Available from: 2015-12-16 Created: 2015-12-16 Last updated: 2017-12-01

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