complementary uv-absorption of mycosporine-like amino acids and scytonemin is responsible for the uv-insensitivity of photosynthesis in nostoc flagelliforme互补的紫外吸收mycosporine-like氨基酸和scytonemin负责uv-insensitivity光合作用的念珠藻属flagelliforme.pdfVIP

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complementary uv-absorption of mycosporine-like amino acids and scytonemin is responsible for the uv-insensitivity of photosynthesis in nostoc flagelliforme互补的紫外吸收mycosporine-like氨基酸和scytonemin负责uv-insensitivity光合作用的念珠藻属flagelliforme.pdf

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complementary uv-absorption of mycosporine-like amino acids and scytonemin is responsible for the uv-insensitivity of photosynthesis in nostoc flagelliforme互补的紫外吸收mycosporine-like氨基酸和scytonemin负责uv-insensitivity光合作用的念珠藻属flagelliforme

Mar. Drugs 2010, 8, 106-121; doi:10.3390/md8010106 OPEN ACCESS Marine Drugs ISSN 1660-3397 /journal/marinedrugs Article Complementary UV-Absorption of Mycosporine-like Amino Acids and Scytonemin is Responsible for the UV-Insensitivity of Photosynthesis in Nostoc flagelliforme Lorenzo Ferroni 1, Manfred Klisch 2, Simonetta Pancaldi 1 and Donat-Peter Häder 2,* 1 Laboratory of Plant Cytophysiology, Department of Biology and Evolution, University of Ferrara, Corso Ercole I dEste, 32, 44100 Ferrara, Italy; E-Mails: lorenzo.ferroni@unife.it (L.F.); simonetta.pancaldi@unife.it (S.P.) 2 Department for Biology, Friedrich-Alexander University Erlangen-Nuremberg, Staudtstraße 5, 91058 Erlangen, Germany; E-Mail: mklisch@biologie.uni-erlangen.de (M.K.) * Author to whom correspondence should be addressed; E-Mail: dphaeder@biologie.uni-erlangen.de; Tel.: +49-9131-85-28216; Fax: +49-9131-85-28215. Received: 4 December 2009; in revised form: 5 January 2010 / Accepted: 19 January 2010 / Published: 20 January 2010 Abstract: Mycosporine-like amino acids (MAAs) and scytonemin are UV-screening compounds that have presumably appeared early in the history of life and are widespread in cyanobacteria. Natural colonies of the UV-insensitive Nostoc flagelliforme were found to be especially rich in MAAs (32.1 mg g DW-1), concentrated in the glycan sheath together with scytonemin. MAAs are present in the form of oligosaccharide-linked molecules. Photosystem II activity, measured using P