Next Article in Journal
Qualitative and Quantitative Saponin Contents in Five Sea Cucumbers from the Indian Ocean
Next Article in Special Issue
Anti-photoaging and Photoprotective Compounds Derived from Marine Organisms
Previous Article in Journal
Antimicrobial Photodynamic Therapy: Study of Bacterial Recovery Viability and Potential Development of Resistance after Treatment
Article

Complementary UV-Absorption of Mycosporine-like Amino Acids and Scytonemin is Responsible for the UV-Insensitivity of Photosynthesis in Nostoc flagelliforme

1
Laboratory of Plant Cytophysiology, Department of Biology and Evolution, University of Ferrara, Corso Ercole I d'Este, 32, 44100 Ferrara, Italy
2
Department for Biology, Friedrich-Alexander University Erlangen-Nuremberg, Staudtstraße 5, 91058 Erlangen, Germany
*
Author to whom correspondence should be addressed.
Mar. Drugs 2010, 8(1), 106-121; https://doi.org/10.3390/md8010106
Received: 4 December 2009 / Revised: 5 January 2010 / Accepted: 19 January 2010 / Published: 20 January 2010
(This article belongs to the Special Issue Marine Photoprotective Compounds)
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 PAM fluorescence and oxygen evolution, was used as a most sensitive physiological parameter to analyse the effectiveness of UV-protection. Laboratory experiments were performed under controlled conditions with a simulated solar radiation specifically deprived of UV-wavebands with cut-off filters (295, 305, 320, 345 and 395 nm). The UV-insensitivity of N. flagelliforme was found to cover the whole UV-A (315–400 nm) and UV-B (280–320 nm) range and is almost certainly due to the complementary UV-absorption of MAAs and scytonemin. The experimental approach used is proposed to be suitable for the comparison of the UV-protection ability in organisms that differ in their complement of UV-sunscreen compounds. Furthermore, this study performed with a genuinely terrestrial organism points to the relevance of marine photoprotective compounds for life on Earth, especially for the colonization of terrestrial environments. View Full-Text
Keywords: mycosporine-like amino acids; Nostoc flagelliforme; scytonemin; photosynthesis; UV-radiation mycosporine-like amino acids; Nostoc flagelliforme; scytonemin; photosynthesis; UV-radiation
Show Figures

Graphical abstract

MDPI and ACS Style

Ferroni, L.; Klisch, M.; Pancaldi, S.; Häder, D.-P. Complementary UV-Absorption of Mycosporine-like Amino Acids and Scytonemin is Responsible for the UV-Insensitivity of Photosynthesis in Nostoc flagelliforme. Mar. Drugs 2010, 8, 106-121. https://doi.org/10.3390/md8010106

AMA Style

Ferroni L, Klisch M, Pancaldi S, Häder D-P. Complementary UV-Absorption of Mycosporine-like Amino Acids and Scytonemin is Responsible for the UV-Insensitivity of Photosynthesis in Nostoc flagelliforme. Marine Drugs. 2010; 8(1):106-121. https://doi.org/10.3390/md8010106

Chicago/Turabian Style

Ferroni, Lorenzo, Manfred Klisch, Simonetta Pancaldi, and Donat-Peter Häder. 2010. "Complementary UV-Absorption of Mycosporine-like Amino Acids and Scytonemin is Responsible for the UV-Insensitivity of Photosynthesis in Nostoc flagelliforme" Marine Drugs 8, no. 1: 106-121. https://doi.org/10.3390/md8010106

Find Other Styles

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop