Abstract
The mycosporine-like amino acid (MAA) profile of a rice-field cyanobacterium, Anabaena doliolum, was studied under PAR and PAR + UVR conditions. The high-performance liquid chromatographic analysis of water-soluble compounds reveals the biosynthesis of three MAAs, mycosporine-glycine (λ max = 310 nm), porphyra-334 (λ max = 334 nm) and shinorine (λ max = 334 nm), with retention times of 4.1, 3.5 and 2.3 min, respectively. This is the first report for the occurrence of mycosporine-glycine and porphyra-334 in addition to shinorine in Anabaena strains studied so far. The results indicate that mycosporine-glycine (monosubstituted) acts as a precursor for the biosynthesis of the bisubstituted MAAs shinorine and porphyra-334. Mycosporine-glycine was under constitutive control while porphyra-334 and shinorine were induced by UV-B radiation, indicating the involvement of UV-regulated enzymes in the biotransformation of MAAs. It seems that A. doliolum is able to protect its cell machinery from UVR by synthesizing a complex set of MAAs and thus is able to survive successfully during the summer in its natural brightly lit habitats.









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- HPLC:
-
High-performance liquid chromatography
- MAAs:
-
Mycosporine-like amino acids
- PAR:
-
Photosynthetically active radiation
- UVR:
-
Ultraviolet radiation
- UV-A:
-
Ultraviolet-A
- UV-B:
-
Ultraviolet-B
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The authors sincerely acknowledge the excellent technical support by Martin Schuster.
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Singh, S.P., Sinha, R.P., Klisch, M. et al. Mycosporine-like amino acids (MAAs) profile of a rice-field cyanobacterium Anabaena doliolum as influenced by PAR and UVR. Planta 229, 225–233 (2008). https://doi.org/10.1007/s00425-008-0822-1
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DOI: https://doi.org/10.1007/s00425-008-0822-1


