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. 1996 May 28;93(11):5258–5263. doi: 10.1073/pnas.93.11.5258

Ultraviolet-B photodestruction of a light-harvesting complex.

K Lao 1, A N Glazer 1
PMCID: PMC39232  PMID: 8643563

Abstract

Cyanobacteria are important contributors to global photosynthesis in both marine and terrestrial environments. Quantitative data are presented on UV-B-induced damage to the major cyanobacterial photosynthetic light harvesting complex, the phycobilisome, and to each of its constituent phycobiliproteins. The photodestruction quantum yield, phi295 nm, for the phycobiliproteins is high (approximately 10(-3), as compared with approximately 10(-7) for visible light). Energy transfer on a picosecond time scale does not compete with photodestruction. Photodamage to phycobilisomes in vitro and in living cells is amplified by causing dissociation and loss of function of the complex. In photosynthetic organisms, UV-B damage to light-harvesting complexes may significantly exceed that to DNA.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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