PMID: 8982390Dec 18, 1996Paper

The lifetimes and energies of the first excited singlet states of diadinoxanthin and diatoxanthin: the role of these molecules in excess energy dissipation in algae

Biochimica Et Biophysica Acta
H A FrankM R Wasielewski

Abstract

The lifetimes of the first excited singlet states (2(1)A(g)) of diadinoxanthin and diatoxanthin, carotenoids involved in the xanthophyll cycle in some genera of algae, have been measured by femtosecond time-resolved optical spectroscopy to be 22.8 +/- 0.1 ps and 13.3 +/- 0.1 ps, respectively. Using the energy gap law for radiationless transitions set forth by Englman and Jortner (Mol. Phys. 18 (1970) 145-164), these lifetimes correspond to S1 excited state energies of 15210 cm-1 for diadinoxanthin and 14620 cm-1 for diatoxanthin. The lowest excited singlet state energy of Chl a has an energy of 14700 cm-1. The fact that the S1 state energy of diadinoxanthin lies above that of Chl a, whereas the S1 state energy of diatoxanthin lies below that of Chl a, suggests that the xanthophyll cycle involving the enzymatic interconversion of diadinoxanthin and diatoxanthin may play a role in regulating energy flow between these molecules and Chl a in many species of algae, essentially fulfilling a role identical to that proposed for violaxanthin and zeaxanthin in higher plants and green algae (Frank et al. (1994) Photosyn. Res. 41, 389-395).

Citations

Mar 13, 2010·Photosynthesis Research·Reimund Goss, Torsten Jakob
Oct 1, 1996·Journal of Photochemistry and Photobiology. B, Biology·A J Young, H A Frank
Nov 15, 2008·The Journal of Physical Chemistry. a·Ronald L ChristensenHarry A Frank
Jul 21, 1999·Proceedings of the National Academy of Sciences of the United States of America·M Lohr, C Wilhelm
Nov 20, 2002·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·T A MooreD Gust
Feb 2, 2010·Biochimica Et Biophysica Acta·Nina GildenhoffJosef Wachtveitl
Oct 18, 2012·Plant Signaling & Behavior·Baishnab Charan Tripathy, Ralf Oelmüller
May 24, 2014·Journal of Plant Physiology·Reimund Goss, Bernard Lepetit
Mar 9, 2011·Physiologia Plantarum·John A Raven
Jul 17, 2018·Photosynthesis Research·Allen K Derks, Doug Bruce
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Apr 15, 2004·Chemical Reviews·Tomás Polívka, Villy Sundström
Dec 5, 2017·The Journal of Physical Chemistry. a·Jordan A GrecoRobert R Birge
Jul 7, 2012·The Journal of Physical Chemistry. B·Milan DurchanTomáš Polívka
Oct 25, 2001·The Journal of Organic Chemistry·Satoshi ShinodaAtsuhiro Osuka

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