DOI: 10.1073/pnas.96.3.1135. Unusual carotenoid composition and a new type of xanthophyll cycle in plants

Unusual carotenoid composition and a new type of xanthophyll cycle in plants

10.1073/pnas.96.3.1135

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

The capture of photons by the photosynthetic apparatus is the first step in photosynthesis in all autotrophic higher plants. This light capture is dominated by pigment-containing proteins known as light-harvesting complexes (LHCs). The xanthophyll–carotenoid complement of these LHCs (neoxanthin, violaxanthin, and lutein) is highly conserved, with no deletions and few, uncommon additions. We report that neoxanthin, considered an integral component of LHCs, is stoichiometrically replaced by lutein-5,6-epoxide in the parasitic angiosperm Cuscuta reflexa , without compromising the structural integrity of the LHCs. Lutein-5,6-epoxide differs from neoxanthin in that it is involved in a light-driven deepoxidation cycle similar to the deepoxidation of violaxanthin in the xanthophyll cycle, which is implicated in protection against photodamage. The absence of neoxanthin and its replacement by lutein-5,6-epoxide changes our understanding of the structure-function relationship in LHCs, has implications for biosynthetic pathways involving neoxanthin (such as the plant hormone abscisic acid), and identifies one of the early steps associated with the evolution of heterotrophy from autotrophy in plants.

Bibliography

Bungard, R. A., Ruban, A. V., Hibberd, J. M., Press, M. C., Horton, P., & Scholes, J. D. (1999). Unusual carotenoid composition and a new type of xanthophyll cycle in plants. Proceedings of the National Academy of Sciences, 96(3), 1135â1139.

Authors 6

Ralph A. Bungard (first)
Alexander V. Ruban (additional)
Julian M. Hibberd (additional)
Malcolm C. Press (additional)
Peter Horton (additional)
Julie D. Scholes (additional)

References 29 Referenced 129

10.1111/j.1365-3040.1993.tb00485.x
R A Bungard, D McNeil, J D Morton Aust J Plant Physiol 24, 205–214 (1997). / Aust J Plant Physiol by Bungard R A (1997)
10.1038/367614a0
10.1038/350130a0
H-S Lee, B V Milborrow Aust J Plant Pysiol 24, 715–726 (1997). / Aust J Plant Pysiol by Lee H-S (1997)
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10.1146/annurev.arplant.47.1.655
10.1007/BF00040588
C W dePamphilis Parasitic Plants, eds M C Press, J D Graves (Chapman & Hall, London), pp. 177–205 (1995). / Parasitic Plants by dePamphilis C W (1995)
D L Nickrent, R J Duff, A E Colwell, A D Wolfe, N D Young, K E Steiner, C W dePamphilis Molecular Systematics of Plants II. DNA Sequencing, eds D E Soltis, P S Soltis, J J Doyle (Kluwer, Boston), pp. 211–241 (1998). (10.1007/978-1-4615-5419-6_8) / Molecular Systematics of Plants II. DNA Sequencing by Nickrent D L (1998)
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H H Strain Biochemistry of Chloroplasts, ed T W Goodwin (Academic, London), pp. 387–406 (1966). / Biochemistry of Chloroplasts by Strain H H (1966)
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B Pogson, K A McDonald, M Troung, G Britton, D DellaPenna Plant Cell 8, 1627–1639 (1996). / Plant Cell by Pogson B (1996)
10.1126/science.276.5320.1872

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:43 a.m.)
Deposited	3 years, 4 months ago (April 13, 2022, 5:27 p.m.)
Indexed	10 hours, 26 minutes ago (Aug. 27, 2025, 12:04 p.m.)
Issued	26 years, 6 months ago (Feb. 2, 1999)
Published	26 years, 6 months ago (Feb. 2, 1999)
Published Online	26 years, 6 months ago (Feb. 2, 1999)
Published Print	26 years, 6 months ago (Feb. 2, 1999)

Funders 0

None

BibTeX

@article{Bungard_1999, title={Unusual carotenoid composition and a new type of xanthophyll cycle in plants}, volume={96}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.96.3.1135}, DOI={10.1073/pnas.96.3.1135}, number={3}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Bungard, Ralph A. and Ruban, Alexander V. and Hibberd, Julian M. and Press, Malcolm C. and Horton, Peter and Scholes, Julie D.}, year={1999}, month=feb, pages={1135–1139} }

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