Abstract
Leaves of avocado (Persea americana) accumulate the α-xanthophyll lutein-epoxide (Lx) in excess of violaxanthin (V) in shaded habitats. On transfer to strong light both Lx and V are deepoxidised by violaxanthin de-epoxidase (VDE) to lutein (L) and to antheraxanthin (A) and zeaxanthin (Z) respectively, with about the same kinetics. However, whereas Z and A are rapidly epoxidised to form V by zeaxanthin epoxidase (ZE) when in shade or darkness, lutein is converted to Lx about 250 × more slowly, and hence Lx remains low in sun leaves. We investigated relationships between xanthophyll pool sizes and PSII efficiency (dark adapted Fv/Fm) in avocado leaves and discuss implications for the regulation of light harvesting efficiency arising from the differing epoxidation kinetics of these two co-located xanthophyll cycles
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Bungard RA, Ruban AV, Hibberd JM, Press MC, Horton P, Scholes JD (1999) Unusual carotenoid composition and a new type of xanthophyll cycle in plants. Proc Natl Acad Sci USA 96:1135-1139.
Demmig-Adams B, Adams III WW, Mattoo A (eds) (2006) “Photoprotection, Photoinhibition, Gene Regulation, and Environment”. Advances in Photosynthesis and Respiration, Vol. 21, Springer, Dordrecht, The Netherlands.
García-Plazoala JI, Olano JM, Hernández A, Becerril JM (2003) The operation of the lutein epoxide cycle correlates with energy dissipation. Funct Plant Biol 30:319-324.
García-Plazaola JI, Matsubara S, Osmond CB (2007) The lutein epoxide cycle in higher plants: Its relationships to other xanthophyll cycles and possible functions. Funct Plant Biol 34:759-773.
Matsubara S, Naumann M, Martin R, Nichol C, Rascher U, Morosinotto T, Bassi R, Osmond B (2005) Slowly reversible de-epoxidation of lutein-epoxide in deep shade leaves of a tropical tree legume may ‘lock-in’ lutein-based photoprotection during acclimation to strong light. J Exp Bot 56:461-468.
Matsubara S, Morisinotto T, Osmond CB, Bassi R (2007) Short- and long-term operation of the lutein-epoxide cycle in light-harvesting complexes. Plant Physiol 144:926-941.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2008 Springer Science + Business Media, B.V.
About this paper
Cite this paper
Osmond, C.B., Förster, B., Pogson, B.J. (2008). Dynamics of the Truncated Lutein Epoxide Cycle in Avocado (Persea americana L.); Implications for Efficiency of Light Harvesting. In: Allen, J.F., Gantt, E., Golbeck, J.H., Osmond, B. (eds) Photosynthesis. Energy from the Sun. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6709-9_225
Download citation
DOI: https://doi.org/10.1007/978-1-4020-6709-9_225
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-6707-5
Online ISBN: 978-1-4020-6709-9
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)