Short- and long-term modulation of the lutein epoxide and violaxanthin cycles in two species of the Lauraceae: sweet bay laurel (Laurus nobilis L.) and avocado (Persea americana Mill.)

Plant Biology
Raquel EstebanJosé I García-Plazaola

Abstract

Short- and long-term responses of the violaxanthin (V) and lutein epoxide (Lx) cycles were studied in two species of Lauraceae: sweet bay laurel (Laurus nobilis L.) and avocado (Persea americana L.). The Lx content exceeded the V content in shade leaves of both species. Both Lx and V were de-epoxidised on illumination, but only V was fully restored by epoxidation in low light. Violaxanthin was preferentially de-epoxidised in low light in L. nobilis. This suggests that Lx accumulates with leaf ageing, partly because its conversion to lutein is limited in shade. After exposure to strong light, shade leaves of avocado readjusted the total pools of alpha- and beta-xanthophyll cycles by de novo synthesis of antheraxanthin, zeaxanthin and lutein. This occurred in parallel with a sustained depression of F(v)/F(m). In Persea indica, a closely related but low Lx species, F(v)/F(m) recovered faster after a similar light treatment, suggesting the involvement of the Lx cycle in sustained energy dissipation. Furthermore, the seasonal correlation between non-reversible Lx and V photoconversions and pre-dawn F(v)/F(m) in sun leaves of sweet bay supported the conclusion that the Lx cycle is involved in a slowly reversible downregulation of pho...Continue Reading

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Mar 1, 2003·Functional Plant Biology : FPB·José I García-PlazaolaJosé M Becerril
Sep 1, 2006·Functional Plant Biology : FPB·Chang-Lian PengCheng-Xue Zhao
Aug 1, 2002·Functional Plant Biology : FPB·José I García-PlazaolaJosé M Becerril
Oct 1, 2002·Functional Plant Biology : FPB·Shizue MatsubaraC Barry Osmond

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Citations

Jul 10, 2012·Photosynthesis Research·José Ignacio García-PlazaolaAlbert Porcar-Castell
May 22, 2010·Physiologia Plantarum·Raquel EstebanJosé I García-Plazaola
Nov 20, 2014·The New Phytologist·Christopher Y S Wong, John A Gamon
Oct 2, 2009·Plant Signaling & Behavior·Raquel EstebanJosé Ignacio García-Plazaola
Jan 1, 2009·Functional Plant Biology : FPB·Shizue MatsubaraKlaus Winter

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