01907naa a2200289 a 450000100080000000500110000800800410001902200140006002400390007410000140011324501080012726000090023550001160024452010060036065000200136665000110138665300180139765300210141565300200143665300130145665300230146970000150149270000180150770000180152570000160154377300580155910128292019-10-09       2011    bl uuuu     u00u1 u    #d  a0304-42387 a10.1016/j.scienta.2010.11.0102DOI1 aRIVAS, F.  aChanges in carotenoids and ABA content in Citrus leaves in response to girdling.h[electronic resource]  c2011  aArticle history: Received 31 August 2010 / Received in revised form 11 October 2010 / Accepted 9 November 2010.  aABSTRACT.  The effect of girdling on abscisic acid, carotenoids content, xanthophylls cycle and non-photoquemical quenching was studied in leaves from different shoot types of containerized two-year-old 'Loretina' mandarin during spring flush period. Girdling increased abscisic acid in young leaves and decreased it in mature leaves. These changes were accompanied by a significant increase in leaf carotenoids, carotenoids:chlorophylls ratio, xanthophylls and xanthophylls cycle pool size and its de-epoxidation state in vegetative and multiflowered young leafy shoots. However, changes in de-epoxidation state did not correlate with the energy-dependent non-photochemical quenching. The role of carotenoids and abscisic acid as photoprotecting agents during the oxidative stress caused by girdling is discussed. In conclusion, this study provides evidence linking carotenoids-based photoprotecting mechanisms in the response to the stress induced by girdling in Citrus trees.  © 2010 Elsevier B.V.  aACIDO ABSCISICO  aCITRUS  aAbscisic acid  aOxidative stress  aPhotoprotection  aPigments  aXanthophylls cycle1 aFORNES, F.1 aRODRIGO, M.J.1 aZACARÍAS, L.1 aAGUSTÍ, M.  tScientia Horticulturae, 2011gv.127, no.4, p.482-487.