Changes in carotenoids and ABA content in Citrus leaves in response to girdling |
| |
| Authors: | F Rivas F Fornes MJ Rodrigo L Zacarías M Agustí |
| |
| Institution: | 1. Instituto Nacional de Investigación Agropecuaria (INIA), Ruta 3, Camino al Terrible, E-60038 Salto, Uruguay;2. Instituto Agroforestal Mediterráneo (IAM), Universidad Politécnica de Valencia, Camino de Vera s/n, E-46022 Valencia, Spain;3. Instituto de Agroquímica y Tecnología de Alimentos (IATA)-CSIC, Apartado de Correos 73, Burjassot, E-46100 Valencia, Spain |
| |
| Abstract: | 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. |
| |
| Keywords: | Abscisic acid Oxidative stress Photoprotection Pigments Xanthophylls cycle |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
