title: Distinct physiological and metabolic reprogramming by highbush blueberry (Vaccinium corymbosum) cultivars revealed during long-term UV-B radiation.
abstract: Despite the Montreal protocol and the eventual recovery of the ozone layer over Antarctica, there are still concerns about increased levels of ultraviolet-B (UV-B) radiation in the Southern Hemisphere. UV-B induces physiological, biochemical and morphological stress responses in plants, which are species-specific and different even for closely related cultivars. In woody plant species, understanding of long-term mechanisms to cope with UV-B-induced stress is limited. Therefore, a greenhouse UV-B daily course simulation was performed for 21 days with two blueberry cultivars (Legacy and Bluegold) under UV-BBEirradiance doses of 0, 0.07 and 0.19 W m-2. Morphological changes, photosynthetic performance, antioxidants, lipid peroxidation and metabolic features were evaluated. We found that both cultivars behaved differently under UV-B exposure, with Legacy being a UV-B-resistant cultivar. Interestingly, Legacy used a combined strategy: initially, in the first week of exposure its photoprotective compounds increased, coping with the intake of UV-B radiation (avoidance strategy), and then, increasing its antioxidant capacity. These strategies proved to be UV-B radiation dose dependent. The avoidance strategy is triggered early under high UV-B radiation in Legacy. Moreover, the rapid metabolic reprogramming capacity of this cultivar, in contrast to Bluegold, seems to be the most relevant contribution to its UV-B stress-coping strategy.
authors.affiliation: Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, 54-D, Chile.|Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, 54-D, Chile.
authors.forename: Ana
authors.initials: A
authors.lastname: Luengo Escobar
authors.affiliation: Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, 54-D, Chile.|Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, 54-D, Chile.
authors.forename: Miren
authors.initials: M
authors.lastname: Alberdi
authors.affiliation: Departamento de Física, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, 54-D, Chile.|Center for Optics and Photonics, Universidad de Concepción, Concepción, 4012, Chile.
authors.forename: Patricio
authors.initials: P
authors.lastname: Acevedo
authors.affiliation: Max Planck Partner Group at Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa-Minas Gerais, 36570-900, Brazil.
authors.forename: Mariana
authors.initials: M
authors.lastname: Machado
authors.affiliation: Max Planck Partner Group at Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa-Minas Gerais, 36570-900, Brazil.
authors.forename: Adriano
authors.initials: A
authors.lastname: Nunes-Nesi
authors.affiliation: Núcleo de Investigación en Producción Alimentaría, Facultad de Recursos Naturales, Escuela de Agronomía, Universidad Católica de Temuco, Temuco, 56-D, Chile.
authors.forename: Claudio
authors.initials: C
authors.lastname: Inostroza-Blancheteau
authors.affiliation: Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Temuco, 54-D, Chile.|Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, 54-D, Chile.
authors.forename: Marjorie
authors.initials: M
authors.lastname: Reyes-Díaz
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D029798:Blueberry Plants / Q000378:metabolism* / Q000528:radiation effects; D018506:Gene Expression Regulation, Plant / Q000235:genetics / Q000528:radiation effects; D010788:Photosynthesis / Q000235:genetics / Q000528:radiation effects; D018515:Plant Leaves / Q000378:metabolism* / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D000975:Antioxidants