Preharvest UV-C radiation influences physiological, biochemical, and transcriptional changes in strawberry cv. Camarosa
2016
de Oliveira, Isadora Rubin | Crizel, Giseli Rodrigues | Severo, Joseana | Renard, Catherine, M.G.C. | Chaves, Fabio Clasen | Rombaldi, César Valmor | Universidade Federal de Pelotas ; Partenaires INRAE | Universidade Federal de Pelotas = Federal University of Pelotas (UFPel) | Instituto Federal Farroupilha | Sécurité et Qualité des Produits d'Origine Végétale (SQPOV) ; Avignon Université (AU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
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Show more [+] Less [-]English. Ultraviolet C (UV-C) radiation is known for preventing fungal decay and enhancing phytochemical content in fruit when applied postharvest. However, limited knowledge is available regarding fruit responses to preharvest application of UV-C radiation. Thus, the effects of UV-C radiation on photosynthetic efficiency, dry matter accumulation and partitioning, fruit yield and decay, phytochemical content, and relative transcript accumulation of genes associated with these metabolic pathways were monitored in strawberry (<em>Fragaria x ananassa</em> Duch.) cv. Camarosa. A reduction in photosynthetic efficiency was followed by a decrease in light harvesting complex <em>LhcIIb-1</em> mRNA accumulation as well as a decrease in yield per plant. Phenylalanine ammonia lyase activity, phenolic, anthocyanin, and L-ascorbic acid contents were higher in UV-C treated fruit. In addition, preharvest UV-C treatment reduced microorganism incidence in the greenhouse and on the fruit surface, increased the accumulation of <em>β-1,3-Gluc</em> and <em>PR-1</em> mRNA, and prevented fruit decay.
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