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https://hdl.handle.net/1822/70589
Título: | Vineyard calcium sprays reduce the damage of postharvest grape berries by stimulating enzymatic antioxidant activity and pathogen defense genes, despite inhibiting phenolic synthesis |
Autor(es): | Martins, Viviana Soares, Cristiano Spormann, Sofia Fidalgo, Fernanda Gerós, H. |
Palavras-chave: | catalase cell wall genes fruit decay pathogen response PAL1 secondary metabolism |
Data: | Mai-2021 |
Editora: | Elsevier 1 |
Revista: | Plant Physiology and Biochemistry |
Citação: | Martins, Viviana; Soares, Cristiano; Spormann, Sofia; Fidalgo, Fernanda; Gerós, Hernâni, Vineyard calcium sprays reduce the damage of postharvest grape berries by stimulating enzymatic antioxidant activity and pathogen defense genes, despite inhibiting phenolic synthesis. Plant Physiology and Biochemistry, 162, 48-55, 2021 |
Resumo(s): | Calcium supplements have been increasingly used for decay prevention, sanitation and nutritional enrichment of fruits, as more environmentally friendly alternatives to fungicides. However, little is known on the effects of these supplements on grape berry biochemical and molecular properties during storage. In this study, we addressed the hypothesis that the application of calcium chloride (CaCl2) in grapevines throughout the fruiting season reduces damage (and decay) of postharvest grape berries, through several biochemical and transcriptional modifications in sugar transport, secondary metabolism, antioxidant activity, cell wall organization and pathogen defense. Results showed that calcium (Ca) treatments in cv. Vinhão vines increased fruit Ca content and significantly decreased fruit damage by 60%, 10-d after storage at 4 °C. Grape berries from Ca-treated vines displayed lower levels of total phenolics and anthocyanins, compared to control fruits, corroborating the downregulation of PAL1 and STS which resulted in decreased non-enzymatic antioxidant capacity estimated by FRAP assay. In contrast, a strong upregulation of CAT1, ASPX1, ASPX3, GLPX1, CSD3 and CSD6 encoding antioxidant enzymes was observed. Accordingly, catalase enzyme activity was stimulated, significantly reducing hydrogen peroxide (H2O2) levels by 36%. The overexpression of the cell wall and pathogen defense genes PME, PGIP, PIN and PR1 likely contributed to the reduction in fruit rot. This work suggested that preharvest Ca treatment is an efficient agronomical strategy that prolongs the shelf life of grape berries through modifications at molecular and biochemical levels, bringing further insight on the benefits and drawbacks of preharvest Ca applications on postharvest fruit quality attributes. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/70589 |
DOI: | 10.1016/j.plaphy.2021.02.025 |
ISSN: | 0981-9428 |
Versão da editora: | https://www.sciencedirect.com/science/article/abs/pii/S0981942821000929 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series CBMA - Artigos/Papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_54241_1.pdf Acesso restrito! | 3,2 MB | Adobe PDF | Ver/Abrir |