Artículo
Short-term UV-B exposure induces metabolic and anatomical changes in peel of harvested lemons contributing in fruit protection against green mold
Ruiz, Verónica Eugenia
; Interdonato, Osvaldo Roque; Cerioni, Luciana
; Albornoz, Patricia Liliana; Ramallo, J.; Prado, Fernando Eduardo
; Hilal, Mirna Beatriz; Rapisarda, Viviana Andrea
Fecha de publicación:
01/2016
Editorial:
Elsevier Science Sa
Revista:
Journal of Photochemistry and Photobiology B: Biology
ISSN:
1011-1344
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
UV-B radiation (UVBR) is a small fraction of the solar spectrum from 280 to 315 nm. UVBR produces photomorphogenic acclimation responses in plants, modulating their cellular structure and physiology. Here, changes in the peel of harvested lemons after short time exposure to UVBR were analyzed and its potential effects against fungal infection were studied. In the flavedo, UVBR treatment induced variations in the respiratory profiles and increased the phenolic compound contents. Final products of the flavonoid pathway (flavones, flavonols and anthocyanins) increased more markedly than their precursors (flavanones and dihydroflavonols). The increased accumulation of soluble phenolics in the flavedo of treated lemons is associated with the high antioxidant activity found in the flavedo of these samples. Supporting the biochemical determinations, anatomical observations showed abundant intravacuolar deposits of phenolic compounds and an increase in the cell wall thickness in UVBR-treated samples. Metabolic and anatomical modifications associated to UVBR improved natural defenses against Penicillium digitatum, the causal agent of green mold disease. Our results suggest that mature postharvest lemons exposed to the artificial radiation showed phenotypic plasticity, allowing an acclimation response to UVBR which confers fruit resistance to pathogens. Thus, combination of UVBR with other treatments could represent an important improvement to control postharvest diseases on citrus.
Palabras clave:
Citrus
,
Penicillium Digitatum
,
Phenolic Compounds
,
Postharvest
,
Uv-B Radiation
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - NOA SUR)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos(INSIBIO)
Articulos de INST.SUP.DE INVEST.BIOLOGICAS
Articulos de INST.SUP.DE INVEST.BIOLOGICAS
Citación
Ruiz, Verónica Eugenia; Interdonato, Osvaldo Roque; Cerioni, Luciana; Albornoz, Patricia Liliana; Ramallo, J.; et al.; Short-term UV-B exposure induces metabolic and anatomical changes in peel of harvested lemons contributing in fruit protection against green mold; Elsevier Science Sa; Journal of Photochemistry and Photobiology B: Biology; 159; 1-2016; 59-65
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