Respuesta de la aplicación exógena de melatonina en la calidad de frutos de arándano durante las fases de precosecha y postcosecha.
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Date
2025
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
Este estudio evaluó el efecto de la aplicación de melatonina de forma exógena sobre la calidad de frutos de arándano (Vaccinium ashei Reade) `Ochlockonee´, comparando su aplicación en los escenarios de precosecha (en planta) y postcosecha (fruto cosechado). En los ensayos, se evaluó firmeza, tamaño, sólidos solubles, acidez titulable, pH, polifenoles totales y capacidad antioxidante (DPPH) en los frutos, tanto al momento de la cosecha (D0), como luego de 50 días de almacenamiento en frío (D50). Los frutos sometidos al tratamiento con melatonina presentaron mayor firmeza en el D0 en comparación con los controles (77 shore con melatonina, 73 shore con Tween 20 y 67 shore con agua), mientras que al D50 destacó la firmeza del tratamiento con melatonina en postcosecha respecto a los controles (55 shore con melatonina; 49 shore con Tween 20; 46 shore con agua). Además, al día de cosecha los frutos tratados con melatonina presentaron una mayor concentración de polifenoles totales (182 mg / 100 g) y capacidad antioxidante (16,23 μmol / g). Aunque los efectos a largo plazo de las aplicaciones en precosecha y postcosecha fueron similares, la aplicación en precosecha se posiciona como la opción más ventajosa por reducir la manipulación posterior a la cosecha, alineándose con las demandas del mercado actual. Así, la aplicación exógena de melatonina representa una herramienta prometedora para mejorar la calidad, vida útil y valor nutricional de los frutos de arándanos.
This study evaluated the effect of exogenous melatonin application on the fruit quality of blueberry (Vaccinium ashei Reade) ‘Ochlockonee’, comparing its application in preharvest (on-plant) and postharvest (harvested fruit) scenarios. The trials assessed firmness, size, soluble solids, titratable acidity, pH, total polyphenols, and antioxidant capacity (DPPH) in the fruits both at harvest (D0) and after 50 days of cold storage (D50). Fruits treated with melatonin showed higher firmness at D0 compared to controls (77 shore with melatonin, 73 shore with Tween 20, and 67 shore with water), while at D50 firmness was higher in the postharvest melatonin treatment compared to controls (55 shore with melatonin; 49 shore with Tween 20; 46 shore with water). Additionally, at harvest, melatonin-treated fruits exhibited greater total polyphenol content (182 mg / 100 g) and antioxidant capacity (16.23 μmol / g). Although the long-term effects of preharvest and postharvest applications were similar, preharvest application is positioned as the more advantageous option due to reduced handling after harvest, aligning with current market demands. Thus, exogenous melatonin application represents a promising tool to improve the quality, shelf life, and nutritional value of blueberry fruits.
This study evaluated the effect of exogenous melatonin application on the fruit quality of blueberry (Vaccinium ashei Reade) ‘Ochlockonee’, comparing its application in preharvest (on-plant) and postharvest (harvested fruit) scenarios. The trials assessed firmness, size, soluble solids, titratable acidity, pH, total polyphenols, and antioxidant capacity (DPPH) in the fruits both at harvest (D0) and after 50 days of cold storage (D50). Fruits treated with melatonin showed higher firmness at D0 compared to controls (77 shore with melatonin, 73 shore with Tween 20, and 67 shore with water), while at D50 firmness was higher in the postharvest melatonin treatment compared to controls (55 shore with melatonin; 49 shore with Tween 20; 46 shore with water). Additionally, at harvest, melatonin-treated fruits exhibited greater total polyphenol content (182 mg / 100 g) and antioxidant capacity (16.23 μmol / g). Although the long-term effects of preharvest and postharvest applications were similar, preharvest application is positioned as the more advantageous option due to reduced handling after harvest, aligning with current market demands. Thus, exogenous melatonin application represents a promising tool to improve the quality, shelf life, and nutritional value of blueberry fruits.
Description
Tesis presentada para optar al título de Ingeniero/a Agrónomo/a.
Keywords
Melatonina, Arándano Cultivo, Antioxidantes