Main content area

Effect of preharvest aloe (Aloe vera L.) spray on physiological and quality attributes of strawberries during storage

Kafkaletou, M., Ouzounidou, G., Tsantili, E.
Acta horticulturae 2018 no.1194 pp. 105-112
2,2-diphenyl-1-picrylhydrazyl, Aloe vera, air, anthocyanins, antioxidant activity, calyx, citrates, color, firmness, fructose, fruit quality, fruits, gels, glucose, greenhouses, humans, malates, pH, plant development, strawberries, sucrose, titratable acidity, total soluble solids, weight loss
The present research aimed to evaluate the effects of preharvest aloe application on physiological and quality attributes of fruits during storage in air at 1°C with 95% RH for up to 9 days. 'Camarosa' strawberries were cultivated in a glasshouse according to integrated practices. Aloe (commercial gel for human consumption) sprays (diluted at 1:3 with water) were applied to plants one day before harvest, while controls were not sprayed. The attributes determined included weight loss, respiration, color parameters of fruit and calyx, fruit firmness, titratable acidity, pH, total soluble solids, phenolics, flavonoids, anthocyanins, antioxidant capacity (FRAP, DPPH) and concentration of ascorbate, malate, citrate, glucose, fructose and sucrose in fruit after 0, 3, 6 and 9 d storage. Visual evaluations for decay incidence and defects were also conducted on each sampling day. The results showed that aloe sprays reduced fruit weight loss, the incidence of decay, and fruit and calyx defects, while exhibited no effect on respiration and quality attributes determined apart from a minor decrease in DPPH and a slight increase in fruit C* at harvest. Decreases in firmness and in most color parameters in fruit and calyx were observed during storage. The overall good quality was observed in fruits stored for up to 6 d, while there was no effect on the subsequent plant development.