عنوان مقاله [English]
Effects of Aloe vera Gel and Storage Duration on Some Biochemical Indices in Minimally Processed Pomegranate Fresh Arils
Background and Objectives: The effect of different physical and chemical treatments on quality of pomegranate fruit at the postharvest has been studied, but there is limited information in the case of pomegranate fresh aril postharvestc as a ready- to- eat produce. Coating is one of the treatments to maintain the postharvest quality of the pomegranate fresh aril. Because, the health of the consumer in the selection of postharvest treatment is important, use of compounds that extracted from plants as wax or coating agent is a safe treatment for fresh arils. Gel that extracted from leaf tissue of Aloe vera L. is a herbal gel that can be used as coating agent. The objective of the present experiment was to evaluate the effects of Aloe vera gel on postharvest quality of pomegranate fresh arils.
Materials and methods: Pomegranate Fruits (‘Malas Poost Zard’) were harvested from a commercial orchard located in ‘Bagmalek’ (Khuzestan Province). Fresh arils were removed manually from fruits and treated with Aloe vera gel (0, 2.5, 5 and 10%). Fresh arils were stored at 7 oC, RH= 90% for 4, 8 and 12 days. Some biochemical characteristics (ascorbic acid, total soluble solids, titratable acidity, total phenolics, color intensity, anthocyanins and browning index) were evaluated.
Results: Results showed that interaction of Aloe vera gel concentration and storage duration had a significant effect on ascorbic acid, titratable acidity, total phenolics, color intensity, anthocyanins and browning index. The effect of Aloe vera gel concentration on total soluble solids and anthocyanins/browning ratio. Quality of pomegranate fresh arils was significantly decreased with increasing in duration of storage. During storage condition of fresh arils, Aloe vera gel (2.5 – 5%) improved the color intensity of fresh arils after 4 days. Also, results showed that all concentrations of Aloe vera gel helped to maintain higher ascorbic acid after 8 and 12 days.
Discussion: Results showed quality of pomegranate fresh arils that coated with Aloe vera gel respond significantly to storage duration. Aloe vera gel improved quality of pomegranate fresh arils. Aloe vera gel contains the different antioxidant and nutrients which may be responsible for the positive effects on quality of pomegarnate arils. Results showed that Aloe vera gel is a promising herbal product to coating pomegranate fresh arils and more research needs to be undertaken to efficacy of Aloe vera gel on postharvest quality of pomegranate fresh arils and other minimally processed product.