Articles
EFFECT OF CITRIC ACID AND STORAGE CONDITIONS ON THE RESPIRATION RATE OF ‘WONDERFUL’ POMEGRANATE ARILS
Article number
1079_63
Pages
481 – 486
Language
English
Abstract
Optimum postharvest pre-treatments and storage conditions play a significant role in retarding physiological responses and disorders as well as extending the shelf life of minimally processed fruit and vegetables.
This study investigated the effect of citric acid (10 g/L) pre-treatment and storage temperatures (5, 10, 15 and 20±2°C) on the respiration rate (RR) of minimally processed Wonderful pomegranate arils during 5 d of storage.
Arils were dipped in citric acid for 1 min and respiration study was conducted using the closed system method.
Physicochemical (colour, total soluble solids (TSS), titratable acidity (TA) and pH) attributes of arils were evaluated initially and after 5 d of storage in jars.
Storage temperature and the interaction of temperature, citric acid and storage time had a significant influence on RR. Across all treatments, CO2 respiration rate (RCO2) increased from 2.8-28.3 ml/kg h, while O2 respiration rate (RO2) increased from 2.6-27.2 ml/kg h.
Storage temperature and time influence the respiratory quotient (RQ) of pomegranate arils.
The RQ values ranged from 0.9-1.24 for both treated and non-treated arils.
Significant changes were observed in redness of citric treated arils at 5 and 10°C, while a significant decrease in TA and TSS after 5 d of storage was monitored.
However, TSS:TA ratio increased slightly across all the treatments.
Low temperature combined with citric acid treatment was effective in retarding RR and maintaining quality attributes of pomegranate arils for 5 d.
This study investigated the effect of citric acid (10 g/L) pre-treatment and storage temperatures (5, 10, 15 and 20±2°C) on the respiration rate (RR) of minimally processed Wonderful pomegranate arils during 5 d of storage.
Arils were dipped in citric acid for 1 min and respiration study was conducted using the closed system method.
Physicochemical (colour, total soluble solids (TSS), titratable acidity (TA) and pH) attributes of arils were evaluated initially and after 5 d of storage in jars.
Storage temperature and the interaction of temperature, citric acid and storage time had a significant influence on RR. Across all treatments, CO2 respiration rate (RCO2) increased from 2.8-28.3 ml/kg h, while O2 respiration rate (RO2) increased from 2.6-27.2 ml/kg h.
Storage temperature and time influence the respiratory quotient (RQ) of pomegranate arils.
The RQ values ranged from 0.9-1.24 for both treated and non-treated arils.
Significant changes were observed in redness of citric treated arils at 5 and 10°C, while a significant decrease in TA and TSS after 5 d of storage was monitored.
However, TSS:TA ratio increased slightly across all the treatments.
Low temperature combined with citric acid treatment was effective in retarding RR and maintaining quality attributes of pomegranate arils for 5 d.
Publication
Authors
K. Banda, O.J. Caleb, U.L. Opara
Keywords
Punica granatum, respiratory quotient, citric acid treatment, postharvest
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