Modelling the respiration rates of pomegranate fruit and arils
Date
2012-02
Authors
Caleb, Oluwafemi James
Mahajan, Pramod V.
Opara, Umezuruike Linus
Witthuhn, Corli R.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The design of modified atmosphere packaging (MAP) for fresh and fresh-cut fruit requires adequate
prediction of respiration rates (RRs). A study was conducted to determine the influences of storage temperature
(5, 10 and 15 ◦C) and duration on RR of whole pomegranate fruit and arils of two pomegranate
cultivars (‘Acco’ and ‘Herskawitz’). The RR of whole fruit was two to three folds higher, in comparison to
those of the fresh arils across all storage temperatures. Temperature had a significant influence on RR.
Over the range of storage temperatures studied, RO2 and RCO2 increased from 4.53 to 14.67 mL/kg h and
5.67 to 18.53 mL/kg h, respectively, for whole fruit, while RO2 and RCO2 of fresh arils ranged from 2.51
to 7.59 mL/kg h and 2.72 to 9.01 mL/kg h, respectively. The cultivar ‘Acco’ had higher respiration rates
(mL/kg h CO2 production) than ‘Herskawitz’, especially as the length of storage increased at higher temperature
conditions. The respiration quotient (RQ) for the whole fruit of both cultivars ranged from 1.14 to
1.26, while that of fresh arils ranged between 1.06 and 1.62. Experimental evidence showed that the significant
influence of higher temperature in increasing the RQ of pomegranate arils was more pronounced
towards the end of the storage period. The effects of temperature on rates of O2 consumption and CO2
production of whole fruit and arils were adequately described by an Arrhenius type model. The model
was validated for whole fruit stored at 8 ◦C, and a good agreement was found between experimental and
predicted data.
Description
The original publication is available at http://www.sciencedirect.com/
Keywords
Respiration model, Fresh and fresh-cut fruit -- Postharvest technology, Modified atmosphere packaging
Citation
Caleb, O. J, Mahajan, p. V., Opara, U. L. & Witthuhn. 2012. Modelling the respiration rates of pomegranate fruit and arils. Postharvest Biology and Technology, 64(1), 49-54, doi:10.1016/j.postharvbio.2011.09.013.