Application of Dynamic Controlled Atmosphere Technologies to Reduce Incidence of Physiological Disorders and Maintain Quality of ‘Granny Smith’ Apples

Tatenda Gift Kawhena, Olaniyi Amos Fawole and Umezuruike Linus Opara
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Tatenda Gift Kawhena: Department of Horticultural Science, Faculty of AgriSciences, Stellenbosch University, Stellenbosch 7600, South Africa
Olaniyi Amos Fawole: SARChI Postharvest Technology Research Laboratory, Africa Institute for Postharvest Technology, Faculty of AgriSciences, Stellenbosch University, Stellenbosch 7600, South Africa
Umezuruike Linus Opara: SARChI Postharvest Technology Research Laboratory, Africa Institute for Postharvest Technology, Faculty of AgriSciences, Stellenbosch University, Stellenbosch 7600, South Africa

Agriculture, 2021, vol. 11, issue 6, 1-24

Abstract: The efficacy of dynamic controlled atmosphere technologies; repeated low oxygen stress (RLOS) and dynamic controlled atmosphere-chlorophyll fluorescence (DCA-CF) to control superficial scald development on ‘Granny Smith’ apples during long-term storage was studied. Fruit were stored for 2, 4, 6, 8, and 10 months at 0 °C in DCA-CF (0.6% O 2 and 0.8% CO 2 ), regular atmosphere (RA)(≈21% O 2 and 90–95% RH), and RLOS treatments: (1) 0.5% O 2 for 10 d followed by ultra-low oxygen (ULO) (0.9% O 2 and 0.8% CO 2 ) for 21 d and 0.5% O 2 for 7 d or (2) 0.5% O 2 for 10 d followed by controlled atmosphere (CA) (1.5% O 2 and 1% CO 2 ) for 21 d and 0.5% O 2 for 7 d. Development of superficial scald was inhibited for up to 10 months and 7 d shelf life (20 °C) under RLOS + ULO and DCA-CF treatments. Apples stored in RLOS + ULO, RLOS + CA, and DCA-CF had significantly ( p < 0.05) higher flesh firmness and total soluble solids. The RLOS phases applied with CA or ULO and DCA-CF storage reduced the development of superficial scald by possibly suppressing the oxidation of volatiles implicated in superficial scald development.

Keywords: chlorophyll; fluorescence; storage atmosphere; superficial scald (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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