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. 2019 Nov 9;8(11):564.
doi: 10.3390/foods8110564.

Effects of Passive- and Active-Modified Atmosphere Packaging on Physio-Chemical and Quality Attributes of Fresh In-Hull Pistachios (Pistacia vera L. cv. Badami)

Abdollatif Sheikhi  1   2 , Seyed Hossein Mirdehghan  1 , Hamid Reza Karimi  1 , Louise Ferguson  2
Affiliations

Effects of Passive- and Active-Modified Atmosphere Packaging on Physio-Chemical and Quality Attributes of Fresh In-Hull Pistachios (Pistacia vera L. cv. Badami)

Abdollatif Sheikhi et al. Foods. .

Abstract

The effects of passive- and active-modified atmosphere packaging (passive- and active-MAP) were investigated on the physio-chemical and quality attributes of fresh in-hull pistachios stored at 4 ± 1 °C and 90 ± 5% R.H. Fresh pistachios were packaged under each of the following gas combinations: active-MAP1 (AMA1) (5% O2 + 5% CO2), AMA2 (5% O2 + 25% CO2), AMA3 (5% O2 + 45% CO2), AMA4 (2.5% O2 + 5% CO2), AMA5 (2.5% O2 + 25% CO2), and AMA6 (2.5% O2 + 45% CO2), all balanced with N2, as well as passive-MAP (PMA) with ambient air (21% O2 + 0.03% CO2 + 78% N2). Changes in quality parameters were evaluated after 0, 15, 30 and 45 days of storage. Results demonstrated that AMA6 and PMA had significantly lower (7.96 Log CFU g-1) and higher (9.81 Log CFU g-1) aerobic mesophilic bacteria counts than the other treatments. However, the AMA6 treatment decreased, kernel chlorophyll and carotenoid content, hull antioxidant capacity, and anthocyanin content. The PMA treatment produced a significant weight loss, 0.18%, relative to the other treatments. The active-MAP treatments were more effective than the passive-MAP in decreasing weight loss, microbial counts, kernel total chlorophyll (Kernel TCL), and kernel carotenoid content (Kernel CAC). The postharvest quality of fresh in-hull pistachios was maintained best by the AMA3 (5% O2 + 45% CO2 + 50% N2) treatment.

Keywords: active-modified atmosphere packaging; anthocyanin; antioxidant enzyme; fresh pistachio; microbial counts; postharvest quality.

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Conflict of interest statement

Authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Effect of different active-modified atmosphere packaging (active-MAP) and passive-MAP conditions on weight loss (A) through the 45 days of storage, and microbial counts (B) at the end of storage of fresh in-hull pistachios stored at 4 ± 1 °C and 90 ± 5% relative humidity (R.H.). Means followed by the same letter for a parameter, are not significantly different by least significant differences (LSD) (p ≤ 0.05). Vertical bars indicate the standard errors of four replicates.
Figure 2
Figure 2
Effect of different active-MAP and passive-MAP conditions on total anthocyanins (TAC) in the kernel’s skin of fresh in-hull pistachios stored for 45 days at 4 ± 1 °C and 90 ± 5% R.H. Means followed by the same letter for a parameter, are not significantly different according to the LSD (p ≤ 0.05). Vertical bars indicate the standard errors of four replicates.
See this image and copyright information in PMC

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