Effects of salicylic acid combined with gas atmospheric control on postharvest quality and storage stability of wolfberries: Quality attributes and interaction evaluation

Abstract

Wolfberry (Lycium barbarum) is abundant in bioactive substances but prone to rapid deterioration after harvest, and thus wolfberry is usually dried. However, drying of wolfberry requires high energy consumption and can normally lower wolfberry bioactive contents. Cold storage, edible coating, and modified atmosphere packaging have been developed to preserve wolfberry but scarce data are available on postharvest quality and storage stability. In particular, the combined effects of salicylic acid (SA) and control atmosphere (CA) on wolfberry quality have not been investigated. In the current study, SA and gas atmospheric control were applied either separately or in combination to explore changes in physiochemical properties during storage. Results showed that color quality and weight loss (WL) were the main indicators of quality change during storage, with high color quality and low WL representing excellent quality. SA and hypoxia (controlled and modified atmosphere conditions) could synergistically suppress respiration rate and antagonistically maintain ascorbic acid (AsA) and color quality, while SA could alleviate physiological disorder. Principal component analysis and cluster analysis verified that CA and SA + CA were excellent in enhancing the stability during storage and exhibited minimal quality deterioration. Thus, combining SA and gas atmospheric control could serve as a potential postharvest hurdle technology for preserving wolfberry.

Controlled atmosphere maintains the quality of certain fresh produce in mixed cargo shipments

“…Despite the effectiveness of CA storage in many fruits (Fahmy & Nakano, 2016; Paniagua et al, 2014), it was not effective in this study. There are many reports on CA storage (Forney et al, 2022; Xiang et al, 2021); however, most of them have higher carbon dioxide and lower oxygen concentrations than those used in the present study (carbon dioxide and oxygen were both 5%). However, it has also been shown that the optimal CA conditions vary considerably based on the type of produce (Gross et al, 2018), and even within the same type, the response varies with ripening stage (Fernández‐Cancelo et al, 2022).…”

“…was not effective in this study. There are many reports on CA storage (Forney et al, 2022;Xiang et al, 2021); however, most of them have higher carbon dioxide and lower oxygen concentrations than those used in the present study (carbon dioxide and oxygen were both 5%).…”

Combined Effects of Radiative and Evaporative Cooling on Fruit Preservation under Solar Radiation: Sunburn Resistance and Temperature Stabilization

“…After sun exposure, the blank (Figure c) exhibited the greatest migration distances in both PC1 and PC2 (ΔPC1 = 2.73, ΔPC2 = 1.52), while NPs/NADES@PAAm/PVA (Figure f) displayed the lowest migration distances in both PC1 and PC2 (ΔPC1 = 0.12, ΔPC2 = 0.04), and since greater values of ΔPC1 and ΔPC2 suggested a more severe quality loss, NPs/NADES@PAAm/PVA endowed the pear with the best quality stabilization after sun exposure. Unlike PCA, hierarchical cluster analysis (HCA) can be used to treat the high-dimensional data matrix by ignoring the category of samples . The HCA consisting of a heatmap of variable values and a dendrogram of the clustering result is shown in Figure c, and four groups of the pear were mainly clustered into two big groups: fresh pear and pear treated with NPs/NADES@PAAm/PVA after sun exposure in the first group, while pear treated with PAAm/PVA or Al-EPE after sun exposure in the second group.…”

“…Unlike PCA, hierarchical cluster analysis (HCA) can be used to treat the highdimensional data matrix by ignoring the category of samples. 46 The HCA consisting of a heatmap of variable values and a dendrogram of the clustering result is shown in Figure 5c, and four groups of the pear were mainly clustered into two big groups: fresh pear and pear treated with NPs/NADES@ PAAm/PVA after sun exposure in the first group, while pear treated with PAAm/PVA or Al-EPE after sun exposure in the second group. Although there was an NPs/NADES@PAAm/ PVA group clustered in the second group, it was observed that the data of the Al-EPE and PAAm/PVA groups were merged first, and the data of the NPs/NADES@PAAm/PVA group were finally integrated into the same cluster.…”

Chemical and Biological Properties of Three Poorly Studied Species of Lycium Genus—Short Review

“…For example, Ban et al [21] reported that the combination of pre-storage heat treatment and a chitosan coating lowers decay compared with untreated wolfberry fruits, and maintains higher levels of ascorbic acid, total phenolic contents and antioxidant capacity. More recently, Xiang et al [22] observed that the combination of salicylic acid and hypoxia (controlled and modified atmosphere conditions) could synergistically suppress respiration rate and antagonistically maintain ascorbic acid and color quality, while salicylic acid could alleviate physiological disorder. Liang et al [8] found that 10% CO 2 better maintained the physiological quality and conferred the reduction in weight loss of wolfberries, decay index, color change, and antioxidant activity enhancement.…”