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Wang, Yifei; Chen, Jiahao; Bian, Wenyi; Yang, Xiaobo; Ye, Lin; He, Shoukui; Song, Xiaoqiu
Molecules (Basel, Switzerland), 11/2022, Volume: 27, Issue: 22Journal Article
Salicylic acid (SA) is a natural inducer of disease resistance in fruit, but its application in the food industry is limited due to low water solubility. Here, SA was encapsulated in β-cyclodextrin (β-CD) via the host-guest inclusion complexation method, and the efficacy of SA microcapsules (SAM) against blue mold caused by in postharvest apple fruit was elucidated. It was observed that SAM was the most effective in inhibiting the mycelial growth of in vitro. SAM was also superior to SA for control of blue mold under in vivo conditions. Enzyme activity analysis revealed that both SA and SAM enhanced the activities of superoxide dismutase (SOD) and phenylalanine ammonia lyase (PAL) in apple fruit, whereas SAM led to higher SOD activities than SA. Total phenolic contents in the SAM group were higher than those in the SA group at the early stage of storage. SAM also improved fruit quality by retarding firmness loss and maintaining higher total soluble solids (TSS) contents. These findings indicate that microcapsules can serve as a promising formulation to load SA for increasing inhibition activity and improving quality attributes in apple fruit.
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