Blueberries with high anthocyanin content undergo various postharvest qualitative losses. In this work, eco-friendly coatings were developed for maintaining postharvest blueberry quality using lipopeptides (LPs), gelatin, and sodium carboxymethyl cellulose. The addition of LPs decreased the surface tension of coating film and thus exhibited lower water contact angle (95.53 ± 0.94°) than unmodified one (112.33 ± 0.73°). We demonstrated that LPs-modified coating not only extended the shelf life of blueberries by 12.5 % but also resulted in a reduction of 3.83 lg CFU/g in moulds and yeasts count compared to uncoated one. Furthermore, blueberries with higher anthocyanin content (75.75 mg 100 g) were recognized in LPs-modified coating treatment, which was further validated in anthocyanin biosynthesis genes expression through RT-qPCR. Our results demonstrate the effect of LPs-modified coating treatment on postharvest blueberry quality and anthocyanin biosynthesis genes expression. This work provides a promising strategy to produce biobased antimicrobial packaging system.
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