Food and Fermentation Industries >

2026 , Vol. 52 >Issue 11: 310 - 321

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.044292

Effect of sodium alginate coating loaded with Bacillus subtilis on the post-harvest quality of pomelos

  • ZHUANG Weiran ,
  • ZHU Xiaoyi ,
  • ZHANG Yumei ,
  • YANG Yi ,
  • FANG Weirui ,
  • WU Jing ,
  • WU Qiumei ,
  • LIU Kunlin ,
  • YI Chengjing ,
  • LIU Yaowen
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  • (College of Food Science, Sichuan Agricultural University, Ya’an 625000, China)

Received date: 2025-08-21

  Revised date: 2025-10-24

  Online published: 2026-06-24

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Abstract

Long’an pomelos are susceptible to pathogen infection after harvest, and traditional chemical agents are not effective in preserving them.In order to extend the storage life of Long’an pomelos, this experiment loaded Bacillus subtilis into edible coatings of different concentrations and substances to determine their performance, screened out the most suitable coating solution, and applied it to the storage and preservation of Long’an pomelos.The results shows that 2.0% sodium alginate (SA) is the most suitable coating for B.subtilis, and the optimal antibacterial concentration of B.subtilis is 1×108 CFU/mL.The B. subtilis/SA coating solution effectively reduces water vapor permeability to (3.22±0.19) g·mm/(m2·d·kPa) and increases elongation at break to (3.56±0.23)%.Furthermore, the coating demonstrates excellent preservation properties.At day 90, the B.subtilis/SA coating-treated group exhibits the highest hardness (18.62±0.55) N and the lowest weight loss rate (7.6±0.91)%, with the smallest decreases in soluble solids and titratable acid content, decreasing by (2.25±0.3)%, (0.17±0.01) mg/g, respectively, indicating that the coating can slow down the deterioration of the fruit.The Long’an pomelo treated with B.subtilis/SA coating shows a slow decline in flavonoids and lycopene during storage, reaching (3.07±0.16) OD325/g FW and (0.11±0.01) OD502/g FW, respectively.with small increases in malondialdehyde (21.37±2.48) mmol/g and lignin (0.16±0.02) OD502/g FW, thereby enhancing the antioxidant capacity of Long’an pomelos and extending their post-harvest storage period from 30 days to 90 days.In summary, the B.subtilis/SA edible coating solution prepared in this study ensures the post-harvest storage and preservation quality of Long’an pomelos, providing a reference for improving the preservation effect of Long’an pomelos.

Key words： Long’an pomelo; biological control; edible coating film; fruit resistance

Cite this article

ZHUANG Weiran , ZHU Xiaoyi , ZHANG Yumei , YANG Yi , FANG Weirui , WU Jing , WU Qiumei , LIU Kunlin , YI Chengjing , LIU Yaowen . Effect of sodium alginate coating loaded with Bacillus subtilis on the post-harvest quality of pomelos[J]. Food and Fermentation Industries, 2026 , 52(11) : 310 -321 . DOI: 10.13995/j.cnki.11-1802/ts.044292

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