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Journal of Agriculture ›› 2022, Vol. 12 ›› Issue (10): 35-43.doi: 10.11923/j.issn.2095-4050.cjas2021-0135

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Application of Kadsura longipedunculata Lignan Compound Coating Solution in Strawberry Preservation

XU Yucong(), ZHANG Yanna, ZHANG Xiaohu(), CHEN Yuexing, WU Xu   

  1. College of Biology Pharmacy and Food Engineering, Shangluo University/ Shaanxi Qinling Industrial Technology Research Institute of Special Biological Resources, Shangluo 726000, Shaanxi, China
  • Received:2021-07-29 Revised:2022-03-14 Online:2022-10-20 Published:2023-01-05
  • Contact: ZHANG Xiaohu E-mail:728670537@qq.com;zxh5462@163.com

Abstract:

Strawberry is easy to be damaged and spoilt by pathogenic microorganisms during harvesting, storage and transportation, which could affect its commercial value. To study the effects of lignan compound coating solution of Kadsura longipedunculata on the fresh-keeping of strawberry, the lignan was extracted from K. longipedunculata by ultrasonic-assisted ethanol extraction. Taking the diameter of inhibition zone as the index, the antibacterial effects of the lignan extraction on three tested bacteria were investigated. The antibacterial effect order from strong to weak was on Escherichia coli> Salmonella> Staphylococcus aureus. The effects of lignan, sodium copper chlorophyllin, konjac glucomannan and calcium chloride on the weight loss rate, soluble solid content and Vc content of strawberry were analyzed. On the basis of single factor experiments, response surface optimization experiment was carried out. The optimal formula of compound coating solution was as follows: 0.32% lignan extraction+ 0.0021% sodium copper chlorophyllin+0.27% konjac glucomannan+ 1.0% calcium chloride. The compound coating solution was applied to strawberry storage experiment, the weight loss rate of strawberry decreased by 73.86%, soluble solid content increased by 67.55%, Vc content increased by 21.80%. The preservation effect was obviously better compared with that of the control group. The results in this study can provide technical reference for strawberry preservation.

Key words: Kadsura longipedunculata, lignan, antibacterial effect, compound coating solution, strawberry, response surface methodology

CLC Number: