Effect of ginger extract on sweet potatoes with soft rot disease in room temperature logistics and its mechanism

  • LIU Jin ,
  • ZHANG Hongcui ,
  • CHENG Sheng ,
  • HE Xinyao ,
  • ZHANG Min
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  • (College of Food Science of Southwest University, Food Storage and Logistics Research Center of Southwest University,Laboratory of Quality Safety Risk Assessment for Argo-products on Storage and Preservation (Chongqing), Ministry of Agriculture, Chongqing 400715, China)

Received date: 2020-01-15

  Online published: 2020-07-15

Abstract

Ginger extract with a volume fraction of 25%,50% and 100% was used to carry out in vitro and in vivo experiments on Rhizopus stolonifer, a pathogen of soft rot, to explore the effect of ginger extract on soft rot of sweet potatoes under room temperature logistics conditions, so as to solve the problem of soft rot of sweet potatoes under room temperature logistics conditions. The results showed that ginger extract could inhibit the mycelia growth, spore germination and spore bud tube growth of Rhizopus stolonifera in vitro culture test, and the higher the volume fraction, the better the effect. In vivo experiment, ginger extract can increase the activity of polyphenol oxidase (PPO), peroxidase (POD), superoxide dismutase (SOD), peroxidase (POD), superoxide dismutase (SOD) and phenylalamine ammonia-lyase (PAL) and inhibit the activity of catalase (CAT) and ascorbate peroxidase (APX) while maintaining the higher content of total phenol and flavonoids in sweet potatoes, which effectively reduced the incidence of soft rot in sweet potatoes. To sum up, ginger extract could not only directly inhibit the growth of Rhizopus stolonifer, but also resist the invasion of microorganisms by regulating the physiological changes of sweet potatoes, and inhibit the occurrence of soft rot, and the higher the volume fraction, the better the effect.

Cite this article

LIU Jin , ZHANG Hongcui , CHENG Sheng , HE Xinyao , ZHANG Min . Effect of ginger extract on sweet potatoes with soft rot disease in room temperature logistics and its mechanism[J]. Food and Fermentation Industries, 2020 , 46(12) : 57 -65 . DOI: 10.13995/j.cnki.11-1802/ts.023379

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