Food and Fermentation Industries >

2019 , Vol. 45 >Issue 18: 168 - 175

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.021018

Study on effects of carboxymethyl chitosan and Pholiota nameko peptides on fresh keeping of Pleurotus eryngii

  • QIAN Lei ,
  • ZHANG Yeni ,
  • LI Tao ,
  • ZHANG Zhijun
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  • 1. Tianjin Research Institute of Forestry and Pomology, Tianjin 300384, China;
    2.Tianjin Tianshou Edible Fungi Technology Co., Ltd., Tianjin 300384, China;
    3.College of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin 300384, China;
    4.College of Basic Science, Tianjin Agricultural University, Tianjin 300384, China;
    5.National Engineering Technology Research Center for Preservation of Agricultural Products; Key Laboratory of Storage of Agricultural Products, Ministry of Agriculture and Rural Affairs; Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin 300384, China

Online published: 2019-11-06

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Abstract

The fresh-keeping effects of carboxymethyl chitosan and Pholiota nameko peptides on Pleurotus eryngii was studied. P. eryngii was stored at 4 °C for 30 days after coated with carboxymethyl chitosan and P. nameko peptides. The changes in sensory quality, oxidative stress level, antioxidant enzymes activity and soluble solid content were determined. The results indicated that after 30d of storage, each coating treatment group could maintain color, hardness, superoxide dismutase and catalase activity, as well as reducing weight loss and respiratory intensity. Meanwhile, it inhibited the increase of malondialdehyde content and polyphenol oxidase activity, yet slow down the decrease of Vc and soluble sugar content, which was significantly different from the control group (P<0.05). Compared with carboxymethyl chitosan, the weight loss rate and respiratory intensity of complex coating reduced to 55.24% and 77.35% after 30d of storage, and the content of malondialdehyde and phenol oxidase activity decreased to 82.61% and 81.11%. In addition, superoxide dismutase and catalase activities increased by 20.83% and 44.97%, respectively, while Vc and soluble sugar content increased by 31.05% and 29.86%, respectively. Therefore, carboxymethyl chitosan and P. nameko peptides coating can inhibit the deterioration of sensory quality of Pleurotus eryngii during low temperature storage, thus delaying the aging process and reducing nutritional losses, which provides theoretical basis for the development of complex biological preservative and extending its shelf life.

Key words： carboxymethyl chitosan; pholiota nameko peptides; pleurotus eryngii; respiratory intensity; malondialdehyde; superoxide dismutase

Cite this article

QIAN Lei , ZHANG Yeni , LI Tao , ZHANG Zhijun . Study on effects of carboxymethyl chitosan and Pholiota nameko peptides on fresh keeping of Pleurotus eryngii[J]. Food and Fermentation Industries, 2019 , 45(18) : 168 -175 . DOI: 10.13995/j.cnki.11-1802/ts.021018

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