Effects of Ultraviolet-C and Cold Treatment on <i>Pestalotiopsis mangiferae</i> and Physiological Indices of Postharvest Mango Fruits
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Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (4): 764-772.DOI: 10.3969/j.issn.1000-2561.2020.04.018

• Crop Pests, Diseases and Their Control, Environmental Protection • Previous Articles     Next Articles

Effects of Ultraviolet-C and Cold Treatment on Pestalotiopsis mangiferae and Physiological Indices of Postharvest Mango Fruits

MAI Xinyun1,HUANG Jiangqi2,HUANG Bin1,WANG Yi1,LAN Xidan1,LIAO Fenyan1   

  1. 1. College of Agriculture and Food Engineering, Baise University, Baise, Guangxi 533000, China
    2. Longbang Customs, Jingxi, Guangxi 533800, China
  • Received:2019-06-10 Revised:2019-08-07 Online:2020-04-25 Published:2020-05-09

Abstract:

The effects of different doses of ultraviolet-C (UV-C) and storage temperature on the expansion of lesions caused by Pestalotiopsis mangiferae, total phenols, flavonoids, malondialdehyde, soluble protein, enzyme activities of peroxidase and polyphenol oxidase of postharvest mango fruits were studied. UV-C treatment at 4.9 kJ/m 2 significantly suppressed the expansion of lesions, enhanced the content of total phenols and flavonoids, reduced the content of soluble protein, increased the activity of peroxidase and polyphenol oxidase, and inhibited the production of malondialdehyde. UV-C treatment at 9.8 kJ/m 2 could damage plant cells, and weaken the promoting effects on flavonoids, soluble proteins, peroxidase and polyphenol oxidase activities. Compared with 25 ℃, low temperature treatment at 13 ℃ could suppress the expansion of lesions, maintain higher content of total phenols and flavonoids, inhibit the formation of malondialdehyde, and delay the peak time of peroxidase and polyphenol oxidase activity. UV-C treatment at 4.9 kJ/m 2 combined with storage at 13 ℃ had best a control effect on P. mangiferae of mango fruits, and maintained much better quality of postharvest mango fruits effectively.

Key words: mango, ultraviolet-C, temperature, stem-end rot disease, Pestalotiopsis mangiferae

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