Journal
FOOD CHEMISTRY
Volume 106, Issue 2, Pages 501-508Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2007.06.012
Keywords
table grape (Vitis vinifera L. cv Jingxiu); pre- and postharvest; chitosan; decay; quality
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The effects of preharvest chitosan spray (PCS) or/and postharvest chitosan coating (PCC) treatments on the quality and physiological response of table grape fruit stored at 20 or 0 degrees C was evaluated, respectively. PCS/PCC treatment showed the best control effect on decay. PCC or PCS/PCC treatment significantly decreased the weight loss of fruit stored at 20 degrees C. Additionally, all chitosan treatments inhibited the increase in rate of soluble solid content to titratable acid in fruit, stored at 20 degrees C, while enhancing the rate at 0 degrees C and affecting the content of total phenolic compounds in the fruit. Furthermore, the activities of superoxide dismutase decreased in all chitosan treatments and PCS or/and PCC treatments also changed the activities of polyphenol oxidase, peroxidase and phenylalanine ammonia-lyase. The results indicated the beneficial effect of chitosan by preharvest spray and/or postharvest coating on fruit quality and resistance to fruit decay. (C) 2007 Elsevier Ltd. All rights reserved.
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