Quality attributes and cell wall properties of strawberries (Fragaria annanassa Duch.) under calcium chloride treatment
Fusheng Chen, Hui Liu, Hongshun Yang, Shaojuan Lai, Xiaoli Cheng, Ying Xin, Bao Yang, Hongjiang Hou, Yongzhi Yao, Shaobing Zhang, Guanhao Bu and Yun Deng
Food Chemistry, Volume 126, Issue 2, 15 May 2011, Pages 450–459
2011
บทคัดย่อ
Effects of CaCl2 (0%, 1% and 4%) treatment on quality attributes and cell wall pectins of strawberry fruits stored at 4 °C for 15 d were investigated. Strawberry firmness was not significantly affected by CaCl2 treatment. Compared to the other groups, the 1% CaCl2 group had better quality attributes, including decay rate, weight loss and soluble solids content. The treatment with 4% CaCl2 inhibited weight loss but caused phytotoxicity. During storage, the chain widths and lengths of water-soluble pectin (WSP), chelate-soluble pectin (CSP) and sodium carbonate-soluble pectin (SSP) decreased. Strawberry softening seemed to be due to modifications of CSP and SSP, especially the side chains. CaCl2 treatment significantly slowed the breakdown of CSP and SSP chains by strengthening the ionic crosslinkages among these pectin molecules. These results illustrate the fundamental CaCl2 effects and will help improve the application of CaCl2 to postharvest fruits.