Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (2): 346-354.DOI: 10.3969/j.issn.1004-1524.2023.02.12

• Horticultural Science • Previous Articles     Next Articles

Effects of storage temperature on important postharvest quality of Canna edulis in Guangxi

HUANG Qiuwei1(), MAO Liyan1, TAN Xiaohui1, WANG Liping1, LIU Gongde1, PENG Jifei2, LONG Lingyun1,*()   

  1. 1. Guangxi Subtropical Crops Research Institute, Nanning 530001, China
    2. Guangxi Tian’e County Shangala Industrial Limited Company, Hechi 547300, Guangxi, China
  • Received:2022-04-13 Online:2023-02-25 Published:2023-03-14
  • Contact: LONG Lingyun

Abstract:

Temperature changes during storage will affect the quality of Canna edulis tubers. In order to explore the change rule of important quality of Canna edulis tubers under different storage temperature conditions, Canna edulis in Tian’e County, Guangxi Province were used as test material, and changes of nutritional quality indexes under three temperature treatments (low temperature 6 ℃, normal temperature 25 ℃and high temperature 35 ℃) were analyzed. The results showed that water content of tubers of the three temperature treatments showed a significant decrease, and contents of soluble sugar and reducing sugar showed a significant increase when during the storage period of 0-9 d; when the storage period was 9-15 d, water content of the C. edulis treated at low temperature and normal temperature increased slightly, and contents of soluble sugar and reducing sugar decreased significantly. During the 15 d storage period, soluble protein content of C. edulis tubers treated at low temperature showed a downward trend with the change of storage time. Soluble protein content of the treated samples changed irregularly; when the storage period was 0-3 d, total flavonoid content of the C. edulis tuber treated at the three temperatures increased significantly, and the starch content decreased significantly. There was a significant downward trend, but the changes of starch content were irregular; during the storage period of 0-12 d, starch extraction rate of C. edulis tuber treated at low temperature increased significantly and then decreased slightly. The results of principal component analysis and correlation analysis showed that the tubers of C. edulis tuber treated at low temperature were more suitable for starch extraction. This study provided a reference for the formulation of standards for the storage, starch extraction and preparation of C. edulis tuber in Guangxi and the optimization of the processing technology of C. edulis tuber in factories.

Key words: storage temperature, Guangxi, Canna edulis, quality, starch

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