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題名 | Biochemistry on Postharvest Metabolism and Deterioration of Some Tropical Tuberous Crops=若干熱帶塊莖作物之收穫後代謝及敗壞的生化研究 |
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作者 | Uritani,Ikuzo; |
期刊 | Botanical Bulletin of Academia Sinica |
出版日期 | 19990700 |
卷期 | 40:3 1999.07[民88.07] |
頁次 | 頁177-183 |
分類號 | 434.3 |
語文 | eng |
關鍵詞 | 塊莖作物; 收穫; 代謝; 敗壞; Colocasia esculenta; Coumarin; Ipomoea batatas; Manihot esculenta; Microbial deterioration; Physiological deterioration; Phytoalexin; Polyphenol; Storage protein; Tropical tuberous crops; |
英文摘要 | This paper deals with a biochemical comparison of the postharvest metabolism and deterioration among three tropical tuberous crops: sweet potato, cassava, and taro, focusing on sweet potato. These often suffer from wounding and infection during harvest, transportation, and storage. In response to wounding or infection, the three crops underwent some similar metabolic alterations, such as in the production of stress compounds and changes in proteins, but they also showed some different reactions. In sweet potato and taro, wounding was often healed soon by the formation of a lignin layer succeeding production of polyphenols and changes in proteins. No such layer formed in cassava, which deteriorated at xylems soon after harvest in a phenomenon called vascular streaking, vascular discoloration, or physiological deterioration. When the three crops were attacked by microbes or insects, metabolic changes were induced more vigorously, including the induction of some enzymes, production of stress compounds such as coumarins and phytoalexins, and more enhancement of polyphenol production. However, in cassava, the stress compounds were also produced in the case of wounding. |
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