ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Biochemistry on postharvest metabolism and deterioration of some tropical tuberous crops.

Uritani, I.;

Botanical Bulletin of Academia Sinica Year: 1999 Vol: 40 Issue: 3 Pages: 177-183 Ref: 46 ref.

1999

บทคัดย่อ

The postharvest metabolism and deterioration of sweet potatoes, cassava and taro were compared. These often suffer from damage 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 potatoes and taro wounding was often soon healed by the formation of a lignin layer succeeding production of polyphenols and changes in proteins. No such layer formed in cassava, which deteriorated at the xylem 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 greater enhancement of polyphenol production. Howev

er, in cassava, the stress compounds were also produced in the case of wounding.