Studies On The Changes Of The Pincipal Component And The Post-harvest Physio-biochemicals Of Kudzu (P.thomsonii Benth)

In this study, two-year-old Kudzu (y? thomsonii Benth) was uesed as the materials in investigation on the changes of physio-biochemical indexes, such as starch , isof lavones , water, cellulose, superoxide dismutase(SOD) , catalase(CAT) , peroxidase(POD), polyphenol oxidaes(PPO). Results showed that the content of starch , isof lavones and water decreased during storage. The reduction of starch is the largest one, the content of starch has reducted from 38. 3 percent to 6. 5 percent after being stored 140 days. SOD> CAT activity rosed firstly and then descended. PPO> POD -activity has been rosing through the storage. The reduction of starch has became slightly by embedding storage. The changes of activity of all enzymes have been postponed during the embedding storage. It is proved that embedding treatment can lower the level of metabolism and postpone the senescence of Kudzu. After analyzing the pincipal components, we find that the activities of SODs CAT and POD are mostly related to the changes of physio-biochemical indexes of the post-harvest Kudzu.The changes of POD activity are more appropriate in describing the senescence of Kudzu.In this test,Dimethyl fumarate, Metyl topsin and Sodium dehydrogene acetate were used in the antiseptic treatment during the storage. A contrast on the effects of mildew was taken between embedding storage and non-treat ?storage .The experiment indicated that Metyl topsin was the best preservative in the Kudzu storage. Metyl topsim treatment combine embedding storage would get the best result in the storge and keeping fresh of Kudzu.