2011•Zhongguo shucaiRequires access
Studies on Relation between Phenol Content,Activities of PPO and POD,and Browning of Different Artichok Cultivars
Zhizhong Li
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Abstract
The phenol content and activities of polyphenol oxidase(PPO)and peroxidease(POD),and browning degree in 5 artichok(Helianthus tuberosus L.)cultivars were tested.The result indicated that phenol content,activities of PPO and POD,and browning degree existed significant variation among the 5 artichok cultivars,and indexes of the 3 northern cultivars were higher than that of the 2 southern cultivars.The correlation analysis showed that the relation between PPO and browning degree is positively significant among the 4 cultivars,all of which had tumour of irregular shape.The correlation coefficient r=0.982.The result of browning principal component analysis showed that phenol content,activities of PPO and POD were 3 variables jointly affecting artichok browning.