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Journal of Tea Science ›› 2005, Vol. 25 ›› Issue (3): 197-202.doi: 10.13305/j.cnki.jts.2005.03.007

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Variation of Polygalacturonase Activity and its Biochemical Effects in Zuoqing Stage of Oolong Tea New Techniques

TANG Hao1, 2, YANG Wei-li2, WEN Hai-tao2   

  1. 1.Tea Research Institute of Guangdong Academy of Agricultural sciences, Guangzhou, 510640, China;
    2. Food Technology College of Hunan Agricultural University, Changsha, 410128, China
  • Online:2005-09-25 Published:2019-09-16

Abstract: In this trial, two tea cultivars named Meizhan and Maoxie were used in the investigation on the variation of polygalacturonase(PG) activity and soluble pectin contents in processing tea leaves during Zuoqing (new technique) and control(no Yaoqing ) treatments. Results showed that the activity of PG was increased slightly after Saiqing, it was gradually increased in the previous stage of Yaoqing and reached the peak in the completion of the 3rd Yaoqing proccces. The PG activity showed significant variation between diffreret cultivars and various Yaoqing stage. The PG activity and the range of variation were significantly lower in the control than that in the Yaoqing treatment. A significant correlation between the control of water and soluble pectin, and the PG activity.

Key words: Oolong tea, New techniques, Zuoqing, Polygalacturonase(PG), Biochemical effects

CLC Number: