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Journal of Tea Science ›› 2007, Vol. 27 ›› Issue (2): 153-158.doi: 10.13305/j.cnki.jts.2007.02.010

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Preliminary Studies on Pathogenic Activity and Physical and Chemical Characteristics of Toxins from Gloeosporium theae-sinensis

LIU Shou-an, HAN Bao-yu*, FU Jian-yu, CUI Lin, LI Gang**   

  1. Key Laboratory of Tea Chemical Engineering, Ministry of Agriculture; Tea Research Institute , Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
  • Received:2006-10-26 Revised:2007-03-08 Online:2007-06-25 Published:2019-09-23

Abstract: Tea anthracnose fungi, Gloeosporium theae-sinensis, can produce pathogenic exo-toxin, which induced the lesions of tea leaves and the symptoms being similar to those resulted from G. theae-sinensis in the fields. The cultural filtrate of G. theae-sinensis was used to toxin bioassay, so as to make a study of the optimum conditions for toxin-producing and characteristics of toxins. The optimum toxin-producing conditions were as follows: pH 5.0, and 25℃ cultivating for 16 days in the manner of vibration with Czapek-Dox liquid medium. The method of immerging the tea shoots into toxin solution was appropriate for the bioassay of toxins.

Key words: gloeosporium theae-sinensis, bioassay, cultural conditions, toxin

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