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Scientia Silvae Sinicae ›› 2002, Vol. 38 ›› Issue (2): 78-82.doi: 10.11707/j.1001-7488.20020214

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STUDY ON GROWTH ADAPTABILITY DIFFERENTIATION OF SPHAEROPSIS SAPINEA IN CHINA

Wu Xiaoqin1,Weiyulian3,He Zhongming2   

  1. Resource and Environment College, Nanjing Forestry University Nanjing 210037;Forestry College, Fujian Agriculture and forestry university Nanping 353001
  • Received:2001-02-16 Revised:1900-01-01 Online:2002-03-25 Published:2002-03-25

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Abstract:

Growth adaptability differentiation in 49～55 isolates of Sphaeropsis sapinea obtained from 13 provinces in China was studied. There were growth differences in various media, six temperatures and six pH values among the isolates. It is the first report to apply a mathematical function for establishing temperature and pH growth curve (0～72 h) to compare their optimum values and differences in the isolates of S. sapinea in China. The average optimum growth temperature of all isolates was 26.8℃ , and that of isolate ZJ2 was the lowest (23.1℃), the isolate F1 highest (29.6℃) . The average optimum growth pH was pH 5.6 ,and the isolate F7 lowest (pH 4.4), the isolate F5 highest (pH 6.7). Different geographic regions may have some effects on adaptation of isolates to temperature , but no obviously effect on adaptation to pH.

Key words: Pine shoot blight, Sphaeropsis sapinea, Growth adaptation