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Bulletin of Botanical Research ›› 2006, Vol. 26 ›› Issue (2): 198-200.doi: 10.7525/j.issn.1673-5102.2006.02.016

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A preliminary study on dynamics of catalase from larch seedling

YANG Qian;QIAO Chen;SUN Jun;BAI Xue-Hua   

  1. 1. Inner Mongolia Medical College, Hohhot 010059 2. Inner Mongolia Agricultural University, Huhhot 010018
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-03-20 Published:2006-03-20
  • Contact: YANG Qian
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Abstract: A study on dynamics of the catalase(CAT) from the seedling of four species of larch were made by means of iodometry. The results showed that CAT activities (25℃, pH 7.0) of larch seedling is 48.8 ~ 77.9 U·g-1 FW;Km values 8.3×10-2~2.38×10-1 mol·L-1;Vmax 0.071~0.200 μmol·min-1; Optimum temperatures 15~25℃. From adaptive range of temperature, L. principis-rupprechtii and L. gmelini are wider, L. olgensis and L. chinensis are narrower. Optimum pH 7.0. Adaptive range of L. chinensis is the narrowest, it may be degenerate species.

Key words: Larix, seedling, catalase, dynamics

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