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Scientia Silvae Sinicae ›› 2005, Vol. 41 ›› Issue (3): 54-57.doi: 10.11707/j.1001-7488.20050309

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Improving Germination of Photinia Seed by Low Temperature and PEG Pretreatment

Zheng Huaibing1,Dong Li1,Zheng Caixia2   

  1. 1.College of Landscape and Architecture,Beijing Forestry University Beijing100083; 2.College of Biological Science and Technology, Beijing Forestry University Beijing100083
  • Received:2003-06-02 Revised:1900-01-01 Online:2005-05-25 Published:2005-05-25

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Abstract:

The effects of low temperature and PEG pretreatment on germination of Photinia seeds were investigated.During the germination of seeds pretreated with cold stress at 0～-2 ℃ for 24 h,the physiological and biochemical changes of the seeds were examined.In the PEG-pretreated seeds,the seed vigor index,the content of soluble proteins,boiling-stable proteins,as well as the activity of superoxide dismutase(SOD) and catalase (CAT) increased while the MDA content and the activity of peroxidase (POD) decreased.Meanwhile,the color of bands of polypeptides of 40.27、42.5、44.5、46.2、50.8kDwere darker in 15% PEG-pretreated seeds after 4 days germination at 21 ℃

Key words: Photinia, pretreated_seed, cold stress, PEG