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Bulletin of Botanical Research ›› 2016, Vol. 36 ›› Issue (2): 190-194.doi: 10.7525/j.issn.1673-5102.2016.02.006

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Adventitious Bud Induction with Immature Embryo of Herbaceous Peony

WEI Dong-Xia1,2,3；GAO Kai4；YUAN Yan-Bo1；TANG Zheng-Jiao1；YU Xiao-Nan1,2,3*   

  1. 1.College of Landscape Architecture,Beijing Forestry University,Beijing　100083；
    2.National Flower Engineering Research Center,Beijing　100083；
    3.Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding,Beijing　100083；
    4.Luoyang Academy of Agriculture and Forestry Sciences,Luoyang　471002
  • Online:2016-03-15 Published:2016-05-20

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Abstract: Culture of zygotic embryos is an effective way to accelerate the breeding process of herbaceous peony. With the zygotic embryos of three herbaceous peony(Paeonia lactiflora Pall.) cultivars(‘Fen Yu Nu’, ‘Zhu Sha Pan’ and ‘Tuan Ye Hong’), we studied the affection of different embryo age, explant types, sterilization methods and starting medium formula on root initiation in vitro. The suitable development period were 50 and 70 d after flowering for embryo-culture of ‘Zhu Sha Pan’ and ‘Tuan Ye Hong’, respectively. We got better results when using excised zygotic embryos rather than keeping part of endosperm reserved. The optimal disinfection method for explant was that firstly treating carpel for 30-60 s with 70% alcohol, then for 20 min with 2% NaClO, and finally for 10 min with 2% NaClO. The optimal initial medium was 1/2MS+1.0 mg·L-1 IAA+0.5 mg·L-1 GA3.

Key words: Herbaceous peony, embryo-culture, root initiation