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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (4): 39-46.doi: 10.11707/j.1001-7488.20140406

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Somatic Embryogenesis of Picea asperata Induced from Immature Embryos

Zhang Jianwei1, Wang Junhui1, Li Qingfen1, Ma Jianwei2   

  1. 1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry, CAF Beijing 100091;
    2. Xiaolongshan Forestry Research Institute, Tianshui, Gansu Province Tianshui 741022
  • Received:2013-05-27 Revised:2013-10-09 Online:2014-04-25 Published:2014-05-06
  • Contact: 王军辉

Abstract:

Immature zygotic embryos of Picea asperata were used as explants to investigate effects of cone collection dates, genotypes, different concentration of auxin and cytokinin on the induction of embryogenic callus. At the same time, the key factors affecting the differentiation and maturation of somatic embryos were also comprehensively investigated. The results showed that the optimal medium for induction and proliferation of embryogenic callus was 1/2 LM + 2.2 mg·L-1 2,4-D + 1.1 mg·L-1 6-BA + 10 g·L-1 sucrose + 2 g·L-1 gellan gum + 1g·L-1 casein hydrolysate. The best medium for differentiation of somatic embryos was 1/2 LM + 24 mg·L-1 ABA + 50 g·L-1 PEG4000 + 30 g·L-1 sucrose + 1 g·L-1 activated charcoal+ 4 g·L-1 gellan gum+ 1 g·L-1 casein hydrolysate. The suitable medium of germination was 1/4 LM + 20 g·L-1 sucrose + 1 g·L-1 AC+ 4 g·L-1 gellan gum + 1 g·L-1 casein hydrolysate. All medium was supplemented with 0.5 g·L-1 L-glutamine, and adjusted to pH 5.8.

Key words: Picea asperata, somatic embryogenesis, embryogenic callus, mature somatic embryos

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