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Bulletin of Botanical Research ›› 2025, Vol. 45 ›› Issue (1): 130-138.doi: 10.7525/j.issn.1673-5102.2025.01.014

• Original Paper • Previous Articles    

Effects of Exogenous Flavonoids on Embryogenic Callus Proliferation and Somatic Embryogenesis of Korean Pine

Wenhui GUO1, Yue WANG1, Lin WU2, Jianfei YANG1,3(), Ling YANG1, Peng ZHANG1,3, Haibo WU1,4, Hailong SHEN1,4   

  1. 1.College of Forestry,Northeast Forestry University,Harbin 150040
    2.National Forest Tree Improved Variety Base,Lushuihe Forestry Co. ,LTD,Fusong 134506
    3.Key Laboratory of Sustainable Management of Forest Ecosystem,Ministry of Education,Harbin 150040
    4.Korean Pine Engineering Technology Research Center of State Forestry and Grassland Administration,Harbin 150040
  • Received:2024-05-31 Online:2025-01-20 Published:2025-01-23
  • Contact: Jianfei YANG E-mail:yjf19910304@126.com

Abstract:

Flavonoids play important roles in plant somatic embryogenesis. In order to explore the effect of flavonoids on somatic embryogenesis of Korean pine(Pinus koraiensis), the embryogenic calluses were used as materials. The proliferation rate of embryogenic callus and the number of somatic embryos, and oxidative stress indexes in embryogenic callus were assessed after adding flavonoids(quercetin, naringenin, catechin) in different concentrations and phenylalanine aminolytic lyase inhibitor(2-aminoindan-2-phosphonate hydrochloride). The results showed that the proliferation rate of embryogenic callus was significantly decreased with increasing levels of flavonoids, while the number of somatic embryos induced increased first then decreased, and the number of somatic embryos reached the peak under the treatment of exogenous flavonoids at 20 μmol?L-1. After treatment with flavonoids, the total reactive oxygen species(ROS) level, hydrogen peroxide(H2O2) content and malondialdehyde(MDA) content were reduced in embryogenic callus; the superoxide dismutase(SOD) activity was increased; the catalase(CAT), peroxidase(POD), ascorbate peroxidase(APX) and glutathione peroxidase(GPX) activities were decreased. In summary, exogenous flavonoids might regulate cell proliferation and callus differentiation by affecting the level of oxidative stress indexes in embryogenic callus, hence, promote the formation of somatic embryos of Korean pine.

Key words: Pinus koraiensis, embryogenic callus, flavonoids, somatic embryogenesis, oxidative stress index

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