Bulletin of Botanical Research ›› 2025, Vol. 45 ›› Issue (4): 558-568.doi: 10.7525/j.issn.1673-5102.2025.04.008

• Original Paper • Previous Articles     Next Articles

Tissue Culture and Rapid Propagation of Endangered Salvia petrophila

Yingying WANG1, Dengli YU2, Fengjin QIU1, Rongrong YAN1, Guoxiong HU1()   

  1. 1.Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education),College of Life Sciences/Institute of Agro-bioengineering,Guizhou University,Guiyang 550025
    2.Management Department of Maolan National Nature Reserve,Libo 558400
  • Received:2024-12-13 Online:2025-07-20 Published:2025-07-25
  • Contact: Guoxiong HU E-mail:gxhu@gzu.edu.cn

Abstract:

To establish the rapid propagation system of tissue culture of an endangered plant Salvia petrophila, the disinfectant concentration and duration in the sterilization process, as well as the regulation of hormone types and concentrations on seed germination, the subculture and preliferation of stem segments with axillary buds at the base, induction and differentiation of callus from stem segments, rooting, hardening off and transplanting were investigated respectively. The results showed that (1) the appropriate sterilization method for S. petrophila seeds was 75% alcohol treatment for 30 s, followed by 5% sodium hypochlorite solution for 8 min, achieving a germination rate of 40.83%. (2) The appropriate medium for seed germination was MS supplemented with 1.0 mgL-1 6-BA and 0.1 mgL-1 NAA, resulting in a germination rate of 71.12%. (3) For subculture proliferation, the appropriate medium was MS with 1.0 mgL-1 6-BA and 0.1 mgL-1 NAA, yielding a proliferation coefficient of 5.5. (4) For stem segments, the appropriate callus induction medium was MS+1.0 mgL-1 6-BA+1.0 mgL-1 2,4-D, with an induction rate of 97.10%. The appropriate differentiation medium for callus induced from stem segments was MS+1.5 mgL-1 6-BA+0.1 mgL-1 NAA. (5) The appropriate basic medium for adventitious bud rooting was 1/2MS with 1.0 mgL-1 NAA, achieving a rooting coefficient of 99.11%. (6) After hardening off, the rooted seedlings of S. petrophila were transplanted into a mixed substrate of peat, perlite, and vermiculite in a volume ratio of 1∶1∶1, resulting in a survival rate of 85.5%. The results might lay a technical foundation for the species conservation and resource utilization of S. petrophila, and also provided valuable ideas for the rapid propagation techniques of other Salvia species.

Key words: Salvia petrophila, endangered plant, tissue culture, rapid propagation

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