Chinese Bulletin of Botany ›› 2025, Vol. 60 ›› Issue (2): 235-245.DOI: 10.11983/CBB24061  cstr: 32102.14.CBB24061

• TECHNIQUES AND METHODS • Previous Articles     Next Articles

Tissue Culture, Rapid Propagation and Efficient Transient Expression Systems of Rosa multiflora

Xuemin Cao1,3,, Ying Bao2,, Yuexin Zhang1,3, Ruijie Li1,3, Jianxin Su1,3, Wei Zhang1,3,*()   

  1. 1National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture & Forestry Sciences of Huazhong Agricultural University, Wuhan 430070, China
    2Hebei Key Laboratory of Plant Biotechnology Research and Application, Department of Life Science, Tangshan Normal University, Tangshan 063000, China
    3Institute of Flowers Research, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2024-04-24 Accepted:2024-08-20 Online:2025-03-10 Published:2024-08-22
  • Contact: Wei Zhang
  • About author:First author contact:

    †These authors contributed equally to this paper

Abstract: A rapid propagation system via tissue culture for Rosa multiflora was established using the stem segments with buds of the current-year as the experimental material. The results showed that the best explants were stem segments with axillary buds. The best disinfection method was to soak the explants in 75% ethanol for 30 seconds, and then soak them in 10% sodium hypochlorite solution for 20 minutes. The survival rate can reach 96%. The optimal bud-induction medium was MS+1.0 mg∙L-1 6-BA+0.01 mg∙L-1 NAA+0.1 mg∙L-1 GA3. The budding rate can reach 98% after 30 days of cultivation. WPM was the best basal medium for the proliferation of sterile regenerated plantlets, and the proliferation coefficient was 2.87. The best medium for rooting was 1/2MS+1.0 mg∙L-1 6-BA+0.1 mg∙L-1 NAA, and the rooting rate can reach 93%. The transplanting survival rate of sterile regenerated plantlets was 98%. On this basis, the transient expression system of R. multiflora was established. The results showed that the optimal transformation conditions for transient expression were OD600 of 0.8 for the bacterium culture medium, vacuum negative pressure of -0.10 MPa and vacuum suction twice for 15 minutes each time. The transient expression efficiency can reach 96%. The results of this study laid a foundation for the establishment of regeneration and genetic transformation system of R. multiflora, and also provided technical support for studying on the gene function of Rosa plants.

Key words: Rosa multiflora, rapid propagation, sterile regenerated plantlets, vacuum infiltration, transient expression