Natural cold acclimation of Ligustrum lucidum in response to exogenous application of paclobutrazol in Beijing

  • Yang Yang
  • Runfang Zhang
  • Xiaojing Duan
  • Zenghui Hu
  • Man Shen
  • Pingsheng LengEmail author
Original Article


To investigate the influence of exogenous paclobutrazol (PBZ) application on the natural cold acclimation of Ligustrum lucidum, 1-year-old L. lucidum seedlings were conducted with PBZ at four concentrations (0, 100, 300, and 500 mg L−1) from September to December 2016, and leaves were collected to measure physiological and biochemical parameters. Results showed that 500 mg L−1 was the optimum concentration, which led to stronger freezing tolerance during natural cold acclimation. The enhanced freezing tolerance induced by exogenous PBZ application was attributed to the accumulation of chlorophyll, proline, soluble protein, and soluble sugar, and the regulation of gibberellic acid and abscisic acid. PBZ treatments initiated a cascade of steps for advancing the cold acclimation of L. lucidum. It appears that exogenous PBZ application may be applied to L. lucidum grown in northern China, where the growing periods are short and there are early fall frost events and low mid-winter temperatures.


Cold acclimation Compatible compound Freezing tolerance Paclobutrazol Phytohormone 



We gratefully acknowledge anonymous reviewers for their helpful comments on this manuscript. This study was supported by the National Natural Science Foundation of China (31600498), Key Project of Beijing Municipal Education Committee (KZ201510020021), The Project of Coustruction of Innovative Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality (IDHT20180509).


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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2019

Authors and Affiliations

  • Yang Yang
    • 1
    • 2
  • Runfang Zhang
    • 2
  • Xiaojing Duan
    • 3
  • Zenghui Hu
    • 1
    • 2
  • Man Shen
    • 4
  • Pingsheng Leng
    • 1
    • 2
    Email author
  1. 1.Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignBeijing University of AgricultureBeijingChina
  2. 2.Landscape Architecture CollegeBeijing University of AgricultureBeijingChina
  3. 3.Ministry of Education Key Laboratory for Silviculture and ConservationBeijing Forestry UniversityBeijingChina
  4. 4.Plant Science and Technology CollegeBeijing University of AgricultureBeijingChina

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