1. Natural cold acclimation of Ligustrum lucidum in response to exogenous application of paclobutrazol in Beijing
- Author
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Runfang Zhang, Man Shen, Xiaojing Duan, Zenghui Hu, Yang Yang, and Pingsheng Leng
- Subjects
0106 biological sciences ,0301 basic medicine ,biology ,Physiology ,Plant physiology ,Plant Science ,biology.organism_classification ,01 natural sciences ,Paclobutrazol ,03 medical and health sciences ,chemistry.chemical_compound ,Horticulture ,030104 developmental biology ,chemistry ,Chlorophyll ,Cold acclimation ,Proline ,Agronomy and Crop Science ,Ligustrum lucidum ,Abscisic acid ,Gibberellic acid ,010606 plant biology & botany - Abstract
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.
- Published
- 2019
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