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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (11): 2657-2667.doi: 10.16420/j.issn.0513-353x.2023-0674

• Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Screening Research and Comprehensive Evaluation of Rooting Agents for Chrysanthemum Cuttings

WU Yajie1, JIAO Yu1, WANG Hailong1, CHEN Zhixing2, PU Hao2, ZHU Zihan1, ZOU Qian1, TANG Shukun3,4, CAO Yanru1,**()   

  1. 1 Agricultural Resource Utilization and Technology Innovation Team,College of Agriculture and Life Sciences,Kunming University,Kunming 650214,China
    2 Kunming Hongzhihua Horticulture Company Limited,Kunming 651700,China
    3 Key Laboratory for Microbial Resources of the Ministry of Education,Key Laboratory for Conservation and Utilization of Bio-Resources,Yunnan Institute of Microbiology,College of Life Sciences,Yunnan University,Kunming 650091,China
    4 Yunnan Key Laboratory of Fermented Vegetables,Honghe,Yunnan 661100,China
  • Received:2024-07-10 Revised:2024-08-23 Online:2024-12-12 Published:2024-11-26
  • Contact: CAO Yanru

Abstract:

In order to screen out the rooting agent that has a good effect on the rooting of chrysanthemum cuttings under the condition of barren red soil,the red soil was used as the substrate,and different rooting agents were used to treat the chrysanthemum cuttings,and the phenotypic indexes such as rooting rate,rooting time,root length,root number,root dry weight,and root thickness were determined. The effect of rooting agent was evaluated by principal component analysis. In order to explore the mechanism of growth-promoting seedlings of chrysanthemum cuttings treated with rooting agent,nutrients,hormone content and enzyme activity were determined,and the main physiological indexes affecting the rooting of chrysanthemum cuttings were clarified by extreme analysis. Principal component analysis(PCA) converted 7 individual indexes of rooting phenotype into 2 independent composite indexes,with a cumulative contribution rate of 89.69%. According to the comprehensive score of rooting of chrysanthemum cuttings,Nashi 778 has the highest score. Compared with the control,the rooting time was advanced by 2 days,the rooting rate increased by 34.44% on the 15th day,the number of roots at the 30th day increased by 97.80%,the root dry weight increased by 54.97%,and the root thickness increased by 24.24%. The second score of Double Gil GGR-6 was 78.64% higher than that of the control in root length. Among the physiological indexes of cuttings,the IAA range was the largest,which was the key factor affecting the rooting of chrysanthemum cuttings. Soluble protein content is the most important nutrient affecting the rooting of chrysanthemum cuttings. In conclusion,Nashi 778 inducer and Double Gil GGR-6 had good root-promoting effects,and could be used as excellent rooting agents for promoting chrysanthemum cuttings.

Key words: Chrysanthemum, cutting, rooting agent, physiological indicators, principal component analysis, range analysis