Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (7): 1387-1392.DOI: 10.3969/j.issn.1000-2561.2020.07.014

• Plant Cultivation, Physiology & Biochemistry • Previous Articles     Next Articles

Growth and Photosynthetic Characteristics of Coffee Double Roots Grafting Seedling

SUN Yan,LIN Xingjun,LONG Yuzhou(),DONG Yunping,ZHAO Qingyun,TAN Jun   

  1. 1. Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning, Hainan 571533, China
    2. Key Laboratory of Genetic Resources Utilization of Spice and Beverage Crops, Ministry of Agriculture and Rural Affairs, Wanning, Hainan 571533, China
    3. Hainan Provincial Key Laboratory of Genetic Improvement and Quality Regulation for Tropical Spice and Beverage Crops, Wanning, Hainan 571533, China
  • Received:2019-08-02 Revised:2019-11-13 Online:2020-07-25 Published:2020-08-24
  • Contact: LONG Yuzhou


In order to improve the quality of coffee seedling, the seed seedlings of Caffea liberica No. 1 and Caffea canephora Reyan No. 1 were used as the grafting materials, and high-yielding clone C. canephora Reyan No. 1 was used as the scion. Biomass, root morphology characteristics, photosynthetic characteristics, height diameter ratio and seedling quality index among C. canephora Reyan No. 1 double roots grafting seedling (T1), C. liberica No. 1/ C. canephora Reyan No. 1 double roots grafting seedling (T2), C. liberica No. 1 double roots grafting seedling (T3) and conventional interspecific grafting seedling (CK, C. liberica No. 1 single root grafting seedling) were observed. Compared with CK, root tip number, pn, total biomass and seedling quality index of T1 and T2 were increased by 407.14% and 780.28%, 25.11% and 57.49%, 168.26% and 209.35%, 195.79% and 244.17%, respectively. The seedling quality of T1 and T2 was improved by raising plant root absorption and photosynthetic ability. The height diameter ratio of T3 was increased by 25.28%, and there was no significant difference in total biomass between CK and T3. Compared with the seedling of CK, the week seedling of T3 grew thinner and taller, and then grew into coffee tall-footed seedlings more easily. In summary, the advantage was evident in the plant growth of T1 and T2, particularly in T2 treatment.

Key words: coffee, grafting, double roots, photosynthetic characteristics, root morphology characteristics

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