JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (1): 193-199.doi: 10.3969/j.issn.1000-2006.201809012

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Analysis of photosynthetic characteristics of hybrid golden leaf ginkgo

ZHAO Hui1(), LYU Lianghe2, LU Xin2, GUO Liyu1, ZHU Zunling3,4,*(), WANG Gaiping2,4   

  1. 1. College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
    2. College of Forestry, Nanjing Forestry University, Nanjing 210037, China
    3. College of Art and Design, Nanjing Forestry University, Nanjing 210037, China
    4. Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
  • Received:2018-09-13 Revised:2019-01-15 Online:2020-02-08 Published:2020-02-02
  • Contact: ZHU Zunling E-mail:2496435015@qq.com;zhuzunling@njfu.edu.cn

Abstract:

【Objective】 The effects of artificial hybridization on the photosynthetic characteristics of Ginkgo biloba progeny were studied and the basis for further obtaining excellent germplasm of Ginkgo biloba with strong environmental adaptability was provided. 【Method】 The annual seedlings of hybrid golden leaf ginkgo (‘Wannianjin’בNanlin No. 1’) were used as materials, and the same plant natural pollination (father is uncertain)Ginkgo biloba annual seedlings were used as control. The basic parameters of photosynthetic parameters and light response curves of leaves were measured, and the changes of photosynthetic capacity and environmental adaptability were compared.【Result】 The net photosynthetic rate, stomatal conductance and water use efficiency of hybrid golden leaf ginkgo were significantly higher than the control, showing a stronger adaptability to seasonal changes. The results of light response curve fitting showed that the maximum net photosynthetic rate of Ginkgo biloba was higher and the photosynthetic capacity was stronger. At the same time, the light saturation point, the internal quantum efficiency, the quantum efficiency at the light compensation point, and the apparent quantum efficiency are also high. The light compensation point and dark breathing rate are also higher than the control, and the organic matter is consumed quickly. Correlation analysis showed that the net photosynthetic rate showed a significant positive correlation with stomatal conductance and water use efficiency; stomatal conductance was positively correlated with apparent quantum efficiency and transpiration rate.【Conclusion】 Hybridization changed the photosynthetic parameters of Ginkgo biloba, effectively improved the potential of light energy utilization and light transformation of offspring, and made better use of a full-day of light. Therefore, it is possible to cultivate a golden leaf ginkgo variety that is more adaptable to the light environment.

Key words: golden leaf ginkgo, hybrid, photosynthetic characteristics

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