Welcome to Chinese Journal of Applied Ecology! Today is Share:

Chinese Journal of Applied Ecology ›› 2024, Vol. 35 ›› Issue (2): 424-430.doi: 10.13287/j.1001-9332.202402.004

Previous Articles     Next Articles

Effects of light qualities on growth and physiological-biochemical traits of Scutellaria baicalensis

YANG Yanmeng1,2, ZHANG Jiaxing1,2, LI Yaru1,2, MA Jingran1,2 , WANG Duo3, JIN Zhancai4, XIE Lulu1, DENG Jiaojiao1, YE Ji1, YU Dapao1, WANG Qingwei1*   

  1. 1CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China;
    3Liaoning Provincial Ecology & Environment Monitoring Center, Shenyang 110163, China;
    4Qinghai Provincial Haixi Forestry and Grassland Station, Delingha 817000, Qinghai, China
  • Received:2023-09-08 Revised:2023-12-06 Online:2024-02-18 Published:2024-08-18

Abstract: Canopy spectral composition significantly affects growth and functional traits of understory plants. In this study, we explored the optimal light condition suitable for enhancing Scutellaria baicalensis’s yield and quality, aiming to provide scientific reference for the exploitation and utilization of medicinal plant resources in the understory of forests. We measured the responses of growth, morphology, biomass allocation, physiological traits, and secon-dary metabolites of S. baicalensis to different light qualities. S. baicalensis was cultured under five LED-light treatments including full spectrum light (control), ultraviolet-A (UV-A) radiation, blue, green, and red light. Results showed that UV-A significantly reduced plant height, base diameter, leaf thickness, leaf area ratio, and biomass of each organ. Red light significantly reduced base diameter, biomass, effective quantum yield of photosystem Ⅱ (ФPSⅡ), and total flavonoid concentration. Under blue light, root length and total biomass of S. baicalensis significantly increased by 48.0% and 10.8%, respectively, while leaf number and chlorophyll content significantly decreased by 20.0% and 31.6%, respectively. The other physiological and biochemical traits were consistent with their responses in control. Our results suggested that blue light promoted photosynthesis, biomass accumulation, and secondary metabolite synthesis of S. baicalensis, while red light and UV-A radiation negatively affected physiological and biochemical metabolic processes. Therefore, the ratio of blue light could be appropriately increased to improve the yield and quality of S. baicalensis.

Key words: understory medicinal plant, canopy spectrum, yield, quality, secondary metabolite, functional trait