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Acta Prataculturae Sinica ›› 2020, Vol. 29 ›› Issue (8): 104-115.DOI: 10.11686/cyxb2019465

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Effects of light quality on growth, and physiological and biochemical traits of Sarcandra glaba seedlings

XIE De-jin1, LI Jing-wen1, YE You-jie1, YIN Biao1, REN Ke1, CHEN Ling-yan2, RONG Jun-dong1, ZHENG Yu-shan1, 2, *   

  1. 1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2. College of Landscape, Fujian Agriculture and Forestry University, Fuzhou 350002, China
  • Received:2019-10-30 Revised:2019-12-16 Online:2020-08-20 Published:2020-08-20

Abstract: This research aimed to explore in detail the effects of three light regimes [white light (WL), red light (RL), and blue light (BL)] on growth status and physiological and biochemical traits of Sarcandra glaba seedlings. Measures of plant growth status conducted were: plant height, stem diameter, total fresh weight (roots and shoots), total dry weight (roots and shoots), root morphology indexes, and root∶shoot ratio. Physiological and biochemical traits measured included chlorophyll, solution protein, solution sugar, reducing sugar, and malondialdehyde (MDA) concentrations of leaf tissues; peroxidase (POD) and superoxide dismutase (SOD) activities, net photosynthetic rate (Pn), maximum light use efficiency (LUEmax), maximum water use efficiency (WUEmax) and maximum photosynthetic efficiency (Fv/Fm). Most of the measured traits showed differences between light regimes. Compared with WL and BL groups, the RL treatment resulted in a significant reduction in a majority of the measured traits. Exceptions were plant height and WUEmax which were increased in RL. Compared with the WL treatment, in the BL light regime, root morphology indexes, root∶shoot ratio, protein and MDA concentrations, POD and SOD activities and WUEmax were considerably increased, while other indexes were decreased. In this experiment, the RL treatment resulted in a significant decrease in many traits. Meanwhile, the BL regime not only stimulated root morphology indexes, but also improved WUEmax. This research lays a theoretical foundation for developing light quality guidelines for the cultivation of S. glaba seedlings.

Key words: Sarcandra glaba, light qualities, physiological and biochemical indexes, maximum water use efficiency, maximum light use efficiency, maximum photosynthetic efficiency