JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (2): 17-25.doi: 10.3969/j.issn.1000-2006.201901015

Special Issue: 青钱柳叶有效成分专题

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Effects of light quality on accumulation of phenolic compounds and antioxidant activities in Cyclocarya paliurus (Batal.) Iljinskaja leaves from different families

CHEN Pei1(), ZHOU Mingming1, FANG Shengzuo1,2,*(), LIU Yang1, YANG Wanxia1,2, SHANG Xulan1,2   

  1. 1. College of Forestry, Nanjing Forestry University, Nanjing 210037, China
    2. Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
  • Received:2019-01-10 Revised:2019-05-25 Online:2020-03-30 Published:2020-04-01
  • Contact: FANG Shengzuo E-mail:1292025985@qq.com;fangsz@njfu.edu.cn

Abstract:

【Objective】Light quality has a certain effect on the accumulation of phenolic compounds in plants. Cyclocarya paliurus (Batal.) Iljinskaja is a unique species in China, it is widely used as a material for wood, medicines and ornamentation. The objective of the present study was to investigate the effect of light quality on the accumulation of phenolic compounds in C. paliurus (Batal.) Iljinskaja leaves from different families and their antioxidant activity and thereby provide a basis for optimizing the light environment during seedling development and further development ofC. paliurus (Batal.) Iljinskaja healthcare products.【Method】Current-year seedlings of C. paliurus (Batal.) Iljinskaja from four families (Guangxi Jinzhongshan No. 7, Guangxi Jinzhongshan No. 6, Sichuan Muchuan No. 31 and Zhejiang Anji No. 1) were treated with four light quality groups (white light, blue light, green light and red light) with controlled temperature and humidity in an artificial climate chamber. Leaf biomass, phenolic content and yield in C. paliurus (Batal.) Iljinskaja leaves as well as phenolic antioxidant activity [DPPH (1, 1-diphenyl-2-picrylhydrazyl) radical-scavenging ability and FRAP (ferric reducing power assay)]in vitro were measured, and the correlation between phenolic content and antioxidant activity was analyzed.【Result】Light quality and family and their interaction had significant effects on leaf biomass, phenolic content and yield per plant and antioxidant activity. However, there were no significant effects of family on the total flavonoid content and yield per plant. In general, white light treatment resulted in the highest value of leaf biomass but the lowest value of phenolic content and yield per plant and antioxidant activity. The seedlings treated with blue light and green light showed higher content of phenolics and antioxidant activity, but green light treatment resulted in the lowest value of leaf biomass. Therefore, blue light treatment was more beneficial in improving the accumulation of phenolics and their antioxidant capacity inC. paliurus (Batal.) Iljinskaja leaves. At the family’s level, the leaf biomass ofC. paliurus (Batal.) Iljinskaja from Anji No. 1 was the highest. However, the highest values of phenolic content and yield per plant and their antioxidant capacity were observed in Jinzhongshan No. 6. The correlation analysis showed that the content of total phenolics and phenolic acids significantly correlated with the antioxidant activity ( P < 0.05). 【Conclusion】Regulation of light quality significantly affected the accumulation of phenolics and their antioxidant activity in the leaves of C. paliurus (Batal.) Iljinskaja belonging to the different families. Leaves of C. paliurus (Batal.) Iljinskaja from Jinzhongshan No. 6 treated with blue light accumulated more phenolics and thereby exhibited higher antioxidant ability. The results provide a reference for the development of C. paliurus (Batal.) Iljinskaja healthcare products and light management for directional cultivation in C. paliurus (Batal.) Iljinskaja plantations.

Key words: Cyclocarya paliurus (Batal.) Iljinskaja, light quality, family, phenolics, antioxidant activities, blue light

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