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Journal of Tea Science ›› 2020, Vol. 40 ›› Issue (5): 597-606.doi: 10.13305/j.cnki.jts.2020.05.004

• Research Paper • Previous Articles     Next Articles

Effects of Exogenous 5-aminolevulinic Acid on Photosynthetic and Physiological Characteristics of Tea Plants under Low Temperature Stress

YAN Fei1,2,3,4, JIANG Wenhua1, QU Dong1,2,3, FU Jing1,2,3,4, ZHAO Xuan4   

  1. 1. College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China;
    2. Shaanxi Bio-resources Key Laboratory, Hanzhong 723000, China;
    3. Coordination and Innovation Center for Comprehensive Development of Qinba Biological Resources, Hanzhong 723000, China;
    4. Qinba Black Tea Research Institute, Shaanxi University of Technology, Hanzhong 723000, China
  • Received:2019-11-28 Revised:2020-02-13 Online:2020-10-15 Published:2020-10-10

Abstract: In order to explore the effects of 5-aminolevulinic acid (ALA) on photosynthetic and physiological characteristics of tea plants under natural low temperature stress in winter, we sprayed 0, 10, 30mg·L-1 and 50 mg·L-1 ALA on ‘Shaancha 1’ (low temperature tolerant cultivar) and ‘Jinmudan’ (low temperature sensitive cultivar). The results show that ALA of suitable concentration could improve net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate, maximum photochemical efficiency of PSⅡ and potential activity of PSⅡ. Moreover, ALA treatment could promote the accumulations of water extract, caffeine, free amino acids, catechins, theanine, soluble sugar and protein contents. Exogenous ALA could improve the photosynthetic capacity and tea quality under low temperature stress. ALA treatment (50 mgL-1) could effectively improve the cold tolerance of ‘Shaancha 1’. While 10 mg·L-1 and 30 mg·L-1 ALA treatment had effects on the relief of low temperature stress in ‘Jinmudan’.

Key words: ALA, tea plants, low temperature stress, photosynthetic characteristics, physiological characteristics

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