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Journal of Tea Science ›› 2015, Vol. 35 ›› Issue (6): 543-550.doi: 10.13305/j.cnki.jts.2015.06.005

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Effects of Exogenous 24-epibrassinolide on the Photosynthetic Characteristics of Tea Plants (Camellia sinensis)

LI Zhixin1,2, LI Xin1,*, FAN Lichao1,2, HAN Wenyan1,*   

  1. 1. Tea Research Insititute, Chinese Academy of Agricultural Science, Hangzhou 310008, China;
    2. Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2015-06-01 Revised:2015-09-09 Online:2015-12-15 Published:2019-08-26

Abstract: 24-epibrassinolide (EBR) is an important plant hormone, which plays an important role in a variety of adverse resistance in plants. The effects of exogenous EBR on photosynthesis, Rubisco and FBPase activity and the expression of related-gene from tea leaves (Camellia sinensis cv. ‘Longjing 43’, ‘Xiangguliaobaihao’, and ‘Qingmingzao’) under field condition were investigated. It was showed that after exogenous EBR (0.1βmg·L-1) treatment: Net photosynthetic rate of these three cultivars increased by 49.06%, 45.49% and 92.34% respectively. Vcmax increased by 21.82%, 21.68 % and 21.68%, and Jmax increased by 17.16%, 23.86% and 23.86%, respectively. The activity of Rubisco and FBPase increased significantly. Furthermore, the expression of Rubisco and FBPase related-gene increased significantly. These results suggested that application of exogenous EBR could enhance Vcmax, Jmax and the activity of Rubisco and FBPase effectively, which ultimately promoted the photosynthetic carbon fixation, and the photosynthetic rate of tea plants.

Key words: tea plant (Camellia sinensis), 24-epibrassinolide, photosynthetic characteristics, gene expression

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