外源油菜素内酯对茶树光合特性的影响

doi:10.13305/j.cnki.jts.2015.06.005

Abstract

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. Vc_max increased by 21.82%, 21.68 % and 21.68%, and J_max 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 Vc_max, J_max 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

CLC Number:

LI Zhixin, LI Xin, FAN Lichao, HAN Wenyan. Effects of Exogenous 24-epibrassinolide on the Photosynthetic Characteristics of Tea Plants (Camellia sinensis)[J]. Journal of Tea Science, 2015, 35(6): 543-550.

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

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