- 期刊
- OpenAccess
Impacts of Brassinolide on the Photosynthetic Characteristics of 'Qiyuexian' Jujube
摘要
The jujube cultivar 'Qiyuexian' was chosen as object in this study. Effects of different concentrations of brassinolide (BL) on its characteristic parameters of light/CO_2 response curve were investigated. The results indicated that the mentioned parameters were significantly affected by the concentrations of BL. The Light Saturation Point (LSP) was significantly increased by 17.42% after being treated by 0.1 mg/L BL. After spraying 0.2 mg/L BL, the maximum net photosynthetic rate (P_(nmax)), apparent quantum efficiency (AQY), LSP, maximum carboxylation rate (V_(cmax)), maximum rate of photosynthetic electron transport (J_(max)) and Triose Phosphate Utilization rate (TPU) were significantly increased by 21.14, 20.26, 21.95, 21.14, 20.26 and 21.95%, respectively. The AQY, LCP, LSP, V_(cmax) and J_(max) were significantly increased by 12.55, 60.75, 19.00, 20.96 and 20.06% respectively after being treated by 0.3 mg/L BL, while the LCP and LSP were significantly increased by 65.53% and 25.79% respectively after being treated by 0.4 mg/L BL. In conclusion, 0.2 mg/L BL treatment could significantly accelerate the overall photosynthetic ability of ＂Qiyuexian＂ jujube, promoting its accumulation of assimilative products, which is beneficial to increase the production and quality of jujube fruits.