园艺学报 ›› 2016, Vol. 43 ›› Issue (7): 1383-1390.doi: 10.16420/j.issn.0513-353x.2016-0044

• 研究报告 • 上一篇    下一篇


白龙强1,*,刘玉梅1,2,*,苗 丽1,张小翠1,李衍素1,贺超兴1,于贤昌1,**   

  1. (1中国农业科学院蔬菜花卉研究所,北京 100081;2菏泽学院园林工程系,山东菏泽 274000)
  • 出版日期:2016-07-25 发布日期:2016-07-25

Effect of Gibberellin on Growth and Accumulation of Nitrogen of Cucumber Under Suboptimal Root-zone Temperature

BAI Long-qiang1,*,LIU Yu-mei1,2,*,MIAO Li1,ZHANG Xiao-cui1,LI Yan-su1,HE Chao-xing1,and YU Xian-chang1,**   

  1. (1Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China;2 Landscape Engineering Department Heze University,Heze,Shandong 274000,China)
  • Online:2016-07-25 Published:2016-07-25



关键词: 黄瓜, 赤霉素, 根区亚低温, 氮代谢, 能量, 碳骨架


The purpose of this paper is to clarify the effect of gibberellin(GA)on the energy and carbon(C)skeleton supply of nitrogen(N)metabolism of cucumber(Cucumis sativus L.)under suboptimal root-zone temperatures and to provide some theoretic basis for searching an effective way to regulate the N use efficiency of cucumber.Cucumber seedlings at 2-leaf stage were treated with root-zone temperature(RT)22 ℃,RT 16 or RT 16 in the presence of 5 μmol · L-1 GA3(GA)for 8 d. Then the items,including individual plant dry mass,chlorophyll fluorescence parameters,photosynthesis parameters,activity of phosphoenolpyruvate carboxylase(PEPCase)and sucrose phosphate synthase(SPS),N and  C accumulation,and energy distribution between N and C metabolism were tested.The results showed that exposure of cucumber seedlings to a RT of 16 led to a significant reduction in the photochemistry activity of PSⅡ,O2 evolution rate,activity of PEPCase and SPS,and energy distribution in N metabolism,while a rise in C/N. However,application of GA3 showed prominent effects on mitigating the stress of suboptimal RT. Furthermore,GA treatment increased energy and C skeleton distribution in nitrogen metabolism. In conclusion,GA increased N absorption of cucumber under suboptimal RT conditions through increasing the energy and C skeleton supply.

Key words: cucumber, gibberellin, suboptimal root-zone temperature, nitrogen metabolism, energy;, carbon skeleton