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植物研究 ›› 2015, Vol. 35 ›› Issue (6): 843-847.doi: 10.7525/j.issn.1673-5102.2015.06.009

• 论文 • 上一篇    下一篇

叶面喷施硝酸盐对丁香叶片气孔动态、光合作用的影响

王珂;刁健;杨瑞;胡彦波*;孙广玉   

  1. 东北林业大学生命科学学院,哈尔滨 150040
  • 出版日期:2015-11-20 发布日期:2016-01-18
  • 基金资助:
     

Effects of Leaf-spraying Nitrate on Stomatal Dynamics and Photosynthesis of Syringa oblata Lindl. Leaves

WANG Ke;DIAO Jian;YANG Rui;HU Yan-Bo*;SUN Guang-Yu   

  1. College of Life Science,Northeast Forestry University,Harbin 150040
  • Online:2015-11-20 Published:2016-01-18
  • Supported by:
     

摘要: 以哈尔滨市绿化植物紫丁香(Syringa oblata Lindl.)为研究对象,借助便携式光合测定系统和电子显微镜,研究了叶面喷施硝酸盐(50 mmol·L-1 NaNO3溶液)对叶片气孔动态(气孔分布、气孔开度)和光合生理过程(光合—呼吸的光诱导、光化学效率、叶绿素含量以及细胞间隙二氧化碳浓度、气孔导度)的影响。结果表明:叶片上、下表皮均有气孔、腺毛分布,喷施处理第5 d时,叶片的气孔开度和导度、光合速率、叶绿素含量等未受到显著影响,但14 d时,气孔关闭、导度下降,光合—呼吸的光诱导过程受到显著影响。

关键词: 紫丁香, 硝酸盐, 光合诱导, 气孔开度, 暗呼吸, 光呼吸

Abstract: With Syringa oblata Lindl. seedling, a greening tree species in Harbin, we investigated the effects of leaf-spraying nitrate(50 mmol·L-1 NaNO3) on stomatal behavior and photosynthetic physiology by gas-exchange and electron microscope techniques. We analyzed stomatal distribution in upper and lower epidermis and stomatal opening as well as photosynthesis-dark respiration induction, photochemical efficiency, chlorophyll content, intercellular CO2 concentration and stomatal conductance. The stomata and glandular hairs are distributed in the upper and lower epidermis, the effects of leaf-spraying depend on treatment time. For five-day treatment, there were no significant differences in the parameters of stomatal behavior and photosynthesis between the treated and controlled leaves. However, 14-day treatment significantly declined stomatal opening and conductance, and inhibited photosynthesis-dark respiration.

Key words: Syringa oblata seedling, nitrate, photosynthesis induction, stomatal opening, dark respiration, photorespiration

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