%0 Journal Article %A DIAO Jian %A HU Yan-Bo* %A SUN Guang-Yu %A WANG Ke %A YANG Rui %T Effects of Leaf-spraying Nitrate on Stomatal Dynamics and Photosynthesis of Syringa oblata Lindl. Leaves %D 2015 %R 10.7525/j.issn.1673-5102.2015.06.009 %J Bulletin of Botanical Research %P 843-847 %V 35 %N 6 %X 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. %U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2015.06.009