| 宋晨慧，张有福，王梦可，王露露，陈春艳.3 种圆柏属植物叶片气孔特征对自然光强的响应[J].广东农业科学,2022,49(4):28-34 |
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3 种圆柏属植物叶片气孔特征对自然光强的响应 |
| Response of Leaf Stomatal Characteristics of ThreeSpecies of Juniperus to Natural Light Intensity |
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| DOI：10.16768/j.issn.1004-874X.2022.04.004 |
| 中文关键词: 圆柏属 气孔 光强 树冠阴阳面 日变化 |
| 英文关键词: Juniperus stomata light intensity shady and sunny sides of the canopy diurnal change |
| 基金项目:国家自然科学基金（31870380） |
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| 摘要点击次数: 1051 |
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| 中文摘要: |
| 【目的】光诱导的气孔开合是植物调节吸收 CO2 和蒸腾作用的重要原因，探讨不同光环境下植物
气孔特征有助于理解植物对环境的适应机制。【方法】以北方广泛栽培的具有异形叶特征的 3 种圆柏属植物为
研究对象，应用 NaClO 法制片，对气孔特征进行观察与参数测定，分析同一生境下短期光照变化（日变化）与
长期光照差异（树冠阴面和阳面）下叶片的气孔特征及其相关性。【结果】3 种圆柏属植物叶有两种叶形，其中
鳞形叶气孔分布在近轴面和两鳞形叶交界处的远轴面上，刺形叶气孔仅分布于近轴面且有两条明显的气孔带。
日变化下 3 种圆柏属植物叶片保卫细胞宽度中午比早晨分别显著减小 0.06%、0.09%、0.09%，气孔开度显著增
大 27.6%、24.3%、24.3%，且二者呈负相关，但中午保卫细胞长度和气孔密度与早晨无显著差异，表明 3 种植
物主要通过保卫细胞宽度的收缩调节气孔开度以适应短期光照变化。【结论】3 种圆柏属植物阳面叶片保卫细胞
长度和宽度、气孔密度、气孔开度与阴面叶相应指标均存在显著差异，且前三者均与气孔开度具有显著相关，
表明 3 种植物依赖于保卫细胞长度和宽度的伸缩来改变气孔开度和气孔密度，以适应长期光照差异。气孔特征
可以较好地反映植物对长期和短期光照适应性的差异。 |
| 英文摘要: |
| 【Objective】Light-induced stomatal opening and closing is an important factor regulating CO2
intake
and transpiration in plants. The study of plant stomatal characteristics under different light environments is helpful to
understand the mechanism of plant adaptation to the environment.【Method】Taking three species of Juniperus plants with
heteromorphic leaves widely cultivated in northern China as research objects, the stomatal characteristics were observed and
parameters were measured by using NaClO method, and the stomatal characteristics and their correlation under short-term
light change （diurnal change） and long-term light difference （shady and sunny sides of the canopy） in the same habitat
were investigated.【Result】The leaves of three species of Juniperus had two leaf shapes. The stomata of scale leaves were
distributed on the adaxial side and the abaxial side at the junction of two scale-like leaves, and the stomata of thorn leaves
were only distributed on the adaxial side with two stomatal bands. Under diurnal changes, the width of guard cells in leaves
of the three species of Juniperus at noon decreased significantly by 0.06%, 0.09% and 0.09% compared with that in the morning, and the stomatal opening increased significantly by 27.6%, 24.3% and 24.3%, and they were negatively correlated,
however, there was no significant difference in guard cell length and stomatal density between morning and noon, indicating
that the three species regulated stomatal aperture to adapt to short-term light changes mainly by guarding the contraction of
cell width.【Conclusion】There were significant differences in guard cell length and width, stomatal density and stomatal
aperture between the sunny leaves and the shady leaves of the canopy of the three species, and the first three parameters were
significantly correlated with stomatal aperture, indicating that the three species changed stomatal aperture by regulating guard
cells in length and width and stomatal density to adapt to the long-term light difference. Stomatal characteristics can better
reflect the difference of plant adaptability to long-term and short-term light. |
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