LIAO Jin,ZHOU Hong,LIU Bing,et al.Influences of Different Shading on Leaf Temperature and Physiological Response to the Summer High Temperature of Rhododendron pulchrum[J].Northern Horticulture,2013,37(07):74-77.
夏季城市绿地中不同遮阳条件下杜鹃叶温变化及其生理响应
- Title:
- Influences of Different Shading on Leaf Temperature and Physiological Response to the Summer High Temperature of Rhododendron pulchrum
- 文章编号:
- 1001-0009（2013）07-0074-04
- 分类号:
- S 685.21
- 文献标志码:
- A
- 摘要:
- 在自然高温条件下，从城市绿地中实地取样，观测了不同遮阳条件（全荫、半荫和全阳）下栽植的春鹃经历夏季高温产生的叶片形态损伤、叶温变化及其生理响应，研究比较了城市绿地不同遮阳条件对减弱杜鹃花品种“紫蝴蝶”夏季热害的作用。结果表明：叶温与环境光强变化呈正相关；全阳条件下的“紫蝴蝶”叶温明显高于半荫和全荫环境的“紫蝴蝶”叶片，夏季最高达40℃；全阳条件下的“紫蝴蝶”叶绿素和类胡萝卜素含量、细胞膜透性等生理指标均与半荫和全荫环境的呈极显著差异。结合“紫蝴蝶”叶片形态损伤和生理指标，证实全阳条件下的“紫蝴蝶”存在明显的夏季热害，而疏林环境下的半荫条件能有效减弱“紫蝴蝶”的夏季热害，是“紫蝴蝶”的适宜种植环境。
- Abstract:
- This experiment was conducted in high-tempered urban landscape to test the influence of different shading conditions (full-shade，semi-shade and no-shade) on the morphological damage，leaf temperature and physiological response of Rhododendron pulchrum leaves,different shading conditions on weakening heat damage in high tempered summer were comparely studied.The results showed that the leaf temperature was positively correlated with light intensity thereby the leaves under no-shade condition could reach the maximum temperature to 40℃ in summer，significantly higher than the semi-shade and full-shade.The chlorophyll contents，carotene contents and membrane cell membrane permeability of no-shade leaves were also significantly different from leaves under other shade conditions.Thus，semi-shade condition was proved to be the most favorable condition for plant growth of Rhododendron pulchrum spp..
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备注/Memo
第一作者简介：廖金（1987-），女，在读硕士，研究方向为杜鹃栽培生理生态。E-mail：crystalliao8771@gmail.com.