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叶片生长进程中气孔发育对叶温调节的影响
Authors
刘玉军
吴冰洁
姜闯道
石雷
Publication date
1 January 2015
Publisher
Doi
Cite
Abstract
鉴于气孔发育影响气孔导度和蒸腾速率,推测气孔发育可能影响叶温调节。为验证这一假设并阐述相关规律,在控光和控温条件下研究了冬青卫矛和华北紫丁香气孔发育、气孔导度、蒸腾速率及其与叶温的关系。结果表明,伴随冬青卫矛、华北紫丁香叶片生长气孔逐渐增大,但气孔密度下降;在此过程中,气孔导度和蒸腾速率逐步提高,而叶片温度降低;尽管冬青卫矛和华北紫丁香叶片的气孔密度和大小差异很小,但华北紫丁香近轴侧和远轴侧均有气孔分布,而冬青卫矛则只有远轴侧分布气孔,且相同条件下华北紫丁香的气孔导度和蒸腾速率高、叶温低。因此,气孔发育能够促进气孔导度和蒸腾速率提高,有助于降低叶温;近轴侧气孔可能更有利于蒸腾降温
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of Botany,Chinese Academy Of Sciences
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Last time updated on 27/10/2022