Effects of Soil Drought with Nocturnal Warming on Leaf Stomatal Traits and Mesophyll Cell Ultrastructure of a Perennial Grass
Effects of Soil Drought with Nocturnal Warming on Leaf Stomatal Traits and Mesophyll Cell Ultrastructure of a Perennial Grass
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土壤干旱和夜间变暖对多年生草本植物叶片气孔性状和叶肉细胞超微结构的影响
DOI：
10.2135/cropsci2008.12.0725
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发表时间：
2009-09
期刊：
影响因子：
2.3
通讯作者：
Zhou, G. S.
中科院分区：
文献类型：
--
作者：
Shimizu, H.;Xu, Z. Z.;Zhou, G. S.
虽然缺水和气温上升是一个渐进的全球性问题，但它们对植物的综合影响却很少受到关注。对羊草（Leymus chinensis（Trin.）茨维尔植物使用本地栗钙土。利用光学显微镜和透射电子显微镜对气孔特征和叶肉细胞超微结构进行了研究。在严重水分胁迫下，丙二醛和离子渗漏增加，特别是在30/25°C（白天/夜晚）的高温下。轻度水分胁迫增加气孔密度，特别是在正常夜间温度为30/20°C（白天/夜晚）时。中度和重度水分胁迫不影响气孔密度。在水分胁迫下，叶肉细胞超微结构受到干扰，叶绿体和线粒体的膜系统被打破，特别是在夜间高温下。叶片净光合速率和气孔导度与离子渗漏率和丙二醛呈显著负相关。结果表明，夜间高温可加重土壤水分亏缺对叶片气孔特征和叶肉细胞超微结构的不利影响，并增强膜脂过氧化作用。
While water deficit and rising temperatures are progressive global problems, their combined effect on plants has received less attention. Stomatal traits, mesophyll cell ultrastructure, net photosynthetic rate, lipid peroxidation, and ion leakage were examined in leaves of Leymus chinensis (Trin.) Tzvel. plants using native Castanozem soil. Stomatal traits and mesophyll cell ultrastructure were studied using light microscopy and transmission electron microscope. Under severe water stress, malondialdehyde and ion leakage increased, especially at high night temperatures of 30/25°C (day/night). Mild water stress increased stomatal density, especially with normal night temperatures of 30/20°C (day/night). Moderate and severe water stress did not affect stomatal density. Under water stress, mesophyll cell ultrastructures were disturbed, and the membrane systems of chloroplasts and mitochondria were broken, particularly at high night temperatures. Leaf net photosynthetic rate and stomatal conductance were negatively correlated with ion leakage and malondialdehyde. The results suggested that high night temperature may aggravate the adverse effects of soil water deficit on leaf stomatal traits and mesophyll cell ultrastructure and also enhance lipid peroxidation.
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影响因子：
7.2
作者：
Dat, JF;Pellinen, R;Van Breusegem, F
通讯作者：
Van Breusegem, F
叶子气孔密度对水状态的反应及其与草中光合作用的关系。
影响因子：
6.9
作者：
Xu, Zhenzhu;Zhou, Guangsheng
通讯作者：
Zhou, Guangsheng
影响因子：
4
作者：
S. Munné‐Bosch;T. Jubany-Marí;L. Alegre
通讯作者：
S. Munné‐Bosch;T. Jubany-Marí;L. Alegre
影响因子：
11.6
作者：
Oksanen, E;Riikonen, J;Vapaavuori, E
通讯作者：
Vapaavuori, E
影响因子：
4.9
作者：
N. H. Shah;G. M. Paulsen
通讯作者：
N. H. Shah;G. M. Paulsen