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首页> 美国卫生研究院文献>Plant Physiology >Stomatal Responses to Flooding of the Intercellular Air Spaces Suggest a Vapor-Phase Signal Between the Mesophyll and the Guard Cells
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Stomatal Responses to Flooding of the Intercellular Air Spaces Suggest a Vapor-Phase Signal Between the Mesophyll and the Guard Cells

机译：对细胞间空域充水的气孔响应表明叶肉和保卫细胞之间的汽相信号

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摘要

Flooding the intercellular air spaces of leaves with water was shown to cause rapid closure of stomata in Tradescantia pallida, Lactuca serriola, Helianthus annuus, and Oenothera caespitosa. The response occurred when water was injected into the intercellular spaces, vacuum infiltrated into the intercellular spaces, or forced into the intercellular spaces by pressurizing the xylem. Injecting 50 mm KCl or silicone oil into the intercellular spaces also caused stomata to close, but the response was slower than with distilled water. Epidermis-mesophyll grafts for T. pallida were created by placing the epidermis of one leaf onto the exposed mesophyll of another leaf. Stomata in these grafts opened under light but closed rapidly when water was allowed to wick between epidermis and the mesophyll. When epidermis-mesophyll grafts were constructed with a thin hydrophobic filter between the mesophyll and epidermis stomata responded normally to light and CO2. These data, when taken together, suggest that the effect of water on stomata is caused partly by dilution of K+ in the guard cell and partly by the existence of a vapor-phase signal that originates in the mesophyll and causes stomata to open in the light.
机译：结果表明，用水淹没叶片的细胞间空气间隙会导致圆叶紫露菌，细叶莴苣，向日葵和月见草的气孔迅速闭合。当将水注入细胞间空间，真空渗入细胞间空间或通过加压木质部而迫使其进入细胞间空间时，会发生响应。向细胞间隙注入50 mm KCl或硅油也会导致气孔关闭，但反应速度比蒸馏水慢。通过将一片叶子的表皮置于另一片叶子的暴露的叶肉上，可以制造出淡色锥虫的表皮间叶移植物。这些移植物中的气孔在光线下打开，但是当允许水在表皮和叶肉之间芯吸时迅速关闭。当在叶肉和表皮气孔之间用薄疏水过滤器构建表皮间叶移植物时，对光和CO2的反应正常。这些数据加在一起，表明水对气孔的影响部分是由于保卫细胞中K + 的稀释，部分是由于存在来自叶肉的气相信号而引起的。并使气孔在光线下打开

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