DIRECT MEASUREMENTS OF TURGOR PRESSURE POTENTIALS .4. NATURALLY OCCURRING PRESSURES IN GUARD-CELLS AND THEIR RELATION TO SOLUTE AND MATRIC POTENTIALS IN THE EPIDERMIS
DIRECT MEASUREMENTS OF TURGOR PRESSURE POTENTIALS .4. NATURALLY OCCURRING PRESSURES IN GUARD-CELLS AND THEIR RELATION TO SOLUTE AND MATRIC POTENTIALS IN THE EPIDERMIS
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DOI：
10.1093/jxb/30.4.829
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发表时间：
1979-01-01
影响因子：
6.9
通讯作者：
MEIDNER, H
中科院分区：
文献类型：
--
作者：
EDWARDS, M;MEIDNER, H
在不同程度的气孔开放的表皮，附属和保卫细胞的膨压进行了测量[在紫露草]。结果与估计的溶质电位的不同的细胞汁液和假设的细胞壁的基质电位。这些结果有助于理解气孔机制中的辅助细胞的作用，特别是在禾本科类型和组织张力的作用，作为一个压力参与膨压现象在表皮组织。这些结果可以解释在漂浮在水面上或将其保持在潮湿的无CO2空气中后发现的异常大的气孔开口。
Measurements were made of turgor pressures in epidermal, subsidiary and guard cells [in Tradescantia virginiana] at different degrees of stomatal opening. The results are correlated with estimates of solute potentials of the different cell saps and with a postulated matric potential of cell walls. The results contribute to an understanding of the role of the subsidiary cells in the stomatal mechanism especially in the Graminaceous type and the role of tissue tension as a pressure involved in turgor phenomena in epidermal tissue. The results make it possible to explain the abnormally large stomatal openings found after floating illuminated leaf tissue on water or keeping it in humid CO2-free air.