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Cells 2018, 7(10), 180; https://doi.org/10.3390/cells7100180

The Relationship between Turgor Pressure Change and Cell Hydraulics of Midrib Parenchyma Cells in the Leaves of Zea mays

1
Department of Plant Ecology, Bayreuth University, D-95440 Bayreuth, Germany
2
Division of Soil and Fertilizer, National Institute of Agricultural Sciences, RDA, Wanju 55365, Jeollabuk-do, Korea
3
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Gyeongbuk, Korea
Current address: Division of Soil and Fertilizer, National Institute of Agricultural Sciences, RDA, Wanju 55365, Jeollabuk-do, Korea.
*
Authors to whom correspondence should be addressed.
Received: 17 September 2018 / Revised: 8 October 2018 / Accepted: 18 October 2018 / Published: 22 October 2018
(This article belongs to the Special Issue Aquaporins)
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Abstract

Leaf dehydration decreases water potential and cell turgor pressure. Therefore, changes in cell turgor pressure may regulate water transport across plant cell membranes. Using a cell pressure probe, the hydraulic properties of parenchyma cells in the midrib of maize (Zea mays L.) leaves were measured (half time T 1 / 2 of water exchange in cells as a measure of hydraulic conductivity Lp). Using intact plants with root systems encased in a pressure chamber, the root systems were pressurized and the turgor pressure in leaf cells increased by increments up to 0.3 MPa. However, the increase in the cell turgor did not increase but stabilized T 1 / 2 values. Increased water potential in leaf cells seemed to have stabilizing effects on the T 1 / 2 probably due to enhanced water availability. When the cell turgor decreased by 0.1 MPa to 0.3 MPa with releasing the pressure in the pressure chamber, T 1 / 2 was temporarily increased to a large degree, a factor of up to 13 within 30 min. View Full-Text
Keywords: aquaporin; cell pressure probe; hydraulic conductivity; Zea mays L. aquaporin; cell pressure probe; hydraulic conductivity; Zea mays L.
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Kim, Y.X.; Stumpf, B.; Sung, J.; Lee, S.J. The Relationship between Turgor Pressure Change and Cell Hydraulics of Midrib Parenchyma Cells in the Leaves of Zea mays. Cells 2018, 7, 180.

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