Elucidation of the Mechanisms Underlying Hypo-osmotically Induced Turgor Pressure Regulation in the Marine Alga Valonia utricularis

2006 ◽  
Vol 213 (1) ◽  
pp. 47-63 ◽  
Author(s):  
Karl-Andree Binder ◽  
Frank Heisler ◽  
Markus Westhoff ◽  
Lars H. Wegner ◽  
Ulrich Zimmermann
Keyword(s):  
Marine Alga ◽  
Turgor Pressure ◽  
Pressure Regulation ◽  
Valonia Utricularis ◽  
Turgor Pressure Regulation

scholarly journals Turgor Pressure Regulation in Valonia utricularis

1976 ◽  
Vol 58 (5) ◽  
pp. 608-613 ◽  
Author(s):  
Ulrich Zimmermann ◽  
Ernst Steudle ◽  
Peter I. Lelkes
Keyword(s):  
Turgor Pressure ◽  
Pressure Regulation ◽  
Valonia Utricularis ◽  
Turgor Pressure Regulation

Hydraulische Leitfähigkeit von Valonia utricularis / Hydraulic Conductivity of Valonia utricularis

1971 ◽  
Vol 26 (12) ◽  
pp. 1302-1311 ◽  
Author(s):  
E. Steudle ◽  
U. Zimmermann
Keyword(s):  
Hydraulic Conductivity ◽  
Cell Membrane ◽  
Marine Alga ◽  
Water Movement ◽  
Turgor Pressure ◽  
Irreversible Thermodynamics ◽  
Rapid Changes ◽  
Cell Turgor ◽  
Valonia Utricularis

A method is described for the simultaneous determination of rapid changes of the cell turgor pressure (hydrostatic pressure) in algal cells (cell size must be at least 3 mm in diameter), and of the net volume flow across the cell membrane arising after a change of the cell turgor pressure or of the osmotic pressure in the outside medium. On the basis of the equations of irreversible thermodynamics it is possible to calculate the hydraulic conductivity of the cell membrane from these measurements, as it is theoretically shown.The hydraulic conductivities of the marine alga Valonia utricularis determined in two independent ways (by osmotic and hydrostatic experiments) are equal. For exosmosis, Lpex (hydrostatic) and Lpex (osmotic) amounted to (9,6 ± 1,0) ·10-7 and (9,8 ± 1,9) · 10-7 respectively cm · sec-1 · atm-1, and for endomosis, Lpen (hydrostatic) was (9,4 ± 1,1) ·10-7 cm · sec-1 · atm-1.A polarity in the water movement across the cell membranes as discussed in the literature could not be found for Valonia utricularis.

Abscisic acid and turgor pressure regulation in tomato roots

1996 ◽  
Vol 149 (3-4) ◽  
pp. 372-376 ◽  
Author(s):  
A. Griffiths ◽  
A.D. Parry ◽  
H.G. Jones ◽  
A.D. Tomos
Keyword(s):  
Abscisic Acid ◽  
Turgor Pressure ◽  
Pressure Regulation ◽  
Tomato Roots ◽  
Turgor Pressure Regulation
Sign in / Sign up

Export Citation Format

Share Document