Abstract
The root pressure probe was used for the first time to measure the hydraulic properties of entire root systems of youngPicea abies. Hydraulic conductance was measured by osmotic and hydrostatic pressure relaxation techniques. Osmotic experiments were conducted by changing the nutrient solution and hydrostatic experiments by causing flow across the root with the pressure probe and with external pressure applied to the root system or to the cut stem of the excised root system. Usually,Picea abies root systems did not develop appreciable root pressure (< 0.02 MPA) and could be induced to reach a root pressure of 0.07 MPa by treating with KNO3. In general, hydraulic conductance of the root system was large, but it was much smaller in the osmotic than in the hydrostatic experiments. Both hydrostatic techniques gave similar results. The results were explainable by a composite transport model of the root.
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References
CarlsonW C, HarringtonC A, FarnumP and HallgrenS W 1988 Effects of root severing treatments on loblolly pine. Can. J. For. Res. 18, 1376–1385.
ColemanM D, BledsoeC S and SmitB A 1990 Root hydraulic conductivity and xylem sap levels of zeatin riboside and abscisic acid in ectomycorrhizal Douglas-fir seedlings. New Phytol. 115, 275–284.
DaintyJ 1963 Water relations of plant cells. Adv. Bot. Res. 1, 279–326.
DaviesW J and MeinzerF C 1990 Stomatal responses of plants in drying soil. Biochem. Physiol. Pflanz. 186, 357–366.
FiscusE L 1975 The interaction between osmotic- and pressure-induced water flow in plant roots. Plant Physiol. 55, 917–922.
GowingD J G, DaviesW J and JonesH G 1990 A positive rootsourced signal as an indicator or soil drying in apple,Malus × Domestica-Borkh. J. Exp. Bot. 41, 1535–1540.
KramerP J 1983 Water Relations of Plants. Academic Press, Orlando. 489 p.
LandsbergJ J and FowkesN D 1978. Water movement through plant roots. Ann. Bot. (London) 42, 493–508.
LutzH J and BreiningerM Th 1986 Erste Ergebnisse von Auswaschungsversuchen mit Fichten (Picea abies) in Wasserkultur. Kali-Briefe 18, 267–273.
LopushinskyW 1980 Occurrence of root pressure exudation in Pacific Northwest conifer seedlings. For. Sci. 26, 275–279.
MeesG C and WeatherleyP E 1957 The mechanism of water absorption by roots. I. Preliminary studies on the effects of hydrostatic pressure gradients. Proc. Roy. Soc. London, Ser. B 147, 367–380.
NorthG B and NobelP S 1991 Changes in hydraulic conductivity and anatomy caused by drying and rewetting roots ofAgave deserti (Agavaceae). Am. J. Bot. 78, 906–915.
PassiouraJ B 1972 The effect of root geometry on the yield of wheat growing on stored water. Aust. J. Agric. Res. 23, 745–752.
PassiouraJ B 1988 Water transport in and to the root. Ann. Rev. Plant Physiol. Plant Mol. Biol. 39, 245–265.
PetersonC A and SteudleE 1993 Lateral hydraulic conductivity of early metaxylem vessels inZea mays L. roots. Planta 189, 288–297.
SandsR, FiscusE L and ReidC P P 1982 Hydraulic properties of pine and bean roots with varying degrees of suberzation, vascular differentation and mycorrhizal infection. Aust. J. Plant Physiol. 9, 959–969.
SteudleE 1989 Water flow in plants and its coupling to other processes: an overview. Methods Enzymol. 174, 183–225.
SteudleE 1992 The biophysics of plant water: compartmentation, coupling with metabolic processes, and water flow in plant roots.In Water and Life: Comparative Analysis of Water Relationships at the Organismic, Cellular, and Molecular Levels. Eds. G NSomero, C BOsmond and C LBolis. pp 173–204. Springer-Verlag, Berlin.
SteudleE 1993a Pressure probe techniques: basic principles and application to studies of water and solute relations at the cell, tissue, and organ level.In Water Deficits: Plant Responses from Cell to Community. Eds. J A CSmith and HGriffith. pp 5–36. Bios Scientific Publishers, Oxford.
Steudle E 1994 Water transport across roots. Plant and Soil 167.
SteudleE and JeschkeW D 1983 Water transport in barley roots. Planta 158, 237–248.
SteudleE, MurrmannM and PetersonC A 1993 Transport of water and solutes across maize roots modified by puncturing the endodermis: further evidence for the composite transport model of the root. Plant Physiol. 103, 335–349.
SteudleE, OrenR and SchulzeE-D 1987 Water transport in maize roots. Plant Physiol. 84, 1220–1232.
TardieuF, KaterjiN, BethenodO, ZhangJ and DaviesW J 1991 Maize stomatal conductance in the field — its relationship with soil and plant water potentials, mechanical constraints and ABA concentration in the xylem sap. Plant Cell Environ. 14, 121–126.
TeskeyR O, HinckleyT M and GrierC C 1983 Effect of interruption of flow path on stomatal conductance ofAbies amabilis. J. Exp. Bot. 34, 1251–1259.
WeatherleyP E 1982 Water uptake and flow in roots.In Encyclopedia of Plant Physiology, Vol. 12B. Eds. O LLange, P SNobel, C BOsmond, and HZiegler. pp 79–109. Springer-Verlag, Berlin.
WhiteP R, SchukerE, KernJ R and FullerF H 1958 Root-pressure in gymnosperms. Science 128, 308–309.
ZhuG L and SteudleE 1991 Water transport across maize roots: simultaneous measurement of flows at the cell and root level by double pressure probe technique. Plant Physiol. 95, 305–315.
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Hallgren, S.W., Rüdinger, M. & Steudle, E. Root hydraulic properties of spruce measured with the pressure probe. Plant Soil 167, 91–98 (1994). https://doi.org/10.1007/BF01587603
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DOI: https://doi.org/10.1007/BF01587603