Abstract
The water uptake region in roots is several hundred times longer than the root diameter. The distributed nature of the uptake zone requires that the hydraulic design of roots be understood by analogy to flow through a “porous pipe.” Here we present results of an analytical and experimental investigation that allowed an in-depth analysis of root hydraulic properties. Measurements on nodal maize roots confirm the nonlinear distribution of water uptake predicted by the porous pipe model. The major design parameter governing the distribution of water uptake along a porous pipe is the ratio between its axial and radial hydraulic resistance. However, total flow is proportional to the pipe's overall resistance. These results suggest the existence of a tradeoff between the effective utilization of root length and the total capacity for water uptake.
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References
MS Bret–Harte WK Silk (1994) ArticleTitleNonvascular, symplasmic diffusion of sucrose cannot satisfy the carbon demands of growth in the primary root-tip of Zea mays L. Plant Physiol 105 19–33 Occurrence Handle12232183
RM Bringhurst ZG Cardon DJ Gage (2001) ArticleTitleGalactosides in the rhizosphere: utilization by Sinorhizobium meliloti and development of a biosensor. Proc Nat Acad Sci 98 4540–4545 Occurrence Handle1:CAS:528:DC%2BD3MXjtVagtLo%3D Occurrence Handle10.1073/pnas.071375898 Occurrence Handle11274355
MM Caldwell (1976) Root extension and water absorption. OL Lange L Kappen E-D Schulze (Eds) Water and Plant Life: Problems and Modern Approaches. Ecological Studies 19. Springer-Verlag New York 63–85
DM Eissenstat RD Yanai (1997) ArticleTitleThe ecology of root lifespan. Adv Ecol Res 27 1–60 Occurrence Handle10.1016/S0065-2504(08)60005-7
DE Enstone CA Peterson (1998) ArticleTitleEffects of exposure to humid air on epidermal viability and suberin deposition in maize (Zea mays L.) roots. Plant Cell Environ 21 837–844 Occurrence Handle1:CAS:528:DyaK1cXmsVerur8%3D Occurrence Handle10.1046/j.1365-3040.1998.00310.x
K Esau (1977) Anatomy of Seed Plants, 2nd ed. John Wiley & Sons New York 767
J Frensch E Steudle (1989) ArticleTitleAxial and radial hydraulic resistance to roots of maize (Zea mays L.). Plant Physiol 91 719–726 Occurrence Handle1:STN:280:DC%2BC3cnhvFansQ%3D%3D Occurrence Handle10.1104/pp.91.2.719 Occurrence Handle16667092
M Haussling CA Jorns G Lehmbecker C Hecht–Buchholz H Marschner (1988) ArticleTitleIon and water uptake in relation to root development in Norway spruce (Picea abies (L.) Karst). J Plant Physiol 133 486–491
TC Hsiao LK Xu (2000) ArticleTitleSensitivity of growth of roots versus leaves to water stress: biophysical analysis and relation to water transport. J Exp Bot 51 1595–1616 Occurrence Handle1:CAS:528:DC%2BD3cXnt12ju7w%3D Occurrence Handle10.1093/jexbot/51.350.1595 Occurrence Handle11006310
PJ Kramer JS Boyer (1995) Water Relations of Plant and Soil. Academic Press San Diego 495
PJ Kramer HC Bullock (1966) ArticleTitleSeasonal variation in the proportions of suberized and unsuberized roots of trees in relation to the absorbed water. Am J Bo 53 200–204 Occurrence Handle10.2307/2440089
JJ Landsberg ND Fowkes (1978) ArticleTitleWater movement through plant roots. Ann Bot 42 493–508
JS MacFall GA Johnson PJ Kramer (1991) ArticleTitleComparative water uptake by roots of different ages in seedlings of loblolly pine (Pinus taeda L.). New Phytol 119 551–560 Occurrence Handle10.1111/j.1469-8137.1991.tb01047.x
W Melchior E Steudle (1993) ArticleTitleWater transport in onion (Allium cepa L.) roots. Plant Physiol 101 1305–1315 Occurrence Handle1:CAS:528:DyaK3sXisFWmtrw%3D Occurrence Handle12231786
SH Munson–McGee (2002) ArticleTitleAn approximate analytical solution for the fluid dynamics of laminar flow in a porous tube. J Membr Sci 197 223–230 Occurrence Handle10.1016/S0376-7388(01)00634-2
JB Passioura (1984) ArticleTitleHydraulic resistance of plants. I. Constant or variable? Aust J Plant Physiol 11 333–339 Occurrence Handle10.1071/PP9840333
CA Peterson DE Enstone (1996) ArticleTitleFunctions of passage cells in the endodermis and exodermis of roots. Physiol Plant 97 592–598 Occurrence Handle1:CAS:528:DyaK28Xktl2gt74%3D Occurrence Handle10.1111/j.1399-3054.1996.tb00520.x
CA Peterson M Murrmann E Steudle (1993) ArticleTitleLocation of the major barriers to water and ion movement in young roots of Zea mays L. Planta 190 127–136 Occurrence Handle1:CAS:528:DyaK3sXitlSns7s%3D Occurrence Handle10.1007/BF00195684
CA Peterson E Steudle (1993) ArticleTitleLateral hydraulic conductivity of early metaxylem vessels in Zea mays L. roots. Planta 189 288–297 Occurrence Handle10.1007/BF00195088
G St. Aubin MJ Canny ME McCully (1995) ArticleTitleLiving vessel elements in the late metaxylem of sheathed maize roots. Ann Bot 58 577–588
E Steudle (1995) ArticleTitleWater transport across roots. Plant Soil 167 79–90 Occurrence Handle10.1007/BF01587602
E Steudle M Murrmann CA Peterson (1993) ArticleTitleTransport 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 Occurrence Handle1:CAS:528:DyaK2cXkslKl Occurrence Handle12231941
E Steudle R Oren E-D Schulz (1987) ArticleTitleWater transport in maize roots. Plant Physiol 84 1220–1232 Occurrence Handle1:CAS:528:DyaL2sXltlWjsL8%3D Occurrence Handle10.1104/pp.84.4.1220 Occurrence Handle16665588
RJ Stirzaker JB Passioura (1996) ArticleTitleThe water relations of the root–soil interface. Plant Cell Environ 19 201–208 Occurrence Handle10.1111/j.1365-3040.1996.tb00241.x
JG Torrey DT Clarkson (1975) The Development and Function of Roots. Academic Press New York 618
DS Van Fleet (1961) ArticleTitleHistochemistry, and function of the endodermis. Bot Rev 27 165–221 Occurrence Handle1:CAS:528:DyaF3MXovVamsA%3D%3D Occurrence Handle10.1007/BF02860082
JCJ Van Rees NB Comerford (1990) ArticleTitleThe role of woody roots of slash pine seedlings in water and potassium absorption. Can J Forest Res 20 1183–1191 Occurrence Handle1:CAS:528:DyaK3cXlvVyitrw%3D Occurrence Handle10.1139/x90-157
GT Varney ME McCully MJ Canny (1993) ArticleTitleSites of entry of water into the symplast of maize roots. New Phytol 125 733–741 Occurrence Handle10.1111/j.1469-8137.1993.tb03922.x
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This work was supported by The Andrew W. Mellon Foundation. We thank Zoe Cardon for helpful comments during the manuscript preparation.
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Zwieniecki, M.A., Thompson, M.V. & Holbrook, N.M. Understanding the Hydraulics of Porous Pipes: Tradeoffs Between Water Uptake and Root Length Utilization . J Plant Growth Regul 21, 315–323 (2002). https://doi.org/10.1007/s00344-003-0008-9
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DOI: https://doi.org/10.1007/s00344-003-0008-9