Abstract
Water conservation is important for plants that maintain physiologically active foliage during prolonged periods of drought. A variety of mechanisms for water conservation exist including stomatal regulation, foliage loss, above- and below-ground allocation patterns, size of xylem vessels and leaf pubescence. Using the results of a field and simulation study with Artemisia tridentata in the Great Basin, USA, we propose an additional mechanism of water conservation that can be used by plants in arid and semi-arid environments following pulses of water availability. Precipitation redistributed more uniformly in the soil column by roots (hydraulic redistribution of water downward) slows the rate at which this water can subsequently be taken up by plants, thus prolonging water availability during periods of drought. By spreading out water more uniformly in the soil column at lower water potentials following precipitation events, water use is reduced due to lower soil conductivity. The greater remaining soil water and more uniform distribution result in higher plant predawn water potentials and transpiration rates later in the drought period. Simulation results indicate that plants can benefit during drought periods from water storage following both summer rain events (small summer pulses) and overwinter recharge (large spring pulse). This mechanism of water conservation may aid in sustaining active foliage, maintaining root-soil hydraulic connectivity, and increasing survival probability of plants which remain physiologically active during periods of drought.
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References
Black RA, Mack RN (1986) Mount St. Helens ash: recreating its effect on the steppe environment and ecophysiology. Ecology 67:1289–1302
Blackman PG, Davies WJ (1985) Root to shoot communication in maize plants and the effects of soil drying. J Exp Bot 36:39–48
Brooks WH, Burgess RL (1979) Ordination analyses in surveys of desert vegetation. In: Bishay A, McGinnies WG (eds) Advances in desert and arid land technology and development, vol. 1. Harwood Academic, Amsterdam, pp 469–487
Burgess SSO, Adams MA, Turner NC, Ong CK (1998) The redistribution of soil water by tree root systems. Oecologia 115:306–311
Burgess SSO, Adams MA, Turner NC, White DA, Ong CK (2001) Tree roots: conduits for deep recharge of soil water. Oecologia 126:158–165
Caldwell MM (1985) Cold desert. In: Chabot BF, Mooney HA (eds) Physiological ecology of North American plant communities. Chapman and Hall, New York, pp 198–212
Caldwell MM, Richards JH (1989) Hydraulic lift: water efflux from upper roots improves effectiveness of water uptake by deep roots. Oecologia 79:1–5
Caldwell MM, Dawson TE, Richards JH (1998) Hydraulic lift: consequences of water efflux from the roots of plants. Oecologia 113:151–161
Campbell GS (1985) Soil physics with basic: transport models for soil–plant systems. Elsevier, Amsterdam
Cohen D (1970) The expected efficiency of water utilization if plants under different competition and selective regimes. Isr J Bot 19:50–54
Comstock JP (2002) Hydraulic and chemical signalling in the control of stomatal conductance and transpiration. J Exp Bot 53:195–200
Davies WJ, Zhang JH (1991) Root signals and the regulation of growth and development of plants in drying soil. Annu Rev Plant Physiol 42:55–76
Davies WJ, Tardeiu F, Trejo CL (1994) How do chemical signals work in plants that grow in drying soil? Plant Physiol 104:309–314
Davis SD, Ewers FW, Sperry JS, Portwood KA, Crocker MC, Adams GC (2002) Shoot dieback during prolonged drought in Ceanothus (Rhamnaceae) chaparral of California: a possible case of hydraulic failure. Am J Bot 89:820–828
Dobrowolski JP, Caldwell MM, Richards JH (1990) Basin hydrology and plant root systems. In: Osmond CB, Pitelka LF, Hidy GM (eds) Plant biology of the basin and range. (Ecological studies vol 80) Springer, Berlin Heidelberg New York, pp 243–292
Donovan LA, Linton MJ, Richards JH (2001) Predawn plant water potential does not necessarily equilibrate with soil water potential under well-watered conditions. Oecologia 129:328–335
Donovan LA, Richards JH, Linton MJ (2003) Magnitude and mechanisms of disequilibrium between predawn plant and soil water potentials. Ecology 84:463–470
Ehleringer JR, Mooney HA (1978) Leaf hairs: effects on physiological activity and adaptive value to a desert shrub. Oecologia 37:183–200
Emerman SH, Dawson TE (1996) Hydraulic lift and its influence on the water content of the rhizosphere: an example from sugar maple, Acer saccharum. Oecologia 108:273–278
Evans RD, Black RA (1993) Growth, photosynthesis, and resource investment for vegetative and reproductive modules of Artemisia tridentata. Ecology 74:1516–1528
Fernandez OA, Caldwell MM (1975) Phenology and dynamics of root growth of three cool semi-desert shrubs under field conditions. J Ecol 63:703–714
Gowing DJ, Davies WJ, Jones HG (1990) A positive root-sourced signal as an indicator of soil drying in apple, Malus × domestica Borkh. J Exp Bot 41:1535–1540
Hacke UG, Sperry JS, Ewers BE, Ellsworth DS, Schafer KVR, Oren R (2000) Influence of soil porosity on water use in Pinus taeda. Oecologia 124:495–505
Hargrave KR, Kolb KJ, Ewers FW, Davis SD (1994) Conduit diameter and drought-induced embolism in Salvia mellifera Greene (Labiatae). New Phytol 126:695–705
Hinkley et al (1978) Hinckley TM, Lassoie JP, Running SW (1978) Temporal and spatial variations in the water status of forest trees. For Sci Monogr 20
Jones HG (1980) Interaction and integration of adaptive responses to water stress: the implications of an unpredictable environ. In: Turner NC, Kramer PJ (eds) Adaptations of plants to water and high temperature. Wiley, New York pp 353–365
Killingbeck KT (1990) Leaf production can be decoupled from root activity in the desert shrub ocotillo (Fouquieria splendens Engelm.). Am Midl Nat 124:124–129
Kolb KJ, Sperry JS (1999a) Transport constraints on water use by the Great Basin shrub, Artemisia tridentata. Plant Cell Environ 22:925–935
Kolb KJ, Sperry JS (1999b) Differences in drought adaptation between subspeices of sagebrush (Artemisia tridentata). Ecology 80:2373–2384
Leffler AJ, Ryel RJ, Hipps L, Ivans S, Caldwell MM (2002) Carbon acquisition and water use in northern Utah Juniperus osteosperma (Utah juniper) population. Tree Physiol 22:1221–1230
Ludwig F, Dawson TE, Kroon H, Berendse F, Prins HHT (2003) Hydraulic lift in Acacia tortilis trees on an East African savanna. Oecologia 134:293–300
MacMahon JA, Wagner FH (1985) The Mojave, Sonoran and Chihuahuan Deserts of North America. In: Evenari M, Noy-Meir I, Goodall DW (eds) Hot deserts and arid shrublands. Ecosystems of the World, vol 12A. Elsevier, Amsterdam, pp 105–202
Noy-Meir I (1973) Desert ecosystems: environment and producers. Annu Rev Ecol Syst 4:25–51
Passioura JB (1988) Water transport in and to roots. Annu Rev Plant Physiol 39:245–265
Portwood KA, Ewers FW, Davis SD, Sperry JS, Adams CG (1997) Shoot dieback in Ceanothus chaparral during prolonged drought—a possible case of catastrophic xylem cavitation. Bull Ecol Soc Am 78:298
Richter GA (1997) Water relations of plants in the field: some comments on the measurement of selected parameters. J Exp Bot 48:1–7
Ritchie GA, Hinckley TM (1975) The pressure chamber as an instrument for ecological research. Adv Ecol Res 9:165–254
Ryel RJ, Caldwell MM, Yoder CK, Or D, Leffler AJ (2002) Hydraulic redistribution in a stand of Artemisia tridentata: evaluation of benefits to transpiration assessed with a simulation model. Oecologia 130:173–184
Ryel RJ, Caldwell MM, Leffler AJ, Yoder CK (2003) Rapid soil moisture recharge to depth by roots in a stand of Artemisia tridentata. Ecology 84:757–764
Saab IN, Sharp RE (1989) Nonhydraulic signals from maize roots in drying soil: inhibition of leaf elongation but not stomatal conductance. Planta 179:466–474
Sandquist DR, Ehleringer JR (1998) Intraspecific variation of drought adaptation in brittlebush: leaf pubescence and timing of leaf loss vary with rainfall. Oecologia 113:162–169
Scholander PF, Hammel HT, Bradstreet ED, Hemmingsen EA (1965) Sap pressure in vascular plants. Science 148:339–346
Schulze E-D (1991) Water and nutrient interactions with plant water stress. In: Mooney HA, Winner WE, Pell EJ (eds) Response of plants to multiple stresses. Academic Press, San Diego, pp 89–101
Slatyer RO (1967) Plant-water relationships. Academic Press, New York
Smith DM, Jackson NA, Roberts JM, Ong CK (1999) Reverse flow of sap in tree roots and downward siphoning of water by Grevillea robusta. Funct Ecol 13:256–264
Smith SD, Monson RK, Anderson JE (1997) Physiological ecology of North American desert plants. Springer, Berlin Heidelberg New York
Smith WK, Nobel PS (1977) Influences of seasonal changes in leaf morphology on water-use efficiency for three desert broadleaf shrubs. Ecology 58:1033–1043
Sperry JS (2000) Hydraulic constraints on plant gas exchange. Agric For Meteorol 104:13–23
Sperry JS, Hacke UG (2002) Desert shrub water relations with respect to soil characteristics and plant functional type. Funct Ecol 16:367–378
Sperry JS, Adler FR, Campbell GS, Comstock JP (1998) Limitations of plant water use by rhizosphere and xylem conductance: results from a model. Plant Cell Environ 21:347–359
Sperry JS, Hacke UG, Oren R, Comstock JP (2002) Water deficits and hydraulic limits to leaf water supply. Plant Cell Environ 25:251–263
Tardieu F, Lafarge T, Simonneau T (1996) Stomatal control by fed or endogenous xylem ABA in sunflower: interpretation of correlations between leaf water potential and stomatal conductance in anisohydric species. Plant Cell Environ 19:75–84
Turner NC (1986) Adaptation to water deficits: a changing perspective. Aust J Plant Physiol 13:175–189
Tyree MT, Cochard H (1996) Summer and winter embolism in oak: Impact on water relations. Ann Sci For 53:173–180
Tyree MT, Ewers FW (1991) The hydraulic architecture of trees and other woody plants. Tansley Review No. 340. New Phytol 119:345–360
Tyree MT, Sperry JS (1989) Vulnerability of xylem to cavitation and embolism. Annu Rev Plant Physiol Mol Biol 40:19–38
Van Genuchten MT (1980) A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci Soc Am J 44:892–898
West NE, Young JA (2000) Vegetation of Intermountain valleys and lower mountain slopes. In: Barbour MA, Billings WD (eds) North American terrestrial vegetation, 2nd edn. Cambridge University Press, New York, pp 255–284
Zhang J, Schurr U, Davies WJ (1987) Control of stomatal behavior by abscisic acid which apparently originates in roots. J Exp Bot 38:1174–1181
Acknowledgements
This work was funded by the National Science Foundation (DEB-9807097) and the Utah Agricultural Experiment Station. We thank Ann Mull for her excellent field assistance, Charles Ashurst for his electronics expertise, and Darrell Johnson for allowing us to establish our study site on his property in Rush Valley, Utah.
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Ryel, R.J., Leffler, A.J., Peek, M.S. et al. Water conservation in Artemisia tridentata through redistribution of precipitation. Oecologia 141, 335–345 (2004). https://doi.org/10.1007/s00442-003-1421-2
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DOI: https://doi.org/10.1007/s00442-003-1421-2