Summary
The influence of irrigation and nitrogen fertilization in early summer on root and shoot growth of Atriplex confertifolia, a C4 shrub species, was examined in a cold-winter desert community in northern Utah. Soil water and xylem pressure potentials were monitored during the summer period.
At the time of watering the surface soil (0–30 cm) was dry but there were turgid fine roots in this horizon. Watering of the soil reduced plant water stress from-30 to-15 bars (dawn values) indicating that roots near the surface were capable of absorbing water, and induced root growth in the 0–30 cm zone. The addition of N to the water treatment did not further increase root production. However, watering and watering +N fertilizer failed to stimulate shoot elongation or any dry weight increase of shoots. This shoot dormancy during summer is not typical of C4 plants and is probably associated with adaptation to the cool arid environment.
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References
Adams, M.S., Strain, B.R.: Seasonal photosynthetic rates in stems of Cercidium floridum Benth. Photosynthetica 3, 55–62 (1969)
Branson, F.A., Miller, R.F., McQueen, I.S.: Moisture relationships in twelve northern desert shrub communities near Grand Junction, Colorado. Ecology 57, 1104–1124 (1976)
Caldwell, M.M.: Adaptability and productivity of species possessing C3 and C4 photosynthesis in a cool desert environment, pp. 27–29. In: Ecophysiological foundation of ecosystems productivity in arid zone (L.E. Rodin, ed). Leningrad: USSR Acad. Sci. 1972
Caldwell, M.M., Osmond, C.B., Nott, D.L.: C4 pathway photosynthesis at low temperature in cold-tolerant Atriplex species. Plant Physiol. 60, 157–164 (1977)
Caldwell, M.M., White, R.S., Moore, R.T., Camp, L.B.: Carbon balance, productivity, and water use of cold-winter desert shrub communities dominated by C3 and C4 species. Oecologia (Berl.) 29, 275–300 (1977)
Cary, J.W.: Energy levels of water in a community of plants as influenced by soil moisture. Ecology 52, 710–715 (1971)
Charley, J.L., West, N.E.: Plant-induced soil chemical patterns in some shrub dominated semi-desert ecosystems of Utah. J. Ecol. 63, 945–963 (1975)
Cowling, S.W.: A study of vegetation activity patterns in a semi-arid environment. Ph.D. Thesis, Univ. New England, N.S.W., Australia (1969)
Fernandez, O.A., Caldwell, M.M.: Phenology and dynamics of root growth of three cool semi-desert shrubs under field conditions. J. Ecol. 63, 703–714 (1975)
Goodall, D.W.: Computer simulation of changes in vegetation subject to grazing. J. Indian Bot. Soc. 46, 356–362 (1967)
Goodman, P.J.: Physiological and ecotypic adaptations of plants to salt desert conditions in Utah. J. Ecol. 61, 473–494 (1973)
Holmgren, R.C., Brewster, S.F.: Distribution of organic matter reserves in a desert shrub community. USDA For. Serv. Res. Pap. INT 130 15 pp. Intermountain For. & Range Exp. Sta., Ogden, Utah (1972)
Jones, R., Hodgkinson, K.C., Rixon, A.J.: Growth and productivity in rangeland species of Atriplex. In: The biology of Atriplex (R. Jones, ed.). Canberra: CSIRO 1970
Marsh, B.a'B.: Measurement of length on random arrangement of lines. J. Appl. Ecol. 8, 265–267 (1971)
Moore, R.T., White, R.S., Caldwell, M.M.: Transpiration of Atriplex confertifolia and Eurotia lanata in relation to soil, plant and atmospheric moisture stresses. Can. J. Bot. 50, 2411–2418 (1972)
Newman, I.: A method of estimating the total length of root in a sample. J. Appl. Ecol. 3, 139–145 (1966)
Noy-Meir, I.: Desert ecosystems: environment and producers. Ann. Rev. Ecol. Syst. 4, 25–51 (1973)
Ritchie, G.A., Hinckley, T.M.: The pressure chamber as an instrument for ecological research. Adv. Ecol. Res. 6, 165–254 (1975)
Welkie, G.W., Caldwell, M.M.: Leaf anatomy of species in some dicotyledon families as related to the C3 and C4 pathways of carbon fixation. Can. J. Bot. 48, 2135–2146 (1970)
Went, F.W.: Ecology of desert plants. II. The effect of rain and temperature on germination and growth. Ecology 30, 1–13 (1949)
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This work was carried out while the senior author was on study leave from CSIRO
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Hodgkinson, K.C., Johnson, P.S. & Norton, B.E. Influence of summer rainfall on root and shoot growth of a cold-winter desert shrub, Atriplex confertifolia . Oecologia 34, 353–362 (1978). https://doi.org/10.1007/BF00344912
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DOI: https://doi.org/10.1007/BF00344912