Abstract
Plants of Hordeum vulgare (barley) were grown initially in a solution containing 150 μM phosphate and then transferred on day 6 to solutions with (+P) and without (-P) phosphate supplied. After various times plants from these treatments were supplied with labelled phosphate. Analysis of plant growth and rates of labelled phosphate uptake showed that a general enhancement of uptake and translocation was found, in plants which had been in the-P solution, several days before the rate of dry matter accumulation was affected. Subsequently a detailed analysis of phosphate uptake by segments of intact root axes showed that the enhancement of phosphate uptake by P-stress occurred first in the old and mature parts of the seminal root axis and last in the young zones 1 cm from the root apex. During this transition period there were profound changes in the pattern of P absorption along the length of the root. Most of the additional P absorbed in response to P-stress was translocated to the shoot, particularly in older zones of the axis. Enhancement of phosphate uptake in young zones of nodal axes occurred at an earlier stage than in seminal axes. The results are related to the P-status of shoots and root zones and discussed in relation to the general control by the shoot of phosphate transport in the root.
Similar content being viewed by others
References
Bowen, G.D.: Effects of soil temperature on root growth and on phosphate uptake along Pinus radiata roots. Aust. J. Soil Res. 8, 31–42 (1970)
Bowen, G.D.: Early detection of phosphorus deficiency in plants. Soil Sci. Pl. Anal. 1, 293–298 (1970b)
Bowen, G.D., Rovira, A.D.: Phosphate uptake along attached and excised wheat roots measured by an automatic scanning method. Aust. J. Biol. Sci. 20, 369–378 (1967)
Cartwright, B.: The effect of phosphate deficiency on the kinetics of phosphate absorption by sterile excised barley roots, and some factors affecting the ion uptake efficiency of roots. Soil Sci. Pl. Anal. 3, 313–322 (1972)
Claassen, N., Barber, S.A.: Potassium influx characteristics of corn roots and interaction with N, P, Ca and Mg influx. Agron. J. (In press)
Clarkson, D.T.: Phosphorus supply and growth rate in species of Agrostis L. J. Ecol 55, 111–118 (1967)
Clarkson, D.T., Sanderson, J.: Relationship between the anatomy of cereal roots and the absorption of nutrients and water. Agricultural Research Council Letcombe Laboratory, Report 1970, 16–25 (1971)
Clarkson, D.T., Robards, A.W., Sanderson, J.: The tertiary endodermis in barley roots: fine structure in relation to radial transport of ions and water. Planta 96, 292–305 (1971)
Clarkson, D.T., Sanderson, J., Russell, R.S.: Ion uptake and root age. Nature 220, 805–806 (1968)
Drew, M.C., Saker, L.R.: Nutrient supply and the growth of the seminal root system in barley. III. Compensatory increases in growth of lateral roots, and in rates of phosphate uptake, in response to a localized supply of phosphate. J. exp. Bot. (in press)
Eshel, A., Waisel, Y.: Heterogeneity of ion uptake mechanisms along primary roots of maize seedlings. In: Ion Transport in Plants, pp. 531–537, Anderson, W.P., ed. London: Academic Press 1973
Ferguson, I.B., Clarkson, D.T.: Ion transport and endodermal suberization in the roots of Zea mays. New Phytol. 75, 69–79 (1975)
Hackett, C.: A study of the root system of harley, I. Effects of nutrition on two varieties. New Phytol. 67, 287–300 (1968)
Higinbotham, N.: The mineral absorption process in plants. Bot. Rev. 39, 15–69 (1973)
Hoffmann, W.E.: Mineralstofftransport der Wurzel in Abhängigkeit von ihrem K- und P-Status. Landwirtsch. Forsch. 21, 203–212 (1968)
Humphries, E.C.: The absorption of ions by excised root systems. II. Observations on roots of barley grown in solutions deficient in phosphorus, nitrogen or potassium. J. exp. Bot. 2, 344–379 (1951)
Jungk, A., Barber, S.A.: Plant age and phosphorus uptake oharacteristics of trimmed and untrimmed corn root systems. Plant and Soil 42, 227–239 (1976)
Mazel, Y.Y.: Absorption of ions by different parts of the root. Fiziol. Rast. 22, 1055–1068 (1975)
Mengel, D.B., Barber, S.A.: Rate of nutrient uptake per unit of root by corn grown under field conditions. Agron. J. 66, 399–402 (1974)
Pitman, M.G.: Uptake and transport of ions in barley seedlings. III. Correlation between transport to the shoot and relative growth rate. Aust. J. Biol. Sci. 25, 905–919 (1972)
Powell, C.L.: Effects of P fertilizer on root morphology and P uptake by Carex coriacea. Plant and Soil 41, 661–667 (1974)
Robards, A.W., Clarkson, D.T.: the role of plasmodesmata in the transport of water and nutrients across roots. In: Intercellular communication in Plants: studies on plasmodesmata, p. 181–199. Gunning, B.E.S., Robards, A.W., eds. Berlin-Heidelberg-New York: Springer 1976
Robards, A.W., Jackson, S.M., Clarkson, D.T., Sanderson, J.: The structure of barley roots in relation to the transport of ions into the stele. Protoplasma 77, 291–312 (1973)
Russell, R.S., Martin, R.P.: A study of the absorption and utilization of phosphate by young barley plants. I. The effect of external concentration on the distribution of absorbed P between roots and shoots. J. exp. Bot. 4, 108–127 (1953)
Russell, R.S., Sanderson, J.: Nutrient uptake by different parts of the intact roots of plants. J. exp. Bot. 18, 491–508 (1967)
Stryker, R.B., Gilliam, J.W., Jackson, W.A.: Non-uniform Phosphorus uptake. Soil Sci. Soc. Amer. Proc. 38, 334–340 (1974)
Warncke, D.D., Barber, S.A.: Root development and nutrient uptake by corn grown in solution culture. Agron. J. 66, 514–516 (1974)
Wiebe, H.H., Kramer, P.J.: Translocation of radioactive isotopes from various regions of roots of barley seedlings. Plant Physiol. 29, 342–348 (1954)
Williams, R.F.: The effects of phosphorus supply on the rates of intake of phosphorus metabolism in graminaceous plants. Aust. J. Sci. Res. B 1, 333–361 (1948)
Yakovlev, A.A.: Differentiation of the primary embryonic root of maize with respect to uptake, spreading, bonding and liberation of certain ions. Soviet Plant Physiol. 17, 379–383 (1970)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Clarkson, D.T., Sanderson, J. & Scattergood, C.B. Influence of phosphate-stress on phosphate absorption and translocation by various parts of the root system of Hordeum vulgare L. (barley). Planta 139, 47–53 (1978). https://doi.org/10.1007/BF00390809
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00390809