Summary
Paris of tracers were applied simultaneously to the long thin stolons of Saxifraga sarmentosa. After several hours of translocation the very precise pattern of exponential fall-off was examined and interpreted in the light of a model of mass flow with leakage. 42K appears to leak faster than 22Na; 86Rb is very close to 42K. The anion 82Br shows a lower fall-off than 137Cs; this is tentatively regarded as due to a much-reduced leakage, though it might imply a higher velocity. The implications of these findings for sieve-tube mechanism are uncertain.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Biddulph, O., Cory, R.: An analysis of translocation in the phloem of the bean plant using THO, P32 and C14. Plant Physiol. 32, 608–619 (1957).
Bukovac, M. J., Wittwer, S. H.: Absorption and mobility of foliar-applied nutrients. Plant Physiol. 32, 428–435 (1957).
Cataldo, D. A., Christy, A. L., Coulson, C. L.: Solution-flow in the phloem. II Phloem transport of THO in Beta vulgaris. Plant Physiol. 49, 690–695 (1972).
Dainty, J.: Ion transport and electrical potentials in plant cells. Ann. Rev. Plant Physiol. 13, 379–402 (1962).
Hope, A. B., Walker, N. A.: Ionic relations of Chara australis IV. Aust. J. biol. Sci. 14, 26–44 (1961).
Horwitz, L.: Some simplified mathematical treatments of translocation in plants. Plant Physiol. 33, 81–93 (1958).
MacRobbie, E. A. C.: Phloem translocation. Facts and mechanisms: a comparative survery. Biol. Rev. 46, 429–481 (1971).
MacRobbie, E. A. C., Dainty, J.: Ion transport in Nitellopsis obtusa. J. gen. Physiol. 42, 335–353 (1958).
Qureshi, F. A., Spanner, D. C.: Unidirectional movement of tracers along the stolon of Saxifraga sarmentosa. Planta (Berl.) 101, 133–146 (1971).
Qureshi, F. A., Spanner, D. C.: Movement of [14C] sucrose along the stolon of Saxifraga sarmentosa. Planta (Berl.) 110, 145–152 (1973).
Spanner, D. C., Jones, R. L.: The sieve tube wall and its relation to translocation. Planta (Berl.) 92, 64–72 (1970).
Spanner, D. C., Prebble, J. N.: The movement of tracers along the petiole of Nymphoides peltatum I. J. expt. Bot. 13, 294–306 (1962).
Spanswick, R. M., Stolarek, J., Williams, E. J.: The membrane potential of Nitella translucens. J. expt. Bot. 18, 1–16 (1967).
Swanson, C. A., Whitney, J. B.: Studies on the translocation of foliar-applied P32 and other radioisotopes in bean plants. Amer. J. Bot. 40, 816–823 (1953).
Author information
Authors and Affiliations
Additional information
This work formed part of that submitted for the degree of Ph.D. of the University of London.
Rights and permissions
About this article
Cite this article
Qureshi, F.A., Spanner, D.C. The simultaneous movement of two ions in the phloem of the Saxifraga stolon. Planta 112, 121–128 (1973). https://doi.org/10.1007/BF00388582
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00388582