Abstract
The elongation rate, the gradient of the local elongation rate and the surface pH of maize roots were measured over 12 h. A data bank was constituted by storing these values. By sorting these results on the basis of different elongation rates, different classes of root were obtained. Two classes were chosen: the low-growth roots and the high-growth roots. The mean growth of these two root classes was stable with time and differed significantly from one another. The surface pH of the elongation zone was the same for the roots of these two classes, but the roots selected for their higher growth rate had a larger acid efflux in this zone.
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Beffa, R., Pilet, P.E. (1982) Growth and gravireaction of illuminated maize roots: kinetic analysis. Z. Pflanzenphysiol. 107, 443–452
Edwards, K., Scott, T.K. (1974) Rapid growth responses of corn root segments. Effect of pH on elongation. Planta 119, 27–37
Erikson, R.O. (1976) Modeling of Plant growth. Annu. Rev. Plant. Physiol. 27, 407–434
Erikson, R.O., Goddard, D.R. (1951) An analysis of root growth in cellular and biochemical terms. Growth 15 (Suppl.) 89–116
Franssen, J.M., Cooke, S.A., Digby, J., Firn, R.D. (1981) Measurements of differential growth causing phototropic curvature of coleoptiles and hypocotyls. Z. Pflanzenphysiol. 103, 207–216
Franssen, J.M., Firn, R.D., Digby, J. (1982) The role of the apex in the phototropic curvature of Avena coleoptiles: positive curvature under conditions of illumination. Planta 155, 281–286
Gabella, M., Pilet, P.E. (1978) Effect of pH on georeaction and elongation of maize root segments. Physiol. Plant. 44, 157–160
Gandar, P.W. (1983) Growth in root apices. I. The kinematic description of growth. Bot. Gaz. 144, 1–10
Gandar, P.W. (1983) Growth in root apices. II. Deformation and rate deformation. Bot. Gaz. 144, 11–19
Goodwin, R.H., Stepka, W. (1945) Growth and differentiation in the root tip of Phleum pratense. Am. J. Bot. 32, 36–46
Hager, A., Menzel, H., Krauss, A. (1971) Versuche und Hypothese zur Primärwirkung des Auxins beim Streckungs-wachstum. Planta 100, 47–75
Hejnowicz, Z., Heinemann, B., Sievers, A. (1977) Tip growth: patterns of growth rate and stress in the Chara rhizoid. Z. Pflanzenphysiol. 81, 424–494
Marschner, H., Romheld, V., Ossenberg-Neuhans, H. (1982) Rapid method for measuring changes in pH and reducing processes along roots of intact plants. Z. Pflanzenphysiol. 105, 407–416
Moloney, M.M., Elliott, M.C., Cleland, R.E. (1981) Acid-growth effects in maize roots: Evidence for a link between auxin economy and proton extrusion in the control of root growth. Planta 152, 285–291
Moloney, M.M., Pilet, P.E., Marre, M.T., Romani, G. (1982) Transmembrane electrical potentials in growing maize roots. Planta 156, 407–412
Mulkey, T.J., Kuzmanoff, K.M., Evans, M.L. (1981) Correlations between proton-efflux patterns and growth patterns during geotropism and phototropism in maize and sunflower. Planta 152, 239–241
Mulkey, T.J., Evans, M.L., Kuzmannof, K.M. (1983) The kinetics of abcissic acid action, growth and gravitropism. Planta 157, 150–157
Pilet, P.E. (1960) Gradients de croissance et problèmes auxiniques. I. Critères de référence. Bull. Soc. Bot. Suisse 70, 268–296
Pilet, P.E. (1961) Gradients de croissance et problèmes auxiniques. II. Etats statique et dynamique. Bull. Soc. Bot. Suisse 71, 25–40
Pilet, P.E. (1977) Growth inhibitors in growing and geostimulated maize roots. In: Plant growth regulation, pp, 115–128, Pilet, P.E., ed. Springer, Berlin Heidelberg New York
Pilet, P.E. (1979) Kinetics of the light-induced georeactivity of maize roots. Planta 145, 403–404
Pilet, P.E., Senn, F.A. (1980) Root growth gradients: A critical analysis. Z. Pflanzenphysiol. 99, 121–130
Pilet, P.E., Versel, J.M., Mayor, G. (1983) Growth distribution and surface pH patterns along maize roots. Planta 158, 398–402
Rayle, D.L., Cleland, R.E. (1970) Enhancement of wall loosening and elongation by acid solutions. Plant Physiol. 46, 250–253
Rayle, D.L., Cleland, R.E. (1977) Control of plant cell enlargement by hydrogen ions. Curr. Top. Dev. Biol. 11, 187–214
Sachs, J. (1873) Über das Wachstum der Haupt- und Nebenwurzeln. Arb. Bot. Inst. Würzburg 1, 385–474
Weisenseel, M.H., Dorn, A., Jaffe, L.F. (1979) Natural H currents traverse growing roots and root hairs of barley (Hordeum vulgare L.). Plant Physiol. 64, 512–518
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Versel, JM., Mayor, G. Gradients in maize roots: local elongation and pH. Planta 164, 96–100 (1985). https://doi.org/10.1007/BF00391031
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DOI: https://doi.org/10.1007/BF00391031