Summary
Indole-3-acetic acid (IAA) applied to the fully elongated second internode of decapitated Phaseolus multiflorus plants always inhibited axillary bud elongation at concentrations down to 100 μg/g lanolin, whereas gibberellic acid (GA3) enhanced bud elongation at concentrations down to 1000 μg/g lanolin. Lower concentrations than these of either IAA or GA3 were without significant effect. All possible combinations of IAA and GA3 within the concentration range 101 to 105 μg/g lanolin were antagonistic; IAA tending to inhibit, and GA3 promote, axillary bud elongation growth. Treatment of an elongating internode with the hormones resulted in an increase in inhibition of bud growth by IAA in the presence of GA3.
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References
Catalano, M., Hill, T. A.: Interaction between gibberellic acid and kinetin in overcoming apical dominance, natural and induced by 1AA, in tomato (Lycopersicum esculentum Mill. Cultivar Potentate). Nature (Lond.) 222, 985–986 (1969).
Hillman, J.: The hormonal regulation of bud outgrowth in Phaseolus vulgaris L. Planta (Berl.) 90, 222–229 (1970).
Jacobs, W. P.: Longevity of plant organs: Internal factors controlling abscission. Ann. Rev. Plant. Physiol. 13, 403–436 (1962).
—, Bullwinkel, B.: Compensatory growth in Coleus shoots. Amer. J. Bot. 40, 385–392 (1953).
—, Case, D. B.: Auxin transport, gibberellin and apical dominance. Science 148, 1729–1731 (1965).
Jones, R. L., Phillips, I. D. J.: Organs of gibberellin synthesis in light-grown sunflower plants. Plant Physiol. 41, 1381–1386 (1966).
Kato, J.: Studies on the physiological effect of gibberellin: II. On the interaction of gibberellin with auxins and growth inhibitors. Physiol. Plantarum (Cph.) 11, 10–15 (1958).
Nakamura, E.: Studies on the branching in Pisum sativum L. Special Report of the Laboratory of Horticulture, Shiga Agric. Coll., Japan (1965).
Phillips, I. D. J.: Nitrogen, phosphorus and potassium distribution in relation to apical dominance in dwarf bean (Phaseolus vulgaris c.v. Canadian Wonder). J. exp. Bot. 19, 617–627 (1968).
—: Apical dominance. In: The physiology of plant growth and development, p. 163–202 (M. B. Wilkins, ed.). London: McGraw-Hill 1969a.
—: Auxin-gibberellin interaction in apical dominance: Experiments with tall and dwarf varieties of pea and bean. Planta (Berl.) 86, 315–323 (1969b).
Phillips, I. D. J.: Factors influencing the distribution of growth between stem and axillary buds in decapitated bean plants (in preparation).
Scott, T. K., Case, D. B., Jacobs, W. P.: Auxin-gibberellin interaction in apical dominance. Plant Physiol. 42, 1329–1333 (1967).
—, Pritchard, J. B.: The control of apical dominance in the Alaska pea. In: transport of plant hormones, p. 309–319. Amsterdam: North-Holland Publ. Comp. 1968.
Šebánek, J.: Investigation of apical dominance in pea seedlings by means of 32P transport. Acta Univ. Agr. (Brno) A. 4, 587–596 (1966).
Snedecor, G. W.: Statistical methods. Iowa: State Univ. Press 1962.
Wickson, M. E., Thimann, K. V.: The antagonism of auxin and kinetin in apical dominance. Physiol. Plantarum (Cph.) 11, 62–74 (1958).
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Phillips, I.D.J. Effect of relative hormone concentration on auxin-gibberellin interaction in correlative inhibition of axillary buds. Planta 96, 27–34 (1971). https://doi.org/10.1007/BF00397901
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DOI: https://doi.org/10.1007/BF00397901