Summary
Either a 0.25% or a 0.007% IAA paste was smeared on the apical cut surface of decapitated pea epicotyls and simultaneously 32P was added to the roots. When subsequently the radioactivity of the apical segment of the epicotyls was measured at different time intervals following the addition of 32P, no significant differences between the effect of 0.25 and 0.007% IAA paste on 32P transport were found. Because the 0.25% IAA paste completely retards the growth of cotylary buds whereas the 0.007% paste supports this growth, it might appear that the effect of 0.25% IAA paste on the transport of nutrient substances plays a decisive role in the apical dominance. More probably 0.25% IAA paste imitates the apical dominance only by means of its toxic effect, which, however, requires a detailed investigation.
Literatur
Davies, C. R., and P. F. Wareing: Auxin-directed transport of radiophosphorus in stems. Planta (Berl.) 65, 139–156 (1965).
Nakamura, E.: Effect of decapitation and indole-3-acetic acid on the distribution of radioactive phosphorus in the stem of Pisum sativum. Plant and Cell Physiol. 5, 521–524 (1964).
Šebánek, J.: Effect of the amputation of the cotyledon and of the application of growth regulators on the transport of 32P in decapitated pea seedlings. Biologia Plantarum (Praha) 7, 380–386 (1965).
—: Interaction of indoleacetic acid with synthetic and native growth regulators during transfer of 32P into epicotyls of etiolated pea seedlings. Biologia Plantarum (Praha) 8, 213–219 (1966).
Šebánek, J.: Investigation of apical dominance in pea seedlings by means of 32P transport. Acta Univ. Agr. (Brno) a (1967) (in press).
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Šebánek, J. Einfluß von Pasten mit verschiedenen Indolylessigsäure-Konzentrationen auf den Transport von 32P in dekapitierten Erbsenepikotylen. Planta 75, 283–285 (1967). https://doi.org/10.1007/BF00386328
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DOI: https://doi.org/10.1007/BF00386328