Summary
The sprouting of aerial tubers of Begonia evansiana was promoted by treatment with morphactin. As with cytokinins, the promotion of sprouting occurred in both the immature and mature tubers. Unlike cytokinins, however, morphactin did not stimulate tuber enlargement. The sprout-inhibiting action of applied gibberellin (GA) was overcome by morphactin. The possible mechanism of the inhibitory action of GA is diseussed in relation to apical dominance.
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Cho, S.: Response to gibberellic acid of the sterile-cultured buds of Begonia aerial tubers. Sci. Rep. Tohoku Univ., 4th Ser. (Biol.) 35, 139–148 (1970).
Esashi, Y.: Studies on the formation and sprouting of aerial tubers in Begonia evansiana Andr. IV. Cutting method and tuberizing stages. Sci. Rep. Tohoku Univ. 4th Ser. (Biol.) 26, 239–246 (1960).
Esashi, Y.: The relation between light and temperature effects in the induction and release of dormancy in the aerial tuber of Begonia evansiana. Plant and Cell Physiol. 10, 583–595 (1969).
Esashi, Y., Cho, S., Okagami, N., Nagao, M.: Dormancy and plant hormones in the aerial tubers of Begonia evansiana. Proc. Internat. Sem. on Physiology of Differentiation in Plants, Shimura, 1971, in press.
Esashi, Y., Leopold, A. C.: Regulation of tuber development in Begonia evansiana by cytokinin. In: Biochemistry and physiology of plant growth substances. p. 923–941, F. Wightman and G. Setterfield, eds. Ottawa: Runge Press 1968.
Krelle, E., Libbert, E.: Wirkung eines Morphactins auf die Amylase-Synthese in Gerstenendosperm. Planta (Berl.) 76, 179–181 (1967).
Lang, A.: Gibberellins: Structure and metabolism. Ann. Rev. Plant Physiol. 21, 537–570 (1970).
Mann, J. D., Hield, H., Yung, K. H., Johonson, D.: Independence of morphactin and gibberellin effects upon higher plants. Plant Physiol. 41, 1751–1752 (1966).
Nagao, M., Mitsui, E.: Studies on the formation and sprouting of aerial tubers in Begonia evansiana Andr. III. Effect of gibberellin on the dormancy of aerial tubers. Sci. Rep. Tohoku Univ., 4th Ser. (Biol.) 25, 199–205 (1959).
Nagao, M., Okagami, N.: Effect of (2-chloroethyl)trimethylammonium chloride on the formation and dormancy of Begonia evansiana. Bot. Mag. (Tokyo) 79, 687–692 (1966).
Nanda, K. K., Purohit, A. N., Kaura, N.: Effect of morphactin, gibberellic acid and auxin on growth and development of Bryophyllum tubiflorum. Physiol. Plantarum (Cph.) 23, 591–598 (1970).
Okagami, N., Nagao, M.: Gibberellin-induced dormancy in bulbils of Dioscorea. Planta (Berl.) 101, 91–94 (1971).
Sankhla, N., Sankhla, D.: Morphactin-kinetin interaction in lettuce seed germination and seedling growth. Planta (Berl.) 76, 47–51 (1967).
Schneider, G.: Morphactins: Physiology and performance. Ann. Rev. Plant Physiol. 21, 499–536 (1970).
Schott, H.-H., Schraudorf, H.: Die Wirkung einiger Derivate der 9-Fluorenol-9-Carbonsäure auf die Regeneration von Begonienblattachenien (Begonia Rex). Z. Pflanzenphysiol. 56, 387–396 (1967).
Scott, T. K., Case, D. B., Jacobs, W. P.: Auxin-gibberellin interaction in apical dominance. Plant Physiol. 42, 1329–1333 (1967).
Tognoni, F., Hertogh, A. A. de, Wittwer, S. H.: The independent actions of morphactin and gibberellic acid on higher plants. Plant and Cell Physiol. 8, 231–239 (1967).
Ziegler, H., Köhler, D., Streitz, B.: Ist 2-chloro-9-fluorenol-9-carbonsäure ein Gibberellin-antagonist? Z. Pflanzenphysiol. 54, 118–124 (1966).
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Okagami, N., Esashi, Y. Dormancy regulation by morphactin in aerial tubers of Begonia evansiana . Planta 104, 195–200 (1972). https://doi.org/10.1007/BF00387074
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DOI: https://doi.org/10.1007/BF00387074