Abstract
Morphactin (100 ppm) treated plants of soybean (Glycine max L. Cv. Bragg) were studied for morphological, anatomical changes and for the endogenous levels of cytokinins. The reduction in internodal length was drastic and almost all the lateral buds of the treated plants were released from apical dominance. Some reduction in root length of treated plants was also observed. A conspicuous anatomical change was the increased breadth of stem meristematic cells. The cell number per unit area (208·32µ) in root and stem meristematic zones declined significantly. The increase in the levels of three species of cytokinins viz. zeatin, zeatin riboside and zeatin ribotide was significant while an unknown species maintained its level in treated and control plants. Another natural cytokinin, 2 iP could not be detected.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ali A A and Fletcher R A 1970 Xylem differentiation in inhibited cotyledonary buds of soybean;Can. J. Bot. 48 1139–1141
Burg S P and Burg E A 1966 The intraction between auxin and ethylene and its role in plant growth;Proc. Natl. Acad. Sci. 55 262–269
Dekhuijzen H M 1976 Enodgenous cytokinins in healthy and diseased plants inEncyclopedia of plant physiology new series eds R Heitfuss and P H William (Berlin: Heidelberg and New York: Springer-Verlag)4 526–559
Gregory F G and Veale J A 1957 A reassessment of the problem of apical dominance;Symp. Soc. Exp. Biol. 11 1–20
Guern J and Usciati M 1972 The present status of the problem of apical dominance inHormona regulation in plant growth and development, eds H Kaldewey and Y Vardar (Weinheim: Verlag Chemie) 383–400
Humphries E C and Pethiyagoda U 1969 Effect of morphactin on growth of potatoes;Dtsch. Bot. Ges. Neue Folge, Nr.3 139–147
Johansen D A 1940 inPlant microtechnique (New York: McGraw Hill) 27–154
Khan A A 1966 Morphactin destroy plant responses to gravity and light;Farm Res. 32 2–3
Kung-Woo, Lee Kessler B and Thimann K V 1974 The effect of hadacidin on bud development and its implication for apical dominance;Physiol. Plant 31 11–14
Osborne D J and McCalla D R 1961 Rapid bioassay for kinetin and kinins using sensecing leaf tissue;Plant Physiol. 36 219–221
McIntyre G I 1968 Nutritional control of the correlative inhibition between lateral shoots in the flax seedling;Can. J. Bot. 46 147–155
Phillips I D J 1969 Apical dominance; in thePhysiology of Plant Growth and Development ed. M B Wilkins (London: McGraw Hill) 163–202
Phillips I D J 1975 Apical dominance;Ann. Rev. Plant Physiol. 26 341–361
Ringe F and von Denffer D 1967 Zur Kenntnis der Wirksamkeit von 2-Chlor-9-fluorenol-9-carbonsaure beibegonia semper florenes gracilis und allium cepa;Wiss. Z. Univ. Rostock, Math Naturwiss. Reihe XVI Heft 4/5, 693–697
Sachs T and Thimann K V 1967 The role of auxins and cytokinins in the release of apical dominance;Am. J. Bot. 54 134–144
Schneider G 1964 Eine neue Grupee von synthetischen Pflanzenwachstum-regulateron;Naturwissenschaften 51 416–417
Schneider G 1970 Morphactins, physiology and preformance;Ann. Rev. Plant Physiol. 21 499–536
Tognoni F and Alpi A M1958 Morphactin, auxin transport and apical dominance inPisum sativum;Dtsch. Bot. Ges. Neue Folge Nr.3 63–60
Tognoni F, Hertogh de A A and Wittwer S H 1967 The independent action of morphactin and gibberellic acid on higher plants;Plant Cell Physiol. 8 231–239
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Dua, I.S., Jindal, K.K., Srivastava, L.J. et al. Correlation of endogenous cytokinins with apical dominance in response to morphactin in soybean (Glycine max L.). Proc. Indian Acad. Sci. 87, 319–324 (1978). https://doi.org/10.1007/BF03048163
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF03048163