Abstract
Growth correlations in the shoot apical meristem during transition to flowering were studied in a quantitative long day plant,Brassica campestris L. cv. Ceres, requiring only one long day for floral initiation. During photo-inductive exposure of the plants, an overall increase in cell number could be observed at the shoot apex concomitant with promotion of leaf initiation. Release from apical dominance and decline in relative growth rate of leaf primordia are reported as early effects of photo-induction. With the onset of floral differentiation, production of new leaf primordia had stopped altogether. Maximum increase in RNA concentration could be noticed in axillary meristems following photoperiodic treatment, whereas in vegetative plants the highest RNA concentration was found in leaf primordia. The significance of these changes occurring during transition to flowering is discussed.
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References
Arzee, T., Zilberstein, A., Gressel, J.: Immediate intraplumular distribution of macromolecular synthesis following floral induction inPharbitis. -Plant Cell Physiol.16: 505 to 511, 1975.
Bernier, G.: The sequences of floral evocation. -In: La Physiologie de la Floraison. Coll. int. CNRS, N∘ 285. Pp. 129–168. Édit. CNRS, Paris 1979.
Bernier, G., Kinet, J. M., Bodson, M., Rouma, Y., Jacqmard, A.: Experimental studies on the mitotic activity of the shoot apical meristem and its relation to floral evocation and morphogenesis inSinapia alba. -Bot. Gaz.135: 345–352, 1974.
Bronchart, R., Bernier, G., Kinet, J. M., Havelange, A.: RNA synthesis in the cells of apical meristem ofSinapia alba during transition from vegetative to the reproductive condition. -Planta91: 255–269, 1970.
Evans, L. T., Knox, R. B., Rijven, A. H. G. C.: The nature and localization of early events in the shoot apex ofLolium temulentum during floral induction. -In:Bernier, G. (ed.): Cellular and Molecular Aspects of Floral Induction. Pp. 192–206, Longman, London 1970.
Francis, D., Lyndon, R. F.: The cell cycle in the shoot apex ofSilene during the first day of floral induction. -Protoplasma96: 81–88, 1978.
Friend, D. J. C., Helson, V. A.:Brassica campeatria L.: Floral induction by one long day. -Science153: 1115–1116, 1966.
Heslop-Harrison, J., Heslop-Harrison, Y.: The state of the apex and the response to induction inCannabia sativa. -In.:Bernier, G. (ed.): Cellular and Molecular Aspects of Floral Induction. Pp. 3–25. Longman, London 1970.
Krekule, J., Seidlová, F.:Brassica campeatria as a model for studying the effects of exogenous growth substances on flowering in long-day plants. - Biol. Plant.19: 462–468, 1977.
Lyndon, R. F.: Interacting processes in vegetative development and in the transition to flowering at the shoot apex. -Symp. Soc. exp. Biol.31: 221–250, 1977.
Miller, D., Lyndon, R. F.: Changes in RNA levels in the shoot apex ofSilene during the transition to flowering. -Planta136: 167–172, 1977.
Orr, A. R.: Inflorescence development inBraaaica campeatria L. -Amer. J. Bot.64: 466 to 470, 1978.
Seidlová, F.: Growth correlations and RNA synthesis in different parts of the shoot apical meristem ofChenopodium rubrum L. induced to flowering. -Biol. Plant.18: 19–25, 1976.
Seidlová, F., Khatoon, S.: Effects of indol-3yl acetic acid on floral induction and apical differentiation inChenopodium rubrum L. - Ann. Bot.40: 37–42, 1976.
Seidlová, F., Krekule, J.: Effects of kinetin of growth of the apical meristem and floral differentiation inChenopodium rubrum L. - Ann. Bot.41: 755–763, 1977.
Seidlová, F., Opatrná, J.: Change of growth correlations in the shoot meristem as the cause of age dependence of flowering inChenopodium rubrum. -Z. Pflanzenphysiol.89: 377 to 392, 1978.
Thomas, R. G.: Correlations between growth and flowering inChenopodium amaranticolor. I. Initiation of leaf and bud primordia. -Ann. Bot.25: 138–151, 1961.
Williams, R. F.: The Shoot Apex and Leaf Growth: A Study in Quantitative Biology. - Cambridge University Press, Cambridge 1975.
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Kohli, R.K., Seidlová, F. Growth correlations in shoot apices ofBrassica campestris L. during transition to flowering. Biol Plant 23, 41–45 (1981). https://doi.org/10.1007/BF02909209
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DOI: https://doi.org/10.1007/BF02909209