Abstract
Flowering stems are formed under long-day conditions on root explants of chicory (Cichorium intybus L.) cultured in vitro while under short days, only vegetative growth is observed. Under short-day conditions (12 h), stem elongation is induced by treating newly formed shoot apices with GA3 (1 μl, 10−3M). No flower buds were formed on the GA3-induced stems. Long days seem to be indispensable for the induction of flower buds on the elongated stem.
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Badila P, Lawnac M and Paulet P (1985) The characteristics of light in floral induction in vitro of Cichorium intybus. The possible role of phytochrome. Physiol Plant 65: 305–309
Demeulemeester MAC, Voet A, Van deMierop A and DeProft MP (1994) Stem elongation and floral initiation on in vitro chicory root explants: Influence of photoperiod. Plant Growth Regul 16: 233–238
Evans LT, King RW, Chu A, Mander LN and Pharis RP (1990) Gibberellin structure and florigenic activity in Lolium temulentum, a long-day plant. Planta 182: 97–106
Margara J (1972) Effets de régulateurs de croissance sur l'initiation florale des bourgeons de Cichorium intybus L néoformés en culture in vitro. Actes du 97e Congrès National des Sociétés Savantes. Tome IV: 259–275
Margara J (1977) Effets de régulateurs de croissance associés à différents cycles photopériodiques sur l'induction florale in vitro de bourgeons néoformés de Cichorium intybus L. C R Acad Sci Paris, t. 284, série D: 1991–1994
Margara J and Touraud G (1968) Recherches expérimentales sur la néoformation de bourgeons inflorescentiels ou végétatifs in vitro à partir d'explantats d'Endive (Cichorium intybus L): l'induction photopériodique. Ann Physiol Vég 10(1): 41–46
Margara J, Rancillac M and Beck D (1965) Recherches expérimentales sur la néoformation de bourgeons inflorescentiels ou végétatifs in vitro à partir d'explantats d'endive (Cichorium intybus L). I. Influence de la polarité. Ann Physiol Vég 7(3): 157–170
Murakami Y (1968) A new rice seedling test for gibberellins, ‘microdrop method’, and its use for testing extracts of rice and morning glory. Bot Mag (Tokyo) 81: 33–43
Paulet P and Nitsch JP (1964) Néoformation de fleurs in vitro sur des cultures de tissues de racines de Cichorium intybus L. C R Acad Sci Paris 258: 5952–5955
Talon M, Tadeo F and Zeevaart JAD (1991) Cellular changes induced by exogenous and endogenous gibberellins in shoot tips of the long-day plant Silene armeria. Planta 185: 487–493
Zeevaart JAD (1983) Gibberellins and flowering. In: ACrozier, ed. The Biochemistry and Physiology of Gibberellins, vol. 2, 333–374. New York: Praeger Scientific
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Demeulemeester, M.A.C., Voet, A. & De Proft, M.P. Induction of stem elongation on in vitro chicory root explants under unfavourable photoperiodic conditions by gibberellin A3 . Plant Growth Regul 16, 239–241 (1995). https://doi.org/10.1007/BF00024779
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DOI: https://doi.org/10.1007/BF00024779