The Mechanism of Calcium Action on Flower Induction in Pharbitis nil

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dc.contributor.author Tretyn, Andrzej
dc.contributor.author Czaplewska, Joanna
dc.contributor.author Cymerski, Mariusz
dc.contributor.author Kopcewicz, Jan
dc.contributor.author Kendrick, Richard E.
dc.date.accessioned 2017-04-27T11:08:15Z
dc.date.available 2017-04-27T11:08:15Z
dc.date.issued 1994-03-22
dc.identifier.citation Journal of Plant Physiology vol. 144 (4-5), 1994, pp. 562-568
dc.identifier.issn 0176-1617
dc.identifier.other https://doi.org/10.1016/S0176-1617(11)82138-3
dc.identifier.uri http://repozytorium.umk.pl/handle/item/4319
dc.description.abstract Calcium ions, calcium ionophores A23187 and ionomycin, as well as caffeine, stimulated the flowering of Pharbitis nil when applied just before and 2 h after starting a subinductive, 14-h long dark period. Effectiveness of all the mentioned compounds decreased over successive hours and when used from 6 h after the onset of the dark period they had no effect or inhibited flowering. Intracellular calcium modulators, ryanodine and thapsigargicin, which are active in animal cells had no effect on flowering. These results suggest that an increase in free Ca2 + before and during the first 2 h of the dark period increases the flowering responses, whereas after the 6th hour it decreases it. We postulate that the targets for calcium action are stomata, which are open before the dark period and remain closed during the first 4 - 5 h of the dark period. The significance of stomata in flower induction was confirmed in experiments with abscisic acid (ABA), a plant hormone which regulates stomatal movements. Treating the cotyledons of plants with ABA at the 8th and 10th hour of the dark period, resulted in plants with about 50 % less flower buds than the control, however, this phytohormone had no effect on flowering when used before the subinductive dark period.
dc.description.sponsorship This research was supported by grant No 663799203 from the Committee for Scientific Investigations (KBN), Poland and by Frontier Research Program (RIKEN), Japan. The authors thank Prof. Isamu Yamaguchi and Dr. Tsutomu Arie (Microbial Toxicology Laboratory, RIKEN, Wako, Japan) for making their SEM facilities available and Miss Anna Biegalska (Department of Plant Physiology and Photomorphogenesis, N. Copernicus University, T orun, Poland) for her technical assistance.
dc.language.iso eng
dc.publisher Gustav Fischer Verlag, Stuttgart
dc.rights Attribution-NonCommercial-NoDerivs 3.0 Poland
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/pl/
dc.subject Calcium
dc.subject calcium ionophores
dc.subject caffeine
dc.subject flowering
dc.subject Pharbitis nil
dc.subject stomata
dc.title The Mechanism of Calcium Action on Flower Induction in Pharbitis nil
dc.type info:eu-repo/semantics/article

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