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Science 3 September 1982:
Vol. 217. no. 4563, pp. 943 - 945
DOI: 10.1126/science.217.4563.943
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Articles

Calcium Ionophore A23187 Stimulates Cytokinin-Like Mitosis in Funaria

MARY JANE SAUNDERS 1 and PETER K. HEPLER 1

1 Botany Department, University of Massachusetts, Amherst 01003

The plant hormone cytokinin stimulates asymmetrical division in target cells of the protonema of the moss Funaria hygrometrica, leading to bud formation. The initial division can be induced in the absence of cytokinin by the calcium ionophore A23187 in medium containing calcium. These findings suggest that increases in the concentration of intracellular calcium are essential to bud initiation. Therefore mitotic regulation by cytokinin may be due, at least in part, to the modulation of intracellular calcium ion concentration.

Submitted on April 2, 1982
Revised on June 21, 1982


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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P. K. Hepler (2005)
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1,4-Dihydropyridine Binding Sites in Moss Plasma Membranes.
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J. Biol. Chem. 270, 23461-23467
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Science. ISSN 0036-8075 (print), 1095-9203 (online)