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Science 4 January 1980:
Vol. 207. no. 4426, pp. 77 - 78
DOI: 10.1126/science.207.4426.77
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Articles

Polarization of Fucoid Eggs by a Calcium Ionophore Gradient

KENNETH R. ROBINSON 1 and ROGER CONE 1

1 Division of Molecular and Cellular Biology, National Jewish Hospital, and Research Center, Denver, Colorado

When the eggs of the brown alga Pelvetia were grown in a gradient of the calcium ionophore A23187, they tended to form their rhizoidal outgrowths on the sides that were exposed to the higher concentration of ionophore. This result supports the hypothesis that the formation of an intracellular calcium gradient is an essential step in the polarization of these eggs; the rhizoid forms at the pole that has the higher concentration of calcium.

Submitted on June 11, 1979
Revised on August 13, 1979


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