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Title of Journal: Protoplasma

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Abbravation: Protoplasma

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Springer Vienna

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DOI

10.1002/jps.2600840501

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ISSN

1615-6102

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Fertilization and development without the fertiliz

Authors: A R Moore
Publish Date: 1930/12/01
Volume: 9, Issue: 1, Pages: 18-24
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Abstract

The ions of Mg Ca Sr and Ba if added to the solution of nonelectrolyte in sufficient quantity inhibit the loss of membrane forming power in the eggs and upon fertilization they form a fertilization membrane and develop normal larvae Since the bivalent ions are effective in approximately equal concentration the protective action is apparently due to a valence effectThe fertilized eggs ofDendraster if kept for a short time in a solution of nonelectrolyte or of M/2 NaCl or of acidulated sea water pH 4 lose their fertilization membranes and develop cell plates The formation of the blastula is impossible if the membrane is lostThe bivalent ions are effective in preventing the solution of the fertilization membrane Ca Sr and Ba are approximately equipotential and are eight times as effective as Mg The process is therefore different from the action of the bivalent ions on the unfertilized egg under paragraph 2

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  2. Accumulation of extracellular proteins bearing unique proline-rich motifs in intercellular spaces of the legume nodule parenchyma
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