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The relationship between 1-methyladenine induced surface changes and fertilization in starfish oocytes

1977; Elsevier BV; Volume: 107; Issue: 1 Linguagem: Inglês

10.1016/0014-4827(77)90405-0

1090-2422

Michael P. Rosenberg, Robert Hoesch, H.H. Lee,

Crustacean biology and ecology

Scanning electron micrographs (SEM) of the outer surface of immature starfish oocytes treated with the hormone, 1-methyladenine (1-MA), show structural changes of the vitelline layer on which some materials form a fibrous “cap”-like structure at 4 min post treatment. 1-MA also induces the transformation of the vitelline layer from a coarse to a ruffled surface. This transformation may be involved in the block to polyspermy, since addition of 6 × 108 sperm to a suspension of oocytes 5 min after the addition of 1-MA resulted in a significant reduction of sperm bound to the egg surface.