Fertilization: Activation of Development
How does the egg respond to fertilization?
Because it has medical, sociological, agricultural and economic implications, fertilization is one of the most fascinating and intensely-studied aspects of development. You should study carefully the textbook and the links listed below to understand fertilization. Be aware of distinct mechanisms that are used by different organisms.
The activation of development is a consequence of a sequence of events triggered by the sperm at the egg surface. The events and mechanism of egg activation in the frog egg are reviewed in the next series of links. Advance through these links until you come to "Frogs in Space".
Now, let's examine two additional aspects of this topic:
"Decondensation of sperm chromatin" from Zygote
Link to Related Material
Digonnet, C., Aldon, D., Leduc, N., Dumas, C. and Rougier, M. 1997. First evidence of a calcium transient in flowering plants at fertilization. Development 124: 2867-2874.
Gallicano, G.I., McGaughey, R.W. and Capco, D.G. 1997. Activation of protein kinase C after fertilization is required for remodeling the mouse egg into the zygote. Mol. Reprod. Dev. 46: 587-601.
Meizel, S., Turner, K.O. and Nuccitelli, R. 1997. Progesterone triggers a wave of increased free calcium during the human sperm acrosome reaction. Develop. Biol. 182: 67-75.
Sette, C., Bevilacqua, A., Bianchini, A., Mangia, F., Geremia, R. amd Rossi, P. 1997. Parthenogenetic activation of mouse eggs by microinjection of a truncated c-kit tyrosine kinase present in spermatozoa. Development 124: 2267-2274.
Stith, B.J., Woronoff, K., Espinoza, R. and Smart, T. 1997. sn-1,2-diacylglycerol and choline increase after fertilization in Xenopus laevis. Mol. Biol. Cell 8: 755-765.
Swann, K. and A.A. Lai. 1997. A novel signalling mechanism for generating Ca2+ oscillations at fertilization in mammals. BioEssays 19: 371-378.
Browder, L.W., Erickson, C.A. and Jeffery, W.R. 1991. Developmental Biology. Third edition. Saunders College Pub. Philadelphia.
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Leon Browder & Laurie Iten (Ed.) Dynamic Development
Last revised Monday, August 4, 1998