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Related to Chalazogamy: porogamy


A process of fertilization in which the pollen tube passes through the chalaza to reach the embryo sac.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



growth of the pollen tube into the ovule not through the micropyle but through the tissue of the chalaza (the basal part of the ovule). The pollen tube usually grows inside the nucellus and then penetrates the embryo sac in the micropyle portion of the ovule, near the egg cell. Chalazogamy was first described in the Australian pine (Casuarina) in 1891 by the Dutch scientist M. Treub and in the birch, filbert, and alder in 1895 and 1899 by the Russian scientist S. G. Navashin. Subsequently, a number of other scientists described the phenomenon in other plants.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.