Also found in: Dictionary.


Passage of the pollen tube through the micropyle of an ovule in a seed plant.
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 It might be outdated or ideologically biased.



the usual route by which a pollen tube enters an ovule—via the micropyle—in the fertilization of angiospermous and gymnospermous plants. When the pollen tube penetrates the ovule by a different route, the process is called aporogamy (for example, penetration of the chalaza is known as chalazogamy).

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