tube nucleus


Also found in: Medical.

tube nucleus

[′tüb ′nü·klē·əs]
(botany)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A pollen tube begins to grow from a pore in the pollen and a tube nucleus and two sperm nuclei travel along the tube as it grows until it reaches the micropyle, the opening into the ovule cavity.