Meristems - Research Article from Macmillan Science Library: Plant Sciences

This encyclopedia article consists of approximately 4 pages of information about Meristems.
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Apical Meristems

Both root and shoot apical meristems consist of a group of two types of cells: initials and their immediate derivatives. Initials are the true meristematic cells in that they divide almost continuously throughout the growing season. When an initial divides it forms two daughter cells, one a new initial and the other a derivative that soon stops dividing and eventually differentiates into part of the mature tissues of the plant. In many cases the older derivatives elongate, and it is this process that pushes the initials of the shoot apical meristem higher into the air and the initials of the root apical meristem deeper into the soil. All tissues produced by an apical meristem are called primary tissues.

In most plants the root apical meristem is covered by a protective root cap and consists of a group of relatively small, roughly spherical cells, each having a dense...

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This section contains 1,072 words
(approx. 4 pages at 300 words per page)
Buy the Meristems Encyclopedia Article
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Macmillan Science Library: Plant Sciences
Meristems from Macmillan Science Library: Plant Sciences. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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