| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,911,489,606 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Dermatogen |
Also found in: Dictionary/thesaurus | 0.01 sec. |
|
|
dermatogen [dər′mad·ə‚jen]
(botany) The outer layer of primary meristem or the primordial epidermis in embryonic plants. Also known as protoderm. Dermatogen in plants, the dense (without intercellular spaces) outer layer of cells of primary formative tissue (promeristem) in growing root tips. Dermatogen cells usually divide such that the septa formed are perpendicular to the root surface—that is, anticlinal. (Only in the aerial roots of the orchids and arum families and in the thick underground roots of some amaryllis and lilies are they parallel to the surface of the organ, or periclinal, forming a multilayered covering—the so-called velamen.) Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
|
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|