Bifacial (leaf)
Bifazial referred to Botany a particular leaf category of a plant. This can be named after its origin and the arrangement of the fabric . One speaks of a bifacial leaf when it has an upper and an underside , emerges from both sides of the leaf systems and the tissue is arranged in a certain structure .
term
The term bifacial is derived from the Latin of Bi (two, two) and Facies (outer appearance, the outside, appearance).
Origin and arrangement of the tissues
The top and bottom of a bifacial leaf emerges from the corresponding side of the leaf system.
Dorsiventral
The structure of the leaf tissue can be dorsiventral , but there are often differences in the appearance and anatomy of the upper and lower side of the leaf. Mostly comes
- The underside of the leaf or the spongy parenchyma facing the shoot and
- Upper side of leaf or palisade parenychm facing away from the shoot .
Equifacial
Another form of leaf tissue structure of the bifacial leaf is the equifacial . Mostly is
- the palisade parenchyma arranged on the underside and upper side of the leaf.
- In between there is sponge parenchyma, which is why the appearance of the top and bottom are the same.
See also
Division of the sheet according to anatomical aspects
literature
- Wolfram Braune, Alfred Leman , Hans Taubert : Plant anatomical internship. Volume 1: An introduction to the anatomy of the vegetation organs of the seed plants. 5th, revised edition. Fischer et al., Stuttgart 1987, ISBN 3-437-20391-6 , p. 174.