Libriform fiber

Libriform fibers or wood fibers are consolidating serving, dead cells in secondary xylem of angiosperms (angiosperms).

Libriform fibers have thick, heavily lignified cell walls , a very small lumen and are the longest cells in wood. They are pointed at the ends. Their pits are characterized by a characteristic column or tube shape.

Living libriform fibers, which form transverse walls (septa) and fulfill storage functions, are common in some dicotyledons . They thus form a transition to the xylem parenchyma.

Phylogenetically, the libriform fibers are understood as a further development of the tracheids , which still have a conduction and support function. In the bedcovertsamers the libriform fibers fulfill the support function, while the trachea take over the water conduction.

There are transitions from the libriform fibers to the fiber tracheids, which fulfill both supporting and water conduction functions.

supporting documents

• W. Braune, A. Leman, H. Taubert: Plant anatomical practical course I. For an introduction to the anatomy of the vegetation organs of the seed plants . 6th edition, Gustav Fischer, Jena 1991, pp. 84, 134. ISBN 3-334-60352-0
• Katherine Esau : Anatomy of Seed Plants . Wiley, New York 1960, pp. 83ff. (without ISBN)