Fasciation

Wyethia helianthoides or Mule's Ear Wildflower (on right) showing fasciation

Linaria x purpurea showing fasciation

Fasciation (or cresting) is a condition of plant growth in which the apical meristem, normally concentrated around a single point, producing approximately cylindrical tissue, becomes elongated perpendicularly to the direction of growth, producing flattened, ribbon-like, crested, or elaborately contorted tissue. The phenomenon may occur in the stem, root, fruit, or flower head.

Fasciation can be caused by a mutation in the meristematic cells, bacterial infection, mite or insect attack, or chemical or mechanical damage. Some plants may inherit the trait.

Fasciation is rare overall, but has been observed in at least a hundred different plant species, including members of Aloe, Celosia, Delphinium, Digitalis, Euphorbia, Forsythia, Primula, Acer, Prunus, Cannabis and many genera of Cactaceae (cactus) and Salix. Cresting results in undulating folds instead of the typical "arms" found on mature Saguaro cactus.^[1] Some varieties of Celosia are raised especially for their dependably fasciated flower heads, for which they are called "cockscomb".

References

1. ^ "Campus Arboretum". University of Arizona. 2008-08-20. http://arboretum.arizona.edu/heritage_trees.html. Retrieved 2010-01-14. 

External links

Media related to Crested plants at Wikimedia Commons

This botany article is a stub. You can help Wikipedia by expanding it.v · Categories: Plant morphology Botany stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно решить контрольную? Cheetham Hill Sateen Look at other dictionaries: fasciation — [ fasjasjɔ̃ ] n. f. • 1829; du lat. fascia ♦ Bot. Disposition particulière de certaines structures végétales (branches, rameaux, pédoncules) qui s aplatissent au lieu de conserver leur forme cylindrique. Les fasciations des forsythias. ●… …   Encyclopédie Universelle Fasciation — Fas ci*a tion, n. The act or manner of binding up; bandage; also, the condition of being fasciated. [1913 Webster] …   The Collaborative International Dictionary of English fasciation — [fash΄ē ā′shən] n. [Fr] 1. the condition of being fasciate 2. a binding up 3. Bot. an abnormal broadening, flattening, and clumping of plant stems, as in broccoli …   English World dictionary Fasciation — Euphorbia cristée Euphorbia fasciée …   Wikipédia en Français fasciation — ˌ ̷ ̷ ̷ ̷ˈāshən noun ( s) Etymology: probably from (assumed) New Latin fasciation , fasciatio, from (assumed) New Latin fasciatus + Latin ion , io ion : malformation (as in stems of plants) resulting from more or less disorganized tissue growth… …   Useful english dictionary fasciation — noun Date: 1677 a malformation of plant stems commonly manifested as enlargement and flattening as if several stems were fused …   New Collegiate Dictionary fasciation — /fash ee ay sheuhn/, n. 1. the act of binding up or bandaging. 2. the process of becoming fasciate. 3. the resulting state. 4. an abnormality in a plant, in which a stem enlarges into a flat, ribbonlike shape resembling several stems fused… …   Universalium fasciation — noun /fæsɪˈeɪʃən/ a) The binding up of a limb etc. with bandages. b) The process or state of being fasciated …   Wiktionary fasciation — (fa ssi a sion) s. f. Terme de botanique. Vice de conformation des branches d un arbre, des pédoncules et pétioles d une plante, qui s aplatissent et s étendent en forme de bande au lieu de conserver la forme cylindrique. ÉTYMOLOGIE    Lat.… …   Dictionnaire de la Langue Française d'Émile Littré fasciation — n. bandaging, ligation, binding …   English contemporary dictionary 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”