abscission layer

abscission layer

Useful english dictionary. 2012.

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  • abscission layer — Bot. the layer of specialized, cutinized parenchyma cells that develops in the abscission zone, the disintegration of which causes abscission. Also called separation layer. [1915 20] * * * …   Universalium

  • abscission layer —   Region of tissue designed to separate cleanly, e.g. the leaf bases of most cycad species …   Expanded glossary of Cycad terms

  • Abscission — (from Latin abscindere, from ab ‘off, away’ + scindere ‘to cut’) is the shedding of a body part. It most commonly refers to the process by which a plant intentionally drops one or more of its parts, such as a leaf, fruit, flower or seed, though… …   Wikipedia

  • abscission zone — noun : the zone in a leaf petiole, fruit stalk, or branch often marked by a constriction within which is developed the separation layer, the vascular bundles in the zone usually being reduced in diameter, the sclerenchyma being weak or absent,… …   Useful english dictionary

  • abscission zone — Bot. the zone at the base of a leaf petiole, fruit stalk, or branch in which the abscission layer develops. * * * …   Universalium

  • abscission — [ab sizh′ən] n. [ME abscisioun < L abscissio: see ABSCISSA] 1. a cutting off, as by surgery 2. the normal separation of fruit, leaves, etc. from plants by the development of a thin layer of pithy cells at the base of their stems …   English World dictionary

  • abscission — noun Etymology: Middle English abscisioun, from Anglo French abscission, Latin abscission , abscissio, from abscindere Date: 15th century 1. the act or process of cutting off ; removal 2. the natural separation of flowers …   New Collegiate Dictionary

  • abscission —   Physiological process in which a corky cell layer forms across an axis, cutting off water and nutrient supply to the distal portion and resulting in its loss, as in loss of a leaf, leaf like organ, or section of stem. See also caducous,… …   Expanded glossary of Cycad terms

  • separation layer — noun : a distinct layer within an abscission zone of a plant varying in thickness and composed of cells that are smaller and different in shape from those above and below and contain abundant starch and dense cytoplasm by the disorganization of… …   Useful english dictionary

  • absciss layer — noun see abscission layer * * * absciss layer or abscission layer noun (botany) A layer of parenchymatous cells through which a leaf, branch or bark scale separates off • • • Main Entry: ↑abscind …   Useful english dictionary

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