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Marcescence is the withering and persistence of plant organs that normally are shed, and is a term most commonly applied to plant leaves. The underlying physiological mechanism is that trees transfer water and sap from the roots to the leaves through their vascular cells, but in some trees as autumn begins, the veins carrying the sap slowly close until a layer of cells called the abscission layer completely closes off the vein allowing the tree to rid itself of the leaf. Leaf marcescence is most often seen on juvenile plants and may disappear as the tree matures. It also may not affect the entire tree; sometimes leaves persist only on scattered branches. Marcescence is most obvious in deciduous trees that retain leaves through the winter. Trees that exhibit marcescence are known as "everci

AttributesValues
rdfs:label
  • ذابل متصل (ar)
  • Marzeszenz (de)
  • Marcescente (es)
  • Zimelkor (eu)
  • Marcescenza (it)
  • Marcescence (fr)
  • Marcescence (en)
  • Marcescência (pt)
rdfs:comment
  • Als (Substantiv) Marzeszenz, (Adjektiv) marzeszent (von lateinisch marcescere „verwelken, welk werden“) wird in der Botanik das Verbleiben verwelkter und abgestorbenener Organe wie Blätter oder Blütenkronen an der Pflanze bezeichnet. In der Mykologie wird mit Marzeszenz die Fähigkeit zum vorübergehenden Eintrocknen des Fruchtkörpers beschrieben. (de)
  • La marcescenza (sostantivo, l'aggettivo corrispondente è marcescente) in botanica indica il fenomeno per cui le foglie di alberi e arbusti caducifoglie, dopo avere terminato il periodo vegetativo e attuato il cambiamento di colore, restano in maggior parte attaccate all'albero durante tutta la stagione fredda (autunno e inverno) fino alla successiva primavera, quando nasceranno le nuove foglie. Due alberi che sono soliti essere caratterizzati da questo fenomeno sono la quercia dei Pirenei (Quercus pyrenaica) ed, in misura inferiore, numerose piante di faggio (Fagus sylvatica). (it)
  • الذابل المتصل هو الاحتفاظ بـأعضاء النبات الذابلة التي تتساقط طبيعيًا. وتعتبر ظاهرة شديدة الوضوح في الأشجار متساقطة الأوراق التي تحتفظ بأوراقها في فصل الشتاء. ولدى كثير من الأشجار أوراق ذابلة متصلة مثل البلوط (البلوط (كيركاس)، شجر الزان (شجر الزان (فاجوس)) وشجر الزان الأبيض (كاربيناس). تكمل الأوراق الذابلة المتصلة لـ[شجر السندبان (سندبان المستنقعات)نمو طبقة الانفصال في فصل الربيع. وتبقى قاعدة العنق حية طوال فصل الشتاء. وقد يحتفظ الكثير من الأشجار الأخرى بأوراق ذابلة متصلة في مختلف الفصول حيث إن الصقيع المبكر يتلف الأوراق قبل تطور طبقة الانفصال أو قبل إكمال التطور. ويمكن أيضًا للأمراض والآفات أن تتلف الأوراق قبل ظهور طبقة الانفصال. (ar)
  • Marcescente es un término utilizado en botánica para describir a aquellas hojas de árboles y arbustos caducifolios, que, tras haber finalizado el periodo vegetativo y con el cambio de color del follaje, permanecen en el árbol en su gran mayoría durante toda la estación fría (otoño e invierno) hasta prácticamente la salida de las nuevas hojas en la siguiente primavera. Los árboles que suelen ser característicos por este fenómeno, son los robles​ como el melojo (Quercus pyrenaica), el quejigo (Quercus faginea), numerosos pies de haya (Fagus sylvatica) y los carpes (Carpinus) (es)
  • Zimelkor edo martzeszente izatea landareen ezaugarri bat da, non organo zimelak ez diren erortzen. Gehienetan zuhaitz eta zuhaixka hostoerorkorren hostoei dagokio, non aldi begetatiboa amaitu ondoren eta hostoen kolore-aldaketarekin, gehienak atxikiak gelditzen diren urtaro hotz osoan zehar (udazken eta neguan), hurrengo udaberrian hosto berriak ernatu arte. Fenomeno honen zuhaitz bereizgarrien artean daude Quercus generoko asko (ametza, erkametza, turkiar haritza, kanariar ametza...), pagoa (Fagus sylvatica) eta xarma (Carpinus). * Erkametzak Sierra Madronan (Gaztela-Mantxa) * * * (eu)
  • Marcescence is the withering and persistence of plant organs that normally are shed, and is a term most commonly applied to plant leaves. The underlying physiological mechanism is that trees transfer water and sap from the roots to the leaves through their vascular cells, but in some trees as autumn begins, the veins carrying the sap slowly close until a layer of cells called the abscission layer completely closes off the vein allowing the tree to rid itself of the leaf. Leaf marcescence is most often seen on juvenile plants and may disappear as the tree matures. It also may not affect the entire tree; sometimes leaves persist only on scattered branches. Marcescence is most obvious in deciduous trees that retain leaves through the winter. Trees that exhibit marcescence are known as "everci (en)
  • La marcescence (adjectif : marcescent ; du latin marcescere : se flétrir, se faner) est l'état d'un organe végétal qui, après son flétrissement, demeure longtemps desséché sur la plante et ne s'en détache parfois qu'à la fin de la mauvaise saison. Par extension, cet état se dit aussi d'une plante caractérisée par de tels organes (notamment un arbre qui conserve ses feuilles mortes attachées aux branches durant la saison de repos végétatif) ou d'une formation végétale (exemple : une forêt marcescente). (fr)
  • A marcescência é, em botânica, a retenção de mortos, normalmente folhas, por algumas espécies de carvalhos (tais como o carvalho-português e o carvalho negral), de faias, de carpinos e de palmeiras, que, quando secam, não se soltam do tronco, ficando penduradas na árvore durante toda a estação fria (outono e inverno), cobrindo-a até à chegada da primavera, quando novas folhas ocupam o seu lugar. (pt)
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/City_Botanic_Gardens_Palm_trees_IMG_9301_(3681474106).jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Dead_Leaf_retention_on_Beech_trees.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Espeletia_grandiflora_2.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Hyphaene_dichotoma_3zz.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Livistona_chinensis_Brest.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Marcescence_on_Quercus_(oak).jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Oakmer.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Senecio_kilimanjari.jpg
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