marcescence

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Related to marcescent: redolent, flibbertigibbet
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c Apical stem showing elongated internode (arrow), d Treelet with marcescent leaves on the stem surface (arrow), e Detail showing very conspicuous (and dense) indumentum (IN) and glandular trichomes (GT) on the stem surface, f Stem with a grooved surface and little conspicuous indumentum (IN), g Stem region at the beginning of the secondary thickening, demonstrating the fascicular (FC) and the interfascicular (IC) cambium, h External portion of the stem showing protruding stomata (ST) and glandular trichomes (GT).
marianica belongs to the marcescent woodlands of Caldeirao, Monchique, Espinhago de Cao, Brejeira, Carqueja, Sao Luis, Cercal and Grandola mountain ranges (Monchiquense district).
As shown, the marcescent oak woodlands in Southern Portugal are intimately connected with mountainous areas, or specific edaphic typologies which understanding has led to several advances, including taxonomic aspects of this theme.
xneomairei) referring to hybridisation in marcescent oaks.
Vila-Vicosa, C.--2012--Os carvalhais marcescentes do Centro e Sul de Portugal--Estudo e Conservacao.
The most noticeable difference in fiber was higher levels of lignin in the marcescent leaves of beech and hornbeam compared with stems.
The feeding trial I conducted clearly demonstrated that ungulates avoided branches of beech and hornbeam with marcescent leaves, but not branches of common oak (Fig.
Marcescent leaves of beech and hornbeam likely reduced overall digestibility (Table 1) of available forage for ungulate herbivores because of their high lignin and low protein content (Van Soest 1994).
When marcescent leaves constitute most of the diet, ungulates spend more time processing food, especially increased rumination time because of lower food quality (Robbins 1993).
As a consequence, they would not require large amounts of low-quality browse, which may explain why common oak with marcescent leaves was not avoided.
In addition, Salix pulchra in arctic environments of Alaska and eastern Siberia has marcescent leaves (Hulten 1968).
In conclusion, I propose that marcescent leaves should be viewed as a defense mechanism against browsing by large herbivores.