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Anatomía Foliar de Polylepis sericea Wedd. (Rosaceae) a dos altitudes en los Altos andes venezolanos.

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Author(s): Colmenares-Arteaga, Maribel | Rada, Fermín | Luque Rebeca

Journal: Plantula
ISSN 1316-1547

Volume: 3;
Issue: 3;
Start page: 141;
Date: 2005;
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Keywords: Adaptations | Leaf anatomy | Paramo | Polylepis sericea | Treeline | Water stress.

ABSTRACT
Leaf anatomy of Polylepis sericea individuals was studied at two different altitudes in Mérida, Venezuela. This work was carried out at 4,100 m a. s. l. in Loma Redonda and 3,500 m a. s. l. in Paramo of Mucubají, with the purpose of studying the structure and determining characteristics given by the altitudinal differences and/or water seasonality. Xeromorphic characters and structural differences given by the altitudinal effect such as reduction in leaf area and an increase in chlorenchyma and differences derived from the effect of the dry season such as formation of a thick cuticle and changes in stomatal density were found.

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