Britoet al. 2016 (Article) Ananas, leaf

Morfoanatomía foliar de dos ecotipos de Ananas comosus (L.) Merr. del Amazonas

Author(s):—A. Brito, H. Blanco, M. Escala, E. Vargas & E. de Garcia

Corresponding email:—basilven@gmail.com, smiguel@cantv.net

Publication:—Acta Bot. Venez. 39(2): 158-179. (2016)

Abstract:—Morphoanatomical analysis was conducted in two Amazonian ecotypes of Ananas comosus, Amarilla and Yärä känä. Cuts from medium sections of fully expanded leaves, were fixed in 70% ethyl alcohol for anatomical studies. Morphologically, the leaves of both were differentiated by the light green and dark coloration and the presence or not of stingers in the edges of the leaf, respectively. The structural analysis showed: monostratified epidermis cells with sinuous walls (or very ondulated in Yärä Känä), and silica crystals; adaxial and abaxial mechanical hypodermis; heterogeneous aquifer parenchyma; chlorenchyma of rounded cells, aerenchym in chambers, collateral vascular bundles, and packages of extravascular fibers, in greater numbers in Yärä Känä. The leaves of both ecotypes are amphistomatic, somewhat unusual in the genus Ananas, with greater stomatal density on the underside.

Keywords:—aguijones, cámara aerífera, escamas peltadas, fibras extravasculares, hoja anfiestomática