Abstract

FRANCISCO-FRANCISCO, Nazario et al. Morphology and leaf anatomy of Dasylirion cedrosanum at different stages of development. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.7, pp.1679-1687. ISSN 2007-0934.

In this paper was analyzed the foliar morpho-anatomy of Sotol Dasylirion cedrosanum Trel., perennial species northern Mexico and southern United States. This species is of great economic and social importance in arid and semiarid areas of Mexico. The objective was to observe the differences in morphological and anatomical leaf development at different ages. For morphological study plant samples 6, 30, 60 and 84 months of age they were taken. The middle portions of the longitudinal axis of leaves were collected at ages previously established and fixed in FAA. The samples were processed with conventional methods to obtain permanent slides. The leaf epidermis consists unistrate cells isodiametric form, the stomata are paracytic type, stomatal density, stomatal index shows values between 14.0-23.3% and stomatal cells density ranging from 46.8-65, stomata mm-2, the adaxial and abaxial surfaces do not exhibit dominance over one another. The palisade parenchyma up to 62% increases with age; the mesophyll is isolateral with brachisclereids extending from vascular bands. The vascular bundles are bands of three orders on which there prismatic crystals.

Keywords : leaf; paracitic; stomata; stomatal density; stomatal index.