Abstract

CARDINALLI, Francisco J.; THEVENON, Mario A.  and  MARTINEZ TOSTO, Ana C.. Morphoanatomical characterization of Cuphea glutinosa (Lythraceae) seedlings primary root structure. Bol. Soc. Argent. Bot. [online]. 2007, vol.42, n.3-4, pp.237-243. ISSN 1851-2372.

Morphoanatomical characteristics and growth patterns of root systems are genetically controlled. Cuphea glutinosa is an important species in popular medicine as a treatment for high blood pressure, as a diuretic and for industrial uses. Actually, the arrangement and relation among the tissues that make up its primary root is unknown. Therefore the objective of the present work was to characterize in axial and radial form the primary structure of this species including the limits of each root area, its characteristics and tissue relations that are present in each zone. The root tip showed a prominent root cap. The meristematic zone starts immediately above the root cap and extends up to 231 µm. C. glutinosa showed minimum variations in the diameter between elongation and maturation zones and enormous differences in tissue composition between both zones considered which indicated that the radical morphogenesis prioritizes vascular tissue formation.

Keywords : Elongation zone; Maturation zone; Meristematic zone; Mucigel; Root hairs.

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