Anatomia do eixo vegetativo aéreo de Sofanum paludosum Moric e S. stramonifolium Jacq (Solanaceae) da restinga de Algodoal - Pa.

Abstract

(Anatomy of Solanum paludosum Moric and Solanum stramonifolium Jacq. the aerial vegetative axis (Solanaceae) of Algodoal-PA sandbank). Someone questions, in the present study, if Solanum paludosum Moric and Solanum stramonifolium Jacq., from Solananceae family, show qualitative structure that allow to identify them. To carry out the study, we realize a comparative analysis of morfo-anatomical structures of the stem and of the leaf of from both tax, using the technics in vegetable anatomy. The leaf anatomical analysis made possible the identification of important differential characters in the separation of the species in study: Solanum paludosum has adaxial epidermis with smooth cuticle, the chamfers are limited to the stomata cells-polices and the abaxial is champfered, anticlines walls from adaxial surface are straight and from abaxial surface are sinuous, absence of tectors unifilamentous trichoms and an average og starry tectors stipitate trichoms amaller than Solanum stramonifolium. The last one shows the two epidermis faces lightly chamfered with sinuous anticlines walls and tectors unifilamentous trichoms. Both have an epicuticular unomamented wax, parallel to an uniserialed epidermis, covered with a thin cuticle, anphihipostomatal with anisocytic and anisocytic, the most common is anisocytic, stipitate starry tectors trichoms, porecto-starry tectors and glandular capitate, a dorsiventral mesophyll, a single vascular bundle in midrib and three in the petiole, of a bicollateral type. Through the anatomical stem study some differences were found among the type of collenchyma between the two species, it is angular in S. paludosum and ringed in S. stramonifolium. However, they showed common characters like a circular and closed vascular cylinder, bicollateral, idioblasts with crystals of calcium oxalate and sclereids. The tax investigated showed conservative and distinctive character, important to guide their diagnosis.