SOARES, M. M. P.; http://lattes.cnpq.br/5568583912280714; SOARES, Marcelo Maciel Pereira.
Abstract:
Ruellia paniculata L. is a native of Brazil, popularly known as "mellow-rock" found in the Northeast, Midwest and Southeast, in open areas, favored by soil moisture and the cracks of granitic rocks, at altitudes 900-1.100m vary. This study aimed to carry out an anatomical characterization of leaves, stem and roots of this species in order to recognize characters useful to provide subsidies for identifying and delimiting species. Anatomical analyzes were performed with leaves, stem fragments and fresh or hydrated secondary roots subsequently subjected to plant anatomy techniques and histochemical tests for disclosure of different compounds. R. paniculata it epidermis, in front view, with sinuous anticlinal cell walls and litocistos containing calcium carbonate cystoliths, on both sides, diacytic stomata with hypostomatic distribution. Has dorsiventral mesophyll, midrib with three to five colateral bundles, plano- convex petiole the biconvex, with three colateral bundles and angular chollenchyma. The stem has a square shape with central cylinder structure sifonostelic ectophloic discontinuous. The root has protostelic structure and bundles sparse sclerenchymatous fibers are present in the cortical region. The applied histochemical tests showed the presence of starch, cutin, calcium carbonate crystals, lignin and lipid droplets. The anatomy of the leaf epidermis, presence of inclusions and vascularization, together with the organization vascular stem and root were the principal distinctive characters for recognizing the species.
