SciELO - Scientific Electronic Library Online

vol.33 número2Desmidioflórula de um Lago da Planície de Inundação do Rio Acre, Estado do Amazonas, BrasilContribuição adicional à taxonomia das espécies brasileiras deAdenophaedra e Tetrorchidium (Euphorbiaceae) índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados


Acta Amazonica

versão impressa ISSN 0044-5967


SARAIVA, Rita de Cássia Guedes et al. Leaf and stem anatomy of Picrolemma sprucei Hook (Simaroubaceae). Acta Amaz. [online]. 2003, vol.33, n.2, pp.213-220. ISSN 0044-5967.

Anatomical studies of the leaves and stems of Picrolemma sprucei revealed that the epidermes of the leaves are glabrous, with undulating cell walls and anomocytic stomata. The mesophyll is dorsiventral with a layer of cells in palisade and a spongy parenchyma. The vascular bundles are bicollateral and have a dark tannin containing idioblast. The stem possesses a developed cortical parenchyma with schlerenchymatous thick walled cells. These are either isolated or gathered in small groups. Internally the vascular region exhibits xylematic vessels some isolated and some in groups submerged in fibrous tissue. The stem possesses a paratracheal, vasicentric parenchyma with central pith. Histochemical tests (sudan III and ferric chloride) made on the central section of the midrib and on the petiole showed the presence, respectively, of tannin or oleoresin in some cells.

Palavras-chave : Picrolemma pseudocoffea Ducke; caferana; Simaroubaceae; anatomy; stem; leaf.

        · resumo em Português     · texto em Português     · Português ( pdf )