Análise morfoanatômica comparativa da folha de Bauhinia forficata Link e B. variegata Linn. (Leguminosae, Caesalpinioideae)

Abstract

RESUMO -(Análise morfoanatômica comparativa da folha de Bauhinia forficata Link e B. variegata Linn. (Leguminosae, Caesalpinioideae)). Esse trabalho foi desenvolvido com o propósito de subsidiar o controle de qualidade das espécies medicinais Bauhinia forficata Link e B. variegata Linn. Essas foram coletadas em jardins e terrenos baldios de Curitiba, Paraná, Brasil. As amostras do limbo, pecíolo e pulvino foram fixadas em F.A.A. 50 e conservadas em etanol 70%. O seccionamento do material foi feito em micrótomo de rotação (material incluído em historresina) ou a mão livre e as lâminas foram montadas de forma permanente ou semipermanente. Foram realizadas análises em microscopia fotônica e eletrônica de varredura. A folha de B. forficata é alongada, com folíolos unidos em torno da metade do limbo, ápices agudos, superfície adaxial lisa e mucro entre os folíolos. Enquanto que, B. variegata possui folha mais larga que longa, com folíolos unidos na porção terminal do limbo e ápices obtusos. Nos pulvinos de B. variegata ocorrem camadas de colênquima, ausentes em B. forficata. O formato e a bainha de fibras dos pecíolos, em secção transversal, são distintos entre as espécies, assim como a distribuição dos estômatos e tricomas no limbo e a forma do bordo em secção transversal. B. variegata possui maior quantidade de idioblastos com drusas e compostos fenólicos. As características morfológicas e anatômicas de B. forficata e B. variegata contribuem para a identificação e diferenciação das espécies, sendo importantes para o controle de qualidade do material destinado à pesquisa e à indústria farmacêutica. Palavras-chave: Bauhinia, pata-de-vaca, plantas medicinais ABSTRACT -(Comparative morphogical and anatomycal analyses of Bauhinia forficata Link and B. variegata Linn. (Leguminosae, Caesalpinioideae) leaves). This work has been developed with the purpose of helping the quality control of the medicinal speciesBauhinia forficata Link and B. variegata Linn., which were collected in gardens and vacant lots in Curitiba, Paraná, Brazil. The samples of leaf blade, petiole and pulvinus were fixed in FAA 50 and preserved in alcohol 70. The sectioning of the material was made in rotational microtome (with the material included in historesine) or manually and the blades were mounted in permanent or semipermanent way. Analyses in photonic and scanning electronic microscopy were performed. The leaf of B. forficata is elongated, with the leaflets united around the middle of the leaf blade, acute apices, smooth adaxial surface and mucros between the leaflets. The B. variegata, on the other hand, possesses a broader than long leaf, with the leaflets united in the terminal portion of the blade and obtuse apices. In the pulvinus of B. variegata there are collenchyma layers, which are absent in B. forficata. The shape and the petiole fibers sheath, in cross section, are distinct in both species, as well as the distribution of the stomata and trichomes in the leaf blade and the shape of the border in transversal section. B. variegata possess...

Thermodynamic properties and drying kinetics of Bauhinia forficata Link leaves

“…Among the more than 300 known species from the Bauhinia genus (Lusa & Bona, 2009), the species Bauhinia forficata Link, popularly known in Brazil as 'pata-de-vaca' , is constantly used in popular medicine, standing out in the treatment of diabetes mellitus (Rodrigues et al, 2012).…”

Leaf and Stem Anatomy and Histochemistry of Dalbergia ecastaphyllum

“…This pattern of epicuticular waxes was reported for Bauhinia forficata, another species of Fabaceae, by Lusa and Bona. 29 The adaxial surface showed very rough cuticle, however epicuticular waxes were not observed in this area (Figure 2A). In transverse section, the epidermal cells of the adaxial surface were tabular and somewhat rounded ( Figure 1C D).…”

“…1A), a feature also observed in other species of Dalbergia by Farooqui et al 16 and Khan et al, 17 and in species of some genera of Fabaceae, like Bauhinia L., according to Lusa and Bona. 29 On the other hand, the epidermis on the abaxial surface is predominantly papillose, except on subsidiaries cells of stomata ( Figure. 1B, 2C F). Similar pattern was referred for Dalbergia latifolia Roxb.…”

Ecological interpretations of the leaf anatomy of amphibious species of Aeschynomene L. (Leguminosae - Papilionoideae)

“…The studies made over the last decade have shown that the anatomy of the root, stalk and specially leaves, are consistent for the infra-generic or genus separation (Jesus Junior et al, 2012;Gomes et al, 2009;Lusa and Bona, 2009), especially for Papilionoideae (Teixeira and Gabrielli, 2006;Sartori and Tozzi, 2002;Crow et al, 1997). The anatomy is also applied in the interpretation of the phenotype plasticity in amphibious species located in lagoons and wetlands of Pantanal (Scremin-Dias, 1999;Scremin-Dias et al, 2011).…”