Morfoanatomia dos órgãos vegetativos de Piper hispidum Sw. (Piperaceae)

Abstract

RESUMO:O presente trabalho teve por objetivo o estudo morfoanatômico dos órgãos vegetativos de Piper hispidum, visando a estabelecer características marcantes para a sua identifi cação e auxiliar estudos taxonômicos e farmacobotânicos. O material vegetal fresco e fi xado foi estudado segundo as técnicas usuais de corte e coloração, incluindo análise em MEV. Piper hispidum é um arbusto com caule cilíndrico, nodoso, verde claro, com folhas alternas, ovadas, de cor verde-escura na face adaxial e verde claro na abaxial. Dentre as características anatômicas importantes para sua identifi cação destacam-se: parênquima cortical da raiz apresentando grupos de esclereídes. Córtex caulinar com faixas descontínuas de colênquima do tipo angular e tecido vascular organizado em dois círculos descontínuos de feixes colaterais. A folha é dorsiventral, hipoestomática, com estômatos tetracíticos. Hipoderme adaxial descontínua e abaxial frouxa com número variável de camadas; tricomas tectores e glandulares ocorrem nas duas faces. Epiderme uniestratifi cada e idioblastos oleíferos ocorrem em todos os órgãos. Unitermos:Piper hispidum, Piperaceae, morfo-anatomia, farmacobotânica. ABSTRACT: "Morphology and anatomy of the vegetative organs of Piper hispidum Sw.(Piperaceae)". The morphology and anatomy of the vegetative organs of Piper hispidum are described, detaching remarkable strutural aspects and contributing to taxonomical and pharmacobotanical studies. The material was studied according to the usual techniques, including SEM (Scaning Eletron Microscopy). Piper hispidum is a shrub with cylindrical and green stem, which has alternate leaves. The main anatomical characteristics that can be used in its identifi cation are: root with sclereids on cortical parenchyma, stem cortex with discontinuous strands of angular collenchyma, and vascular tissue constituted by two discontinous circles of collateral vascular bundles. The leaf is dorsiventral and hypostomatic with tetracytic stomata. The hypodermis is discontinuous in adaxial face, loose in abaxial one and presents a variable number of layers. Uniseriate epidermis and oil idioblasts occur in all organs.

Microscopic diagnosis of the leaf and stem of Piper solmsianum C.DC

“…The vascular system was represented by five collateral vascular bundles in open arc and the middle was very large (Figure d). Analogous pattern has been found in several species of Piper (Albiero et al, ; Duarte & Siebenrock, ; Pessini et al, ; Souza, Moscheta, & Oliveira, ). However, P. glabratum (Gogosz et al, ) and P. amalago (Santos et al, ) presented only one collateral vascular bundle in the center in the ground parenchyma.…”

“…The vascular system was represented by five collateral vascular bundles in open arc and the middle was very large (Figure 2d). Analogous pattern has been found in several species of Piper (Albiero et al, 2005(Albiero et al, , 2006Duarte & Siebenrock, 2010;Pessini et al, 2003;Souza, Moscheta, & Oliveira, 2004).…”

“…However, other types can be found such as staurocytic (Souza et al, 2009), cyclocytic (Albiero, Paoli, Souza, & Mourão, 2005), as well as anisocytic, anomocytic, polycytic, paracytic, and amphicyclic (Raman, Galal, & Khan, 2012). Hypostomatic leaves are also common in Piper (Albiero, Paoli, Souza, & Mourão, 2006, Gogosz et al, 2012Santos et al, 2015), yet amphistomatic leaves can also be found (Nascimento & Vilhena-Potiguara, 1999). Owing to the variety of stomata that have been found in Piperaceae, this characteristic does not help in the delimitation of species.…”

“…A hypodermis layer was observed on both surfaces (Figure 2a,b). Multiple epidermis have been described for species of Piper but variations can be found in a number of the layers and they can appear only in one surface (Albiero et al, 2006;Gogosz et al, 2012;Raman et al, 2014;Santos et al, 2015;Souza et al, 2009;Vianna & Akisue, 1997).…”

Reporte de dos plantas hospederas de Agrosoma pulchella (Guérin-Méneville, 1829) y Cladonota apicalis (Stal, 1869) en México

“…2B) y agregación junto con los antecedentes de literatura evidenciaron que es su planta hospedera. P. hispidum se distribuye desde México hasta Argentina y las Antillas (Albiero et al, 2006;Plazas et al, 2008). Distribución.…”