Morfoanatomia, histoquímica e perfil fitoquímico de Priva lappulacea (L.) Pers. (Verbenaceae)

Abstract

RESUMO:Este estudo descreve a anatomia e analisa a histoquímica dos órgãos vegetativos de Priva lappulacea (L.) Pers. Secções transversais e paradérmicas, à mão livre, de material fresco e fixado foram utilizadas para as análises anatômicas e histoquímicas, usando microscopia óptica. Os caracteres anatômicos são comuns àqueles descritos para a família, podendo ser utilizados como diagnóstico na sua identificação. Destacam-se, nas folhas, os tricomas, glandular e não-glandular, estômatos anomocíticos, em ambas as faces da epiderme, e mesofilo dorsiventral. As expansões no pecíolo são acrescentadas à diagnose da espécie. Estudo fitoquímico realizado com as partes aéreas mostrou a presença de triterpeno (ácido ursólico) e esteróide (β-sitosterol), iridóides (ipolamida e catalpol), açúcar redutor (glucose), flavonóide (luteolina) e fenilpropanóide (verbascosídeo). Nas raízes foi encontrada apenas glucose e dois iridóides estiveram presentes no caule e folhas. Alcalóides, saponinas, cumarinas, derivados cinâmicos, proantocianidinas condensadas e leucoantocianidinas não foram constatados nas partes analisadas. A descrição anatômica e os testes histoquímicos são inéditos para P. lappulacea. Unitermos:Priva lappulacea, Verbenaceae, morfoanatomia, perfil fitoquímico.ABSTRACT: "Morphoanatomy, histochemistry and phytochemical screening of Priva lappulacea (L.) Pers. (Verbenaceae)". This study describes the anatomy and analyzes the histochemistry of the vegetative organs of Priva lappulacea (L.) Pers. Freehanded transversal and paradermal sections of fresh and fixed material were used for the anatomical and histochemical analyses, using optical microscopy. The anatomical characters are common to those described for the family, being able to be used to diagnosis in its identification. The leaves are highlighted by the presence of glandular and non-glandular trichomes, anomocytic stomata on both faces of the epidermis and dorsiventral mesophyll. The expansions in the petiole are added to the diagnosis of this species. The phytochemical study carried out with aerial organs showed the presence of triterpene (ursolic acid) and steroid (β-sitosterol), iridoids (ipolamide and catalpol), reducing sugar (glucose), flavonoid (luteolin) and fenilpropanoid (verbascosides). In the roots only glucose was found and two iridoids are present in stem and leaves. Alkaloids, saponins, cumarines, cinamic acid derivates, condensed proantocianidines and leucoantocianidines were not checked in the analyzed parts. The anatomical description and the histochemical tests are unpublished for P. lappulacea.

Foliar phenolic compounds of ten wild species of Verbenacea as antioxidants and specific chemomarkers

“…A complex pattern was also found for P. mexicana, formed by one glycoside derivative of scutellarein (12), one luteolin-7-O-glycoside (13), two apigenin-7-O-glycosides (6 and 22), and six phenolic acids (1, 2, 10, 15, 27 and 35). The complex profile found for P. mexicana contrasts with that reported for the aerial parts of other species of Priva, like P. lappulacea, for which Braga et al (2009) only mentioned luteolin.…”

Does Fertigation With Fish Farming Effluent Alter the Morphophysiology and Biochemistry of Lippia Gracilis (Verbenaceae)?

“…The presence of calcium oxalate crystals is not a common characteristic to all members of the Verbenaceae family (Souza et al 2005;Braga et al 2009); however, the presence of these crystals in leaves of other species of the genus Lippia has been documented, being highlighted as a xeromorphic characteristic (Andersen et al 2006). On the other hand, the maintenance of the number of auxiliary vessels (NAV) in the leaves of plants subjected to different concentrations of sh farming e uent denotes that in plants subjected to treatment with 100% of sh farming e uent there was no need to invest in the formation of new vascular bundles to optimize the transport of resources.…”