Morpho-anatomy of the leaf and stem of Eugenia pyriformis
Eugenia pyriformis Cambess., known as uvaia, is a species of Myrtaceae native to Brazil. Its leaves are used in folk medicine to treat gout because they possess the property of inhibiting xanthine oxidase, an enzyme involved in the conversion of xanthine into uric acid. The objective of this work was to study the leaf and stem morpho-anatomy of E. pyriformis, in order to contribute to what is known about the Brazilian flora, and this medicinal plant and potential vegetal drug. Samples of mature leaves and young stems were fixed and sectioned by freehand, or embedded in glycol methacrylate and sectioned with a microtome, and then stained. In addition, microchemical tests and scanning electron microscopy were performed. The leaf is simple, symmetric, elliptic-lanceolate, with an acute apex and base, and an entire margin. The epidermis is uniseriate and coated with a moderately thick cuticle. The stomata are anomocytic and inserted at the same level as the adjacent cells. Unicellular non-glandular trichomes are abundant on the abaxial surface. The mesophyll is dorsiventral. In transverse section, the midrib is plano-convex and the petiole is circular, and both of these structures have a single bicollateral vascular bundle. In the stem, the vascular cylinder consists of external phloem, xylem and internal phloem, traversed by narrow rays. Phenolic compounds, druses and prismatic crystals of calcium oxalate are also present in the leaf and stem.
Main Authors: | , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Farmacognosia
2012
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-695X2012000300002 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
oai:scielo:S0102-695X2012000300002 |
---|---|
record_format |
ojs |
spelling |
oai:scielo:S0102-695X20120003000022012-05-09Morpho-anatomy of the leaf and stem of Eugenia pyriformisArmstrong,LoreneDuarte,Márcia do RocioMiguel,Obdulio Gomes Eugenia pyriformis uvaia internal phloem macro-and microscopic identification non-glandular trichome Eugenia pyriformis Cambess., known as uvaia, is a species of Myrtaceae native to Brazil. Its leaves are used in folk medicine to treat gout because they possess the property of inhibiting xanthine oxidase, an enzyme involved in the conversion of xanthine into uric acid. The objective of this work was to study the leaf and stem morpho-anatomy of E. pyriformis, in order to contribute to what is known about the Brazilian flora, and this medicinal plant and potential vegetal drug. Samples of mature leaves and young stems were fixed and sectioned by freehand, or embedded in glycol methacrylate and sectioned with a microtome, and then stained. In addition, microchemical tests and scanning electron microscopy were performed. The leaf is simple, symmetric, elliptic-lanceolate, with an acute apex and base, and an entire margin. The epidermis is uniseriate and coated with a moderately thick cuticle. The stomata are anomocytic and inserted at the same level as the adjacent cells. Unicellular non-glandular trichomes are abundant on the abaxial surface. The mesophyll is dorsiventral. In transverse section, the midrib is plano-convex and the petiole is circular, and both of these structures have a single bicollateral vascular bundle. In the stem, the vascular cylinder consists of external phloem, xylem and internal phloem, traversed by narrow rays. Phenolic compounds, druses and prismatic crystals of calcium oxalate are also present in the leaf and stem.info:eu-repo/semantics/openAccessSociedade Brasileira de FarmacognosiaRevista Brasileira de Farmacognosia v.22 n.3 20122012-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-695X2012000300002en10.1590/S0102-695X2012005000022 |
institution |
SCIELO |
collection |
OJS |
country |
Brasil |
countrycode |
BR |
component |
Revista |
access |
En linea |
databasecode |
rev-scielo-br |
tag |
revista |
region |
America del Sur |
libraryname |
SciELO |
language |
English |
format |
Digital |
author |
Armstrong,Lorene Duarte,Márcia do Rocio Miguel,Obdulio Gomes |
spellingShingle |
Armstrong,Lorene Duarte,Márcia do Rocio Miguel,Obdulio Gomes Morpho-anatomy of the leaf and stem of Eugenia pyriformis |
author_facet |
Armstrong,Lorene Duarte,Márcia do Rocio Miguel,Obdulio Gomes |
author_sort |
Armstrong,Lorene |
title |
Morpho-anatomy of the leaf and stem of Eugenia pyriformis |
title_short |
Morpho-anatomy of the leaf and stem of Eugenia pyriformis |
title_full |
Morpho-anatomy of the leaf and stem of Eugenia pyriformis |
title_fullStr |
Morpho-anatomy of the leaf and stem of Eugenia pyriformis |
title_full_unstemmed |
Morpho-anatomy of the leaf and stem of Eugenia pyriformis |
title_sort |
morpho-anatomy of the leaf and stem of eugenia pyriformis |
description |
Eugenia pyriformis Cambess., known as uvaia, is a species of Myrtaceae native to Brazil. Its leaves are used in folk medicine to treat gout because they possess the property of inhibiting xanthine oxidase, an enzyme involved in the conversion of xanthine into uric acid. The objective of this work was to study the leaf and stem morpho-anatomy of E. pyriformis, in order to contribute to what is known about the Brazilian flora, and this medicinal plant and potential vegetal drug. Samples of mature leaves and young stems were fixed and sectioned by freehand, or embedded in glycol methacrylate and sectioned with a microtome, and then stained. In addition, microchemical tests and scanning electron microscopy were performed. The leaf is simple, symmetric, elliptic-lanceolate, with an acute apex and base, and an entire margin. The epidermis is uniseriate and coated with a moderately thick cuticle. The stomata are anomocytic and inserted at the same level as the adjacent cells. Unicellular non-glandular trichomes are abundant on the abaxial surface. The mesophyll is dorsiventral. In transverse section, the midrib is plano-convex and the petiole is circular, and both of these structures have a single bicollateral vascular bundle. In the stem, the vascular cylinder consists of external phloem, xylem and internal phloem, traversed by narrow rays. Phenolic compounds, druses and prismatic crystals of calcium oxalate are also present in the leaf and stem. |
publisher |
Sociedade Brasileira de Farmacognosia |
publishDate |
2012 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-695X2012000300002 |
work_keys_str_mv |
AT armstronglorene morphoanatomyoftheleafandstemofeugeniapyriformis AT duartemarciadorocio morphoanatomyoftheleafandstemofeugeniapyriformis AT miguelobduliogomes morphoanatomyoftheleafandstemofeugeniapyriformis |
_version_ |
1756399390319181824 |