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Leaf surfaces of Gomphrena spp. (Amaranthaceae) from Cerrado biome
Fank-de-Carvalho, Suzane Margaret; Gomes, Misléia Rodrigues de Aguiar; Silva, Pedro Ítalo Tanno; Báo, Sônia Nair.
Affiliation
  • Fank-de-Carvalho, Suzane Margaret; Universidade de Brasília. Departamento de Biologia Celular. Laboratório de Microscopia Eletrônica. Brasília. BR
  • Gomes, Misléia Rodrigues de Aguiar; Universidade de Brasília. Departamento de Biologia Celular. Laboratório de Microscopia Eletrônica. Brasília. BR
  • Silva, Pedro Ítalo Tanno; Universidade de Brasília. Departamento de Biologia Celular. Laboratório de Microscopia Eletrônica. Brasília. BR
  • Báo, Sônia Nair; Universidade de Brasília. Departamento de Biologia Celular. Laboratório de Microscopia Eletrônica. Brasília. BR
Biocell ; Biocell;34(1): 23-35, Apr. 2010. ilus, tab
Article de En | LILACS | ID: lil-595047
Bibliothèque responsable: AR40.1
ABSTRACT
The leaf structure and micromorphology characterize plant species and reflex its interactions with the environment. Leaf epidermis sculptures aid high transpiration plants on light reflection. The form and distribution of epicuticular wax crystalloids are important to characterize the surface. Aiming to know the micromorphology and the ultrastructure of G. arborescens, G. pohlii and G. virgata, leaves of these Cerrado native species were collected in Brasília, Distrito Federal, Brazil, at the Olympic Center of the Universidade de Brasília and at Reserva Ecológica do Roncador. Leaves of G. globosa, an Indian native species, were also studied for comparison. Leaves were fractionated, fixed and treated for observation under optical and scanning electron microscope. A description of the leaf epidermis is provided, alo ng with some quantitative data to help the species taxonomy and support future studies on their physiology all species are amphistomatic and have Stomatal Index between 7.27 and 18.99. The Gomphrena spp. studied have epicuticular wax platelets and wax sculptures over their larger trichome, which are relevant for their taxonomy. Over the Cerrado species cuticle, epicuticular wax is damaged by fungi hyphae development. The presence of epicuticular wax on Gomphrena spp. leaves corroborates the phylogenetical alliance between Amaranthaceae and Chenopodiaceae.
Sujet(s)
Recherche sur Google
Indice: LILACS Sujet Principal: Feuilles de plante / Amaranthaceae Pays comme sujet: America do sul / Brasil langue: En Texte intégral: Biocell Thème du journal: C‚lulas Année: 2010 Type: Article
Recherche sur Google
Indice: LILACS Sujet Principal: Feuilles de plante / Amaranthaceae Pays comme sujet: America do sul / Brasil langue: En Texte intégral: Biocell Thème du journal: C‚lulas Année: 2010 Type: Article