Anatonia de raízes, folhas e escapos de espécies de Paepalanthus subgênero Platycaulon (Eriocaulaceae)
Nenhuma Miniatura disponível
Data
1996-12-01
Autores
Scatena, Vera Lucia [UNESP]
De Moraes, Ana Rosa Soares
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The anatomical features of roots, leaves and scapes of the subgenus Platycaulon, genus Paepalanthus (Eriocaulaceae) that grow in the Brasilian rupestrian fields of Serra do Cipó - MG - Brazil were studied. The following main anatomical features were found: epidermis cells of varied thicknesses, chlorenchyma with compact or spread organization and leaf margin shape in the leaves; the scapes with continuous or discontinuous endodermis, divided or undivided pericycle, vascular bundles absent in the cortex and in the pith. These anatomical characteristics of the leaves and scapes occur in different species and can be used to separate them into Divise or Conferti sections. It was possible to confirm the proposed taxonomy based only on the morphological characteristics. Other anatomical features such as: presence or absence of air in the cortex roots and hypodermis which originate water parenchyma reserves in the mesophyll, can be an adaptative response that plants towards produce the environmental factors in this ecosystem.
Descrição
Palavras-chave
Adaptation, Leaves and scapes anatomy, Paepalanthus, Roots, Taxonomy
Como citar
Arquivos de Biologia e Technologia, v. 39, n. 4, p. 1021-1035, 1996.