Anatomy of vegetative organs with an emphasis on the secretory structures of two species of Aldama (Asteraceae-Heliantheae)

Autor(es)

Oliveira, Tuane ^[1] ; Bombo, Aline Bertolosi ^{[1, 2]} ; Appezzato-Da-Gloria, Beatriz ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Ciencias Biol, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba, SP - Brazil

^[2] Univ Estadual Campinas, Programa Posgrad Biol Vegetal, Inst Biol, BR-13081970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BOTANY; v. 91, n. 6, p. 335-342, JUN 2013.
• Citações Web of Science: 16

Resumo

Aldama arenaria (Baker) E.E. Schill. \& Panero and Aldama robusta (Gardner) E.E. Schill. \& Panero are aromatic plants, morphologically very similar and usually confused on the analysis of exsiccates. The present study aimed to identify the secretory structures present in vegetative organs and to survey for anatomical features with diagnostic value between A. arenaria and A. robusta based on an examination of these organs. Aldama arenaria and A. robusta exhibit hydathodes in the dentate ornamentations of the leaf margins and apices in addition to glandular trichomes, secretory cavities and ducts, all of which vary with respect to type and location in each species. Xylopodia and adventitious roots constitute the underground system. The xylopodium is covered by epidermis or by suberised cells resulting from periclinal divisions of parenchyma cells. The tuberisation process of adventitious roots results mainly from hypertrophy and hyperplasia of medullary cells, especially in A. arenaria. Through anatomical analysis, useful features for distinction between A. arenaria and A. robusta in exsiccates and fresh materials were identified, and these features were related mainly to the position and frequency of secretory structures. (AU)

• Processo FAPESP: 10/02005-1 - Anatomia, Germinação e Análise Comparativa do Óleo Essencial de Viguiera arenaria Baker e V. robusta Gardner (Asteraceae-Heliantheae)
• Beneficiário: Tuane Santos de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 10/51454-3 - Estudos morfoanatômicos, metabolômicos e moleculares como subsídios à sistemática de espécies de Asteraceae e acesso ao seu potencial farmacológico
• Beneficiário: Beatriz Appezzato da Glória
• Modalidade de apoio: Auxílio à Pesquisa - Temático