Developmental anatomy of Cyperus laxus (non-Nranz) and Fimbristylis dichotoma (Kranz) (Cyperaceae, Poales) and tissue continuity

Autor(es)

Martins, Shirley ^[1] ; Scatena, Vera L. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Oeste Parana Unioeste, Ctr Ciencias Biol & Saude, BR-85819110 Cascavel, PR - Brazil

^[2] Univ Estadual Paulista, Inst Biociencias, Dept Bot, BR-13506900 Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 85, n. 2, p. 605-613, JUN 2013.
• Citações Web of Science: 2

Resumo

The Cyperaceae species are present in different ecosystems and constitute the herbaceous extract. Of the approximately 5,500 species of the family; a third has Kranz anatomy, representing an important characteristic of the taxonomy and phylogeny of the group. In Cyperus laxus L. (non-Kranz) and Fimbristylis dichotoma Vahl (Kranz), development begins with germination that is marked by the emergence of the coleoptiles, followed by the primary root, which is ephemeral. The rhizome originates from the mesocotyl and it promotes the vascular connection between the roots, leaves and scapes. The continuity of the tissues is evidenced by the presence of an endodermis and pericycle in all vegetative organs. Leaves and scapes differ between the two species by the arrangement of mesophyll cells, which is regular in Cyperus laxus (non-Kranz) and arranged radially in Fimbristylis dichotoma (Kranz). Also differ in the number of bundles sheaths: two in Cyperus laxus (non-Kranz) and three in Fimbristylis dichotoma (Kranz). The outer bundle sheath in both species constitutes the endodermis, and the inner sheath in Cyperus laxus and the middle and inner sheaths in Fimbristylis dichotoma constitute the pericycle. (AU)

• Processo FAPESP: 08/09380-2 - Ontogenia e ultra-estrutura da anatomia Kranz em espécies brasileiras de Cyperaceae: subsídios à taxonomia e filogenia
• Beneficiário: Shirley Martins Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/18275-0 - Anatomia de espécies de Poales (monocotiledôneas): inferências taxonômicas
• Beneficiário: Vera Lucia Scatena
• Modalidade de apoio: Auxílio à Pesquisa - Regular