Occurrence and evolutionary inferences about Kranz anatomy in Cyperaceae (Poales)

Autor(es)

Martins, Shirley ^[1] ; Alves, Marccus ^[2] ; Scatena, Vera L. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Oeste Parana, Ctr Ciencias Biol & Saude, Lab Bot, UNIOESTE, Rua Univ, 2069, Jardim Univ, BR-85819110 Cascavel, PR - Brazil

^[2] Univ Fed Pernambuco, UFPE, Ctr Ciencias Biol, Dept Bot, Lab Morfotaxon Vegetal, BR-50670901 Recife, PE - Brazil

^[3] Univ Estadual Paulista, UNESP, Inst Biociencias, Dept Bot, Lab Anat Vegetal, BR-13506900 Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 87, n. 4, p. 2177-2188, DEC 2015.
• Citações Web of Science: 1

Resumo

ABSTRACT Cyperaceae is an angiosperm family with the greatest diversity of species with Kranz anatomy. Four different types of Kranz anatomy (chlorocyperoid, eleocharoid, fimbristyloid and rhynchosporoid) have been described for this angiosperm family, and the occurrence and structural characteristics of these types are important to trace evolutionary hypotheses. The purpose of this study was to examine the available data on Cyperaceae Kranz anatomy, emphasizing taxonomy, geographic distribution, habitat and anatomy, to infer the potential origin of the Kranz anatomy in this family. The results showed that the four types of Kranz anatomy (associated with C4 photosynthesis) in Cyperaceae emerged numerous times in unrelated phylogenetic groups. However, the convergence of these anatomical types, except rhynchosporoid, was observed in certain groups. Thus, the diverse origin of these species might result from different environmental pressures that promote photorespiration. Greater variation in occurrence of Kranz anatomy and anatomical types was observed inEleocharis, whose emergence of the C4 pathway was recent compared with other genera in the family, and the species of this genus are located in aquatic environments. (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