Leaf and inflorescence peduncle anatomy: a contribution to the taxonomy of Rapateaceae

Autor(es)

Ferrari, Renata Callegari ^[1] ; Scatena, Vera Lucia ^[1] ; Oriani, Aline ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Biociencias, Dept Bot, BR-13506900 Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLANT SYSTEMATICS AND EVOLUTION; v. 300, n. 7, p. 1579-1590, AUG 2014.
• Citações Web of Science: 3

Resumo

The anatomy of leaves and inflorescence peduncles was studied in species of Monotrema (4), Stegolepis (1) and Saxofridericia (1), aiming to contribute to the taxonomy of Rapateaceae. The form and structure of leaf blade midrib and the form of the inflorescence peduncle are diagnostic characteristics for the studied species. Monotrema is distinguished by: epidermal and vascular bundle outer sheath cells containing phenolic compounds in both organs; leaf blade with palisade and spongy chlorenchyma, arm-parenchyma, and air canals between the vascular bundles; leaf sheath with phenolic idioblasts in the mesophyll; inflorescence peduncle with tabular epidermal cells and air canals in the cortex and pith. Such characteristics support the recognition of Monotremoideae, which includes Monotrema. Stegolepis guianensis is distinguished by thick-walled epidermal cells and a plicate chlorenchyma in both organs; leaf blade with subepidermal fiber strands in abaxial surface and a heterogeneous mesophyll; inflorescence peduncle with rounded epidermal cells, a hypodermis with slightly thick-walled cells, and a pith with isodiametric cells and vascular bundles. Saxofridericia aculeata is distinguished by papillate epidermal cells in both organs; unifacial leaf blade with subepidermal fiber strands in both surfaces and a regular chlorenchyma; leaf sheath with a hypodermis in both surfaces and fiber bundles in the mesophyll; inflorescence peduncle with an undefined cortex and a hypodermis with thick-walled cells. S. guianensis shares few characteristics with S. aculeata, supporting their placement in different tribes. (AU)

• Processo FAPESP: 11/18275-0 - Anatomia de espécies de Poales (monocotiledôneas): inferências taxonômicas
• Beneficiário: Vera Lucia Scatena
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/11536-3 - Embriologia comparada de espécies de xyrídeas (Poales - Monocotiledôneas)
• Beneficiário: Aline Oriani
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado