The Ligule in Poaceae: a Historical and Evolutionary Review

Autor(es)

Edson-Chaves, Bruno ; da Silva, Otavio Luis M. ; Clark, Lynn G. ; Melo-de-Pinna, Gladys Flavia De A.

• Tipo de documento: Artigo Científico
• Fonte: BOTANICAL REVIEW; v. N/A, p. 40-pg., 2022-08-24.

Resumo

Ligules are classified, predominantly, on their position and morphology, which are still without a consensus as to their nature and diversity in an evolutionary context in Poaceae. Based on a broad review of this structure, we have identified five hypotheses for the definition of ligules, originating between the years 1800 and 1834; some of these hypotheses are still valid today. Our results also demonstrate that 95.28% of the family representatives have homoligulate ventral ligules and 1.75% have heteroligulate ventral ligules, with Panicoideae being the subfamily with the greatest morphological diversity of ligules. Dorsal and culm leaf ligules occur mainly in Puelioideae and Bambusoideae (except in Olyreae), and may occasionally occur in Pooideae, Panicoideae and Chloridoideae. Although homoligulate and ciliate ventral ligules are ancestral states in the Poaceae, several reversals occurred within the subfamilies so that the eciliate membrane type is more common (especially in the BOP clade). (AU)

• Processo FAPESP: 19/15195-8 - Bases ontogenéticas de estruturas foliares em representantes de Sapindales e Poales
• Beneficiário: Gladys Flávia de Albuquerque Melo de Pinna
• Modalidade de apoio: Auxílio à Pesquisa - Regular