ruit morphoanatomy of Astronium Jacq. and Myracrodruon Allemao (Anacardiaceae): taxonomic implications and development of the calycinal wing

Author(s)

Alves de Lima, Elimar ^[1] ; Dantas Tolke, Elisabeth ^[2] ; Luiza da Silva-luz, Cintia ^[2] ; Demarco, Diego ^[2] ; Maria Carmello-Guerreiro, Sandra ^[1]

Affiliation

^[1] Univ Estadual Campinas UNICAMP, Inst Biol, Dept Biol Vegetal, CEP, BR-13083970 Campinas, SP - Brazil

^[2] Univ Sao Paulo, Inst Biociencias, Dept Bot, CEP, BR-05508090 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Rev. bras. Bot.; AUG 2021.
• Web of Science Citations: 0

Abstract

Astronium and Myracrodruon are small genera of Anacardiaceae characterized by having fruits with calycinal wings, which play an important role in dispersion. Molecular phylogenetic studies have indicated that both genera form a monophyletic clade, but the taxonomic circumscription remains controversial, with several discussions either recognizing Myracrodruon as a genus or an infrageneric category of Astronium. In this study, the fruit anatomy of both genera was reevaluated to further develop the understanding of their circumscription and taxonomic position. To this end, the morphoanatomy of the ripe fruits of Myracrodruon balansae and seven species of Astronium was analyzed using standard techniques of light microscopy. In addition, the fruit ontogeny in both genera was evaluated for distinguishable differences and similarities among them. As a result of the emanating study, it can be concluded that fruits of Astronium and Myracrodruon, previously classified as pseudosamara and drupe, respectively, should both be called pseudosamara. Findings such as uniseriate exocarp, parenchymatic mesocarp with large secretory ducts, endocarp organized in discrete layers, and similar development of the calycinal wings support the inclusion of Myracrodruon as a section of Astronium. (AU)

• FAPESP's process: 19/10636-6 - Floral morphology and development of Biebersteiniaceae: implications for floral evolution and diversification of Sapindales
• Grantee: Elisabeth Emília Augusta Dantas Tölke
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/18002-2 - Sapindales: phylogeny and diversification in the Neotropical Region
• Grantee: José Rubens Pirani
• Support Opportunities: Research Projects - Thematic Grants