Titre:	Evolutionary features of microspore and pollen grain development in Cyperaceae
Auteur(s):	Rocha, Danilo Massuia Nogueira, Fernanda Mayara André, Thiago José de Carvalho Mariath, Jorge Ernesto de Araujo Vanzela, André Luís Laforga
metadata.dc.identifier.orcid:	https://orcid.org/0000-0003-0059-7962 https://orcid.org/0000-0003-1830-4929 https://orcid.org/0000-0003-4148-3662 https://orcid.org/0000-0002-2776-6781 https://orcid.org/0000-0002-2442-2211
metadata.dc.contributor.affiliation:	Universidade Estadual de Londrina, Laboratório de Citogenética e Diversidade Vegetal Universidade de São Paulo, Faculdade de Filosofia Ciências e Letras de Ribeirao Preto Universidade de Brasília, Campus Universitário Darcy Ribeiro, Instituto de Ciências Biológicas, Departamento de Botânica Universidade Federal do Rio Grande do Sul, Instituto de Biociências, Departamento de Botânica, Laboratório de Anatomia Vegetal Universidade Estadual de Londrina, Laboratório de Citogenética e Diversidade Vegetal
Assunto::	Cyperaceae Plantas - filogenia Plantas - desenvolvimento
Date de publication:	2-aoû-2023
Editeur:	Springer Nature
Référence bibliographique:	ROCHA, Danilo Massuia et al. Evolutionary features of microspore and pollen grain development in Cyperaceae. Plant Reproduction, [S.l.], v. 36, p. 333-342, 2023. DOI: https://doi.org/10.1007/s00497-023-00477-4. Disponível em: https://link.springer.com/article/10.1007/s00497-023-00477-4#article-info. Acesso em: 20 ago. 2025.
Abstract:	Cyperaceae members present atypical microsporogenesis, in which one meiotic product is functional while the other three degenerate, culminating in pseudomonad pollen formation. Differences during development, such as pseudomonad shape and degenerative microspore positioning, are seen throughout the family, but no phylogenetic interpretation has been made regarding these variances thus far. In this study, we analyzed the early- and late-diverging sedge genera Hypolytrum and Eleocharis, respectively, while comparing them to data available in the literature and conducting an ancestral character reconstruction for pseudomonad traits. Light microscopy results show that pseudomonad development in Hypolytrum is homologous to several other sedge genera, presenting apical degenerative microspores. However, pseudomonads are round and centrally arranged in the anther locule in this case, which consists of a pleisiomorphic trait for the family. The basal positioning of degenerative microspores is restricted to Rhynchospora, consisting of an apomorphic trait for this genus. Despite these differences, ultrastructural analysis of Eleocharis pseudomonad revealed shared features with other genera studied, which include variations in chromatin condensation and cytoplasmic turnover in functional cells. These common features seem related to the different cellular fates seen during microspore development and further corroborate the synapomorphic status of pseudomonads in sedges.
metadata.dc.description.unidade:	Instituto de Ciências Biológicas (IB) Departamento de Botânica (IB BOT)
DOI:	https://doi.org/10.1007/s00497-023-00477-4
metadata.dc.relation.publisherversion:	https://link.springer.com/article/10.1007/s00497-023-00477-4#article-info
Collection(s) :	Artigos publicados em periódicos e afins

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