Evolution of distyly breakdown in Palicoureeae Robbr. & Manen and Psychotrieae Cham. & Schltdl. (Rubiaceae)
Metadatos
Mostrar el registro completo del ítemEditorial
Sociedad Botánica de Brasil
Materia
Breeding system evolution Heterostyly Homostyly Monomorphism Plant reproduction
Fecha
2022Referencia bibliográfica
Rodriguez, E. B... [et al.]. Evolution of distyly breakdown in Palicoureeae Robbr. & Manen and Psychotrieae Cham. & Schltdl. (Rubiaceae). Acta Botanica Brasilica, 2022, 36: e2021abb0242. doi: [10.1590/0102-33062021abb0242]
Patrocinador
Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG) APQ-02138-15 001; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) 306551/2014-4 474516/2013-0 477885/2012-8Resumen
Distyly is a floral polymorphism with reciprocal placement of male and female structures, heteromorphic selfincompatibility,
and other ancillary traits. However, breeding system breakdowns and loss of polymorphism are
common. Here we traced the diversification of breeding strategies in the type genera of tribes Palicoureeae and
Psychotrieae and discussed the evolution of distyly in a phylogenetic framework. We used literature and field
information for breeding systems transitions in 46 species of Palicourea and Psychotria. Beyond distyly, we found
four additional breeding systems, including monomorphism with herkogamy, homostyly (without herkogamy),
monoecy and dioecy. Breeding transitions arose independently and were mostly derived from distyly. Only two
species presented monomorphism as an intermediate state into gender specialization. It was not possible to evaluate
the origin and evolutionary pathways for distyly in Psychotria and Palicourea as a whole, since distyly seems to be
ancestral to their diversification. Breeding transitions in Psychotria and Palicourea appeared to be phylogenetically and
biogeographically independent and occurred mostly in islands or isolated forest fragments, with distinct divergence
times. Breeding transitions were not related to changes in ploidy. We propose that evolution of breeding transitions
in Psychotria and Palicourea represent phylogenetically independent strategies to reproductive assurance in isolated
or disturbed habitats.