Tribe Condamineeae appears to be well supported in recent phylogenetic studies. However, the species of Bathysa were divided into two clades, leading to restoration of Schizocalyx. We studied the reproductive biology of one species from each clade, which occur sympatrically in the montane Brazilian Atlantic forest. Flowering overlap was short (from December to March in B. australis and from February to June in S. cuspidatus). The flowers of both species are protogynous and homostylous and last for about 3 days. The unit of pollination in B. australis is the inflorescence. Its flowers have a greenish hypocrateriform corolla (tube about 5 mm long) and were mainly pollinated by bees and wasps in search of nectar. Schizocalyx cuspidatus has white flowers with an infundibuliform corolla (tube about 8 mm long), and its main pollinators were stingless bees in search of pollen. The pollination systems of the two species did not correspond to their pollination syndromes. Morphological differences between Bathysa and Schizocalyx were reflected in their pollination systems, with greater phenotypic specialization in S. cuspidatus, the flowers of which offer pollen as the main resource, an unusual feature within Rubiaceae. Schizocalyx cuspidatus showed higher reproductive capacity by having more inflorescences per plant, more ovules per flower, and twice the proportion of flowering individuals. However, the reproductive efficiency (fruit set, seed/ovule ratio) did not differ between the species, despite the higher frequency of visits by pollinators to S. cuspidatus. Self‐compatibility in B. australis and self‐incompatibility in S. cuspidatus seem to explain these results.
ResumoJacquinia armillaris é uma espécie que ocorre no litoral nordeste e sudeste do Brasil em formações sujeitas a intenso processo de fragmentação. Para melhor entendimento da ecologia de J. armillaris em seu habitat natural esse trabalho avaliou a biologia reprodutiva dessa espécie na restinga do Parque Estadual Paulo César Vinha, Espírito Santo, Brasil. Por meio da descrição de eventos relacionados à floração, morfologia das flores, receptividade estigmática, sistema de reprodução, viabilidade polínica e comportamento dos visitantes florais, observou-se que Jacquinia armillaris apresenta características da síndrome de cantarofilia e visitação de dois grupos de Coleoptera: Carpophilus sp. (Nitidulidae) e Horistonotus sp. (Elateridae). Os dados também sugerem que a espécie é autocompatível, porém os testes de cruzamento revelam que a espécie depende da polinização promovida pelos visitantes florais. A espécie não apresentou agamospermia e crescimento clonal, o que somado a uma baixa produção de pólen viável, a síndrome de cantarofilia e outros rigores comuns em ambientes de restinga pode resultar em anos com baixa produção de frutos. Palavras-chave: Jacquinia, cantarofilia, biologia reprodutiva, restinga. AbstractJacquinia armillaris occurs in the coastal zone of Northeast and Southeast Brazil in greatly reworked estuarine landscapes. For a better understanding of the ecology of J. armillaris in its natural habitat, this study assessed the reproductive biology of this species in the restinga of Parque Estadual Paulo César Vinha, Espírito Santo, Brazil. According to the data on flowering, floral morphology, stigmatic receptivity, reproductive system, pollen viability, and behavior of floral visitors, Jacquinia armillaris showed characteristics of cantarophily syndrome and is visited by two Coleopteras: Carpophilus sp. (Nitidulidae) and Horistonotus sp. (Elateridae). The data suggest that the species is self-compatible. However, J. armillaris depends on pollination promoted by floral visitors. Absence of agamospermy and clonal growth, plus low viable production of pollen, cantharophily and common restinga rigor are discussed as responsible factors for low fruit set, consequently producing stochastic variation in seed recruitment. Key words: Jacquinia, cantarophily, reproductive biology, Brazilian sandy coastal plain. (Ståhl 2010; APG 2009; Källersjö & Ståhl 2003). Dentre as espécies desse gênero destaca-se Jacquinia armillaris Jacq., uma espécie restrita à vegetação pós-praia de restinga que ocorre no litoral Norte e Sudeste do Brasil e que, por seu porte arbustivo ou arbóreo (até seis metros de altura), se destaca nessa vegetação predominantemente reptante (Fabris et al. 1990;Garcia 1999 Mariana Andrich
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.