Pollination biology and breeding system of syntopic Adenocalymma nodosum and A. peregrinum (Bignonieae, Bignoniaceae) in the Brazilian savanna

Autor: Engel, Thaíssa Brogliato Junqueira, 1989
Přispěvatelé: UNIVERSIDADE ESTADUAL DE CAMPINAS
Rok vydání: 2016
Předmět:
Zdroj: Repositório da Produção Científica e Intelectual da Unicamp
Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
Repositório Institucional da Unicamp
Popis: Agradecimentos: This work was part of the Doctoral Thesis of the first author in the Post-Graduate Program of Ecology and Conservation of Natural Resources at Universidade Federal de Uberlândia - UFU, supported by a research fellowship from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES). This work was also supported by research grants by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (486091/2007-4) and by CAPES (Programa Nacional de Pós-Doutorado - PNPD 23038.008068/2010-95). We thank administration of Clube de Caça e Pesca Itororó de Uberlândia, as administration of Campo Alegre farm for permissions to carry out the study in these areas; Dra. Lúcia G. Lohmann (Universidade de São Paulo - USP) for plants identification; Dr. Léo Correia da Rocha Filho (USP), Dra. Cláudia Inês Silva (USP), and Dra. Solange Cristina Augusto (UFU) for bees identification; Msc. Thatiana Martins dos Santos Mesquita for the help with nectar measurements of A. peregrinum; Dra. Júlia Yamagishi-Costa (UFU) for critical reading of the manuscript; and Natanael Nascimento dos Santos for illustrations Abstract: The tropical Bignoniaceae is mostly late-acting self-incompatible (LSI) and depends on a guild of medium to large sized bees for their pollination. Adenocalymma nodosum and A. peregrinum are syntopic shrubs in savanna areas with similar flowers and flowering overlap. In this sense, the aims of the present study were to analyse the pollination biology and breeding systems of these species, and to check for bilateral compatibility which could hinder reproductive isolation and species boundaries. Flower features such as yellow corolla, sweet scent and diurnal one-day anthesis were similar between species. However, they differed in nectar production patterns, which showed higher volume in A. nodosum and was irregular in A. peregrinum. The main pollinators for both species were medium to large Centridini bees. Many nectar and pollen robbers may disturb effective pollination and help to explain the low natural fruit-set. The species were self-sterile but pollen tube growth down to the ovules and differential ovary development indicated LSI, as in most Bignoniaceae studied to date, which reinforce the idea of family clustering for this self-incompatibility system. Fruit-set from interspecific hand pollinations was similar to those of intraspecific cross-pollinations, with high seed viability (88%) and seedling development. Similar floral biology and guild of pollinators, and bilateral inter-compatibility indicate that natural hybridization is possible among these species CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES Fechado
Databáze: OpenAIRE
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