Consulta: subjectFacets:"Nectar dynamics"
Registros recuperados: 2
Data/hora: 08/06/2024 12:40:24

When hummingbirds are the thieves: visitation effect on the reproduction of Neotropical snowbell Styrax ferrugineus Nees &amp;amp; Mart (Styracaceae)
Provedor de dados: Acta Botanica Brasilica
Autores: Maruyama,Pietro Kiyoshi; Custódio,Luciana Nascimento; Oliveira,Paulo Eugênio.
The spectrum of floral visitors associated with a particular plant is frequently larger than predicted by the traditional concept of floral syndromes and the role that unpredicted visitors play in plant reproduction deserves attention. Hummingbirds are frequently recorded visiting flowers with distinct floral syndromes, especially in some hummingbird flower poor ecosystem such as the Cerrado. In this study we investigated the effect of frequent hummingbird visits on the reproduction of melittophilous Styrax ferrugineus. The flowers were visited by many different insect groups and visits by hummingbirds were frequent, especially early in the morning when nectar availability was higher. Nectar parameters varied considerably during the flower life span, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Nectar dynamics; Nectar thieves; Pollination syndromes.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000100007

Flower trade-offs derived from nectar investment in female reproduction of two Nicotiana species (Solanaceae)
Provedor de dados: Acta Botanica Brasilica
Autores: Galetto,Leonardo; Araujo,Francielle Paulina; Grilli,Gabriel; Amarilla,Leonardo D.; Torres,Carolina; Sazima,Marlies.
ABSTRACT Animal-pollinated flowers may orient resources for competing activities, such as nectar production for attracting flower visitors but then saving nectar (through inhibiting nectar production or by final resorption) for the subsequent maturation of fruits and seeds. Nectar production is continuous in Nicotiana longiflora and N. alata after flower opening, but early nectar removal reduces total secreted nectar. Resource trade-off between nectar investment and seed production were experimentally assessed in manually pollinated flowers experiencing different numbers of repeated nectar removals, while controlling for maternal effects. We expected that flowers with less nectar secretion produce larger seed sets. The results showed that for both species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nectar dynamics; Nectar removal effects; Nectar saving; Nicotiana alata; N. longiflora; Seed production.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300473