Consulta: subjectFacets:"Nectaries"
Registros recuperados: 4
Data/hora: 01/06/2024 16:46:39

Occurrence and structure of extrafloral nectariesin Pterodon pubescens Benth. and Pterodon polygalaeflorus Benth.
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Paiva,Élder Antônio Sousa e; Morais,Helena Castanheira de; Isaias,Rosy Mary dos Santos; Rocha,Dulce Maria Sucena da; Oliveira,Paulo Eugênio.
Extrafloral nectaries (EFNs) are structurally variable and widely spread among the angiosperms. The occurrence of EFNs in leaves of Pterodon polygalaeflorus Benth. and Pterodon pubescens Benth. (Fabaceae: Papilionoideae) were detected in adult specimens, at the time of production of new buds and flowers. The goals of the present study are to register the occurrence of the EFNs in P. pubescens and P. polygalaeflorus, and provide comparative data on the anatomical structures. The EFNs occur in the rachis and are located under the insertion of each petiolule. Each nectary consists of a small elevation whose apical portion is deeply invaginated, resulting in a depression (secretory pole), a common characteristic of both species. Unicellular, nonglandular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nectaries; Plant anatomy; Plant secretions; Nectar; Plant protection; Herbivores; Plant animal relations.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000200002

Structure and distribution of glandular trichomes in three species of Bignoniaceae
Provedor de dados: Acta Amazonica
Autores: FRÓES,Fabíola Fernandes Paiva de Castro; GAMA,Thália do Socorro Serra; FEIO,Ana Carla; DEMARCO,Diego; AGUIAR-DIAS,Ana Cristina Andrade de.
Glandular trichomes play a major role in the morphological characterization of the Bignoniaceae. Due to their great diversity of forms and functions, this study aimed to inventory the glandular trichomes present in the aerial vegetative axis of Amphilophium magnoliifolium, Martinella obovata and Stizophyllum riparium, analyze their structure and register the participation of ants in these plants. Fresh samples from the nodal region, petiole and from medium to apical regions of the leaflet blade were fixed and processed according to usual methods in light and scanning electron microscopies. The glandular trichomes found were: peltate, capitate, stipitate, and patelliform/cupular. Peltate trichomes are the most abundant ones and present the most uniform...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bignonieae; Nectaries; Secretory structures; Stipitate trichome.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000400347

A literature review of the pollination strategies and breeding systems in Oncidiinae orchids
Provedor de dados: Acta Botanica Brasilica
Autores: Castro,Jonas B.; Singer,Rodrigo B.
ABSTRACT Oncidiinae is an exclusively Neotropical orchid subtribe with about 1600 described species and an impressive array of vegetative and floral morphological adaptations. We present the results of a literature survey on the pollination strategies and breeding systems of this orchid subtribe. The flowers are pollinated by a wide range of insects (mostly bees) and, sometimes, hummingbirds. Several genera reward their pollinators with floral resources such as oils, nectar or perfumes. Whereas pollination by oil-gathering bees likely evolved several times within Oncidiinae, exclusive pollination by perfume-gathering male Euglossine bees is likely restricted to a set of closely-related genera. Pollination by food or sexual deception is also present within...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breeding systems; Deception; Elaiophores; Fruiting success; Nectaries; Oncidiinae; Orchids; Osmophores; Pollination strategies.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400618

Transfer cells in trichomatous nectary in Adenocalymma magnificum (Bignoniaceae)
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: GAMA,THÁLIA S.S.; AGUIAR-DIAS,ANA CRISTINA A. DE; DEMARCO,DIEGO.
ABSTRACT Transfer cells are specialized cells that play an important role where there are high energy costs due to facilitation of transmembrane flow of solutes. This study aimed to investigate the ontogenesis, histochemistry and ultrastructure of glandular trichomes focusing on stalk cells and their possible transfer function. Samples of prophylls of axillary buds, calyces of flowers in anthesis, and flower buds in different stages of development were collected, fixed and processed according to the common methods of microscopy. The glandular trichomes are composed of a secretory head with its cells in columnar format. The stalk is formed by two layers of cells, with the upper layer composed of cuboidal cells where the wall starts to thicken at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glandular trichomes; Nectaries; Ontogenesis; Secretory structures; Wall ingrowths.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200527