Mutualistic Interactions
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Leaf glands of Banisteriopsis muricata (Malpighiaceae): distribution, secretion composition, anatomy and relationship to visitors
ABSTRACT Leaf glands are common structures in Malpighiaceae and exhibit great morphological diversity, yet information on their anatomy, secretion and type of visitors remains scarce. The aim of this study was to describe the distribution, anatomical development and chemical and functional properties of leaf glands of Banisteriopsis muricata (Malpighiaceae).
Acta Bot. Bras.. Publicado em: 2017-09
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2. Ecology of interactions between ants and plants with extrafloral nectaries in a neotropical savanna: temporal variation in the network of interactions and their effects on leaf herbivory / Ecologia das interações entre formigas e plantas com nectários extraflorais em uma savana neotropical: variação temporal na rede de interações e seus efeitos sobre a herbivoria foliar
Estudos de interações envolvendo formigas e plantas com nectários extraflorais são comuns na literatura, entretanto, devido à grande diversidade de espécies envolvidas e à variação nos resultados das interações, pouco se conhece a respeito da dinâmica e estrutura dessas relações no âmbito da comunidade. Dessa forma, este estudo propôs avaliar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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3. Flower-visiting insects of five tree species in a restored area of semideciduous seasonal forest
The reinstatement of biodiversity and ecological processes must be the major goal in restoration projects, which requires the establishment of biological interactions in addition to native plant population recovery. Therefore, we assessed the flower visitors of five tree species in a restored area of Semideciduous Seasonal Forest, in Ribeirão Preto, SP, Bra
Neotropical Entomology. Publicado em: 2011-08
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4. Costs and benefits of ant attendance to the extrafloral nectaries of Crotalaria pallida (Fabaceae) / Custos e beneficios da visita de formigas aos nectarios extraflorais de Crotalaria pallida (Fabaceae)
Ants may have a positive or negative effect on the fitness of the plants with which they interact, depending on its relationship with herbivores, pollinators and seed dispersers. A remarkable characteristic of the interactions between ants and plants is the high frequency with which they are mutualistic. The supposed benefit of these interactions is that the
Publicado em: 2008
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5. Bula da glândula metapleural de formigas cortadeiras: inferências quanto à defesa antimicrobiana / Bulla of the metapleural glands of leafcutter ants: Inferences as the antimicrobial defences
Leafcutter ants live in a world of complex interactions, the most notable being their cultivation of a mutualistic fungus on vegetable subtrates. These ants, and their mutualistic fungus gardens, are at risk from attack by parasitic microorganisms. To defend themselves and their mutualist, they have antimicrobial defences, such as substances secreted from th
Publicado em: 2008
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6. DispersÃo e predaÃÃo de grandes sementes por Sciurus aestuans L. em fragmentos de floresta AtlÃntica montana no Estado do EspÃrito Santo, Brasil
The plantâdispersor interactions influence the adaptive values of plants and animals, acting directly on the reproductive characters of plant species and life histories of animal species. The fruvigory pattern influences the seed shadow patterns of plants, the predation rates by invertebrates and consequently the germination, seedling survival and adult rec
Publicado em: 2004
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7. Moleculas organicas volateis: papel das mesmas em ecologia química, caminhos de fragmentação em espectrometria de massas e síntese
The chemical ecology research has benefit of the recent technological advances in: sampling techniques [SPME, solid phase micro extraction; static and dynamic headspaces applying special resins as absorbing material], chromatography (GC, HPLC), in detection (MS, NMR, IR), and availability of large libraries. Nevertheless, the identification of new volatile c
Publicado em: 2003
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8. The nested assembly of plant–animal mutualistic networks
Most studies of plant–animal mutualisms involve a small number of species. There is almost no information on the structural organization of species-rich mutualistic networks despite its potential importance for the maintenance of diversity. Here we analyze 52 mutualistic networks and show that they are highly nested; that is, the more specialist specie
National Academy of Sciences.
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9. Methanogenesis from Ethanol by Defined Mixed Continuous Cultures
Methanogenesis from ethanol by defined mixed continuous cultures was studied. Under sulfate-free conditions, a Desulfovibrio strain was used as the ethanol-degrading species producing acetic acid and hydrogen. In a two-membered mutualistic coculture, the hydrogen was converted to methane by a Methanobacterium sp. and pH was maintained at neutrality by the ad
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10. Metabolic Interdependence of Obligate Intracellular Bacteria and Their Insect Hosts†
Mutualistic associations of obligate intracellular bacteria and insects have attracted much interest in the past few years due to the evolutionary consequences for their genome structure. However, much less attention has been paid to the metabolic ramifications for these endosymbiotic microorganisms, which have to compete with but also to adapt to another me
American Society for Microbiology.
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11. The evolution of fungus-growing termites and their mutualistic fungal symbionts
We have estimated phylogenies of fungus-growing termites and their associated mutualistic fungi of the genus Termitomyces using Bayesian analyses of DNA sequences. Our study shows that the symbiosis has a single African origin and that secondary domestication of other fungi or reversal of mutualistic fungi to a free-living state has not occurred. Host switch
National Academy of Sciences.
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12. Identification and Functional Characterization of a Xenorhabdus nematophila Oligopeptide Permease
The bacterium Xenorhabdus nematophila is a mutualist of Steinernema carpocapsae nematodes and a pathogen of insects. Presently, it is not known what nutrients the bacterium uses to thrive in these host environments. In other symbiotic bacteria, oligopeptide permeases have been shown to be important in host interactions, and we therefore sought to determine i
American Society for Microbiology.