Fitness Costs
Mostrando 13-24 de 54 artigos, teses e dissertações.
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13. Resistance induced in bean plants (Phaseolus vulgaris) by acibenzolar-S-methyl and Bacillus cereus: physiological and biochemical aspects, growth and production parameters / Indução de resistência em feijoeiro (Phaseolus vulgaris) por acibenzolar-S-metil e Bacillus cereus: aspectos fisiológicos, bioquímicos e parâmetros de crescimento e produção"
The induction of systemic resistance involves the activation of latent resistance mechanisms in plants against pathogens in response to the treatment with biotic or abiotic agents. The plants present latent defense system that can be activated with the goal of saving energy. Thus, the induced resistance under natural conditions will represent cost only in th
Publicado em: 2007
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14. Abordagem evolutiva para o planejamento multi-periodo da expansão da rede de acesso aos serviços de telecomunicações
After privatization, the telecommunication area has been experienced big technological changes. From the user point of view, this means access to more modern services. For the service providers, the privatization means competition. The service providers need an optimized business plan to increase their market share, so that they can maximize their revenue an
Publicado em: 2005
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15. Modelo de inclusão digital para construção do conhecimento em qualidade de vida e atividade fisica
Digital inclusion has been the perspective to become an important tool for the knowledge construction and life quality improvement. The scope of this work was the promotion of the digital inclusion experiment into a group of graduated people in physiotherapy, with the thematic "Physical activity and life quality". Therefore it was necessary, the development
Publicado em: 2004
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16. The costs of egg production and incubation in great tits (Parus major).
The costs of egg production and incubation may have a crucial effect on avian reproductive decisions, such as clutch size and the timing of reproduction. We carried out a brood-size enlargement experiment on the great tit (Parus major), in which the birds had to lay and incubate extra eggs (full costs), only incubate extra eggs (free eggs) or did not pay any
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17. The Indirect Benefits of Mating with Attractive Males Outweigh the Direct Costs
The fitness consequences of mate choice are a source of ongoing debate in evolutionary biology. Recent theory predicts that indirect benefits of female choice due to offspring inheriting superior genes are likely to be negated when there are direct costs associated with choice, including any costs of mating with attractive males. To estimate the fitness cons
Public Library of Science.
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18. Cost minimization by helpers in cooperative vertebrates
When parents invest heavily in reproduction they commonly suffer significant energetic costs. Parents reduce the long-term fitness implications of these costs through increased foraging and reduced reproductive investment in the future. Similar behavioral modifications might be expected among helpers in societies of cooperative vertebrates, in which helping
The National Academy of Sciences.
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19. The fitness costs to plants of resistance to pathogens
A new study has shown that a gene giving resistance to pathogens imposes a cost on the fitness in Arabidopsis. This raises questions about how generally the results apply and how such costs are controlled in plants carrying resistance genes to several different pathogens.
BioMed Central.
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20. Constitutive and inducible trypsin proteinase inhibitor production incurs large fitness costs in Nicotiana attenuata
Plant trypsin proteinase inhibitors (TPIs) are potent herbivore- and jasmonate (JA)-induced defenses, but support for the commonly invoked explanation for their inducible expression, namely their associated fitness costs, has been elusive. To determine whether the expression of TPIs incurs fitness costs, we expressed 175 bp of the seven-domain pi from Nicoti
National Academy of Sciences.
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21. Frequency of Bacteriocin Resistance Development and Associated Fitness Costs in Listeria monocytogenes
Bacteriocin-producing starter cultures have been suggested as natural food preservatives; however, development of resistance in the target organism is a major concern. We investigated the development of resistance in Listeria monocytogenes to the two major bacteriocins pediocin PA-1 and nisin A, with a focus on the variations between strains and the influenc
American Society for Microbiology.
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22. Fitness benefits of trypsin proteinase inhibitor expression in Nicotiana attenuata are greater than their costs when plants are attacked.
BioMed Central.
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23. Fitness Costs Limit Viral Escape from Cytotoxic T Lymphocytes at a Structurally Constrained Epitope
The intense selection pressure exerted by virus-specific cytotoxic T lymphocytes (CTL) on replicating human immunodeficiency virus and simian immunodeficiency virus results in the accumulation of CTL epitope mutations. It has been assumed that fitness costs can limit the evolution of CTL epitope mutations. However, only a limited number of studies have caref
American Society for Microbiology.
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24. Analysis of Mupirocin Resistance and Fitness in Staphylococcus aureus by Molecular Genetic and Structural Modeling Techniques
Chromosomal resistance to mupirocin in clinical isolates of Staphylococcus aureus arises from V588F or V631F mutations in isoleucyl-tRNA synthetase (IRS). Whether these are the only IRS mutations that confer mupirocin resistance or simply those that survive in the clinic is unknown. Mupirocin-resistant mutants of S. aureus 8325-4 were therefore generated to
American Society for Microbiology.