Nutrients Translocation
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Influência da desnutrição energético-protéica no processo de translocação bacteriana em modelo experimental de obstrução intestinal em ratos
Malnutrition, highly prevalent in developing countries, is an old suffering that afflicts the humanity. The protein-energy malnutrition is presented as a state of food deficiency, with deficit in proteins and calories, provoking lower supplying of nutrients to the cells. Some studies have shown evidences of interaction between malnutrition and bacterial tran
Publicado em: 2005
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14. Diversidade genÃtica de isolados de Spiroplasma kunkelii e reaÃÃes em genÃtipos de milho / Genetic Diversity of Spiroplasma kunkelii strains and their reactions in maize genotypes
The microorganism Spiroplasma kunkelii causes the Corn Stunt Disease. The study of the pathogen and the characterization of its genetic variability is important to stablish a breeding program for resistance. The objectives of this study were to analyze the genetic diversity between geographical strains of S. kunkelii and their reaction in different maize gen
Publicado em: 2005
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15. Inhibition of endotoxin-induced bacterial translocation in mice.
The primary functions of the gut are to absorb nutrients and exclude bacteria and their products. However, under certain circumstances the gut may lose its barrier function and serve as a reservoir for systemic microbial infections. These experiments were performed to determine the mechanisms whereby endotoxin causes bacteria to escape (translocate) from the
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16. Effect of total parenteral nutrition plus morphine on bacterial translocation in rats.
OBJECTIVE: This study tested the hypothesis that gut stasis induced by parenteral morphine sulfate (MS) leads to enhanced bacterial translocation in rats on total parenteral nutrition (TPN). SUMMARY BACKGROUND DATA: TPN and MS are common adjuncts in the care of critically ill patients. TPN is known to provoke a variable degree of translocation. MS induces gu
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17. Endocytosis and degradation of BOR1, a boron transporter of Arabidopsis thaliana, regulated by boron availability
Boron (B) is essential for plants but toxic when present in excess. Arabidopsis thaliana BOR1 is a B exporter for xylem loading and is essential for efficient B translocation from roots to shoots under B limitation. B translocation to shoots was enhanced under B limitation in WT but not in bor1-1 mutant plants. The enhanced translocation was suppressed upon
National Academy of Sciences.
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18. Life-history strategies affect aphid preference for yellowing leaves
According to the nutrient-translocation hypothesis, yellowing tree leaves are colonized by aphids at the end of the growing season owing to improved availability of nutrients in the phloem sap after chlorophyll degradation. We measured aphid densities on potted Betula pendula seedlings in a field site where a small proportion of foliage rapidly turned yellow
The Royal Society.
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19. Twenty-Four-Hour Induction of Freezing and Drought Tolerance in Plumules of Winter Rye Seedlings by Desiccation Stress at Room Temperature in the Dark 1
Exposure of seedlings of winter rye (Secale cereale L., cv. Puma) for 2 weeks or 24 hours to desiccation stress (40% relative humidity) at room temperature (21°C) in the dark induced degrees of freezing and drought tolerance in the plumules comparable to those produced by cold conditioning for 2 weeks at 3°C. The induction was associated with repression of
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20. Phylogenetic Relationships within Cation Transporter Families of Arabidopsis1
Uptake and translocation of cationic nutrients play essential roles in physiological processes including plant growth, nutrition, signal transduction, and development. Approximately 5% of the Arabidopsis genome appears to encode membrane transport proteins. These proteins are classified in 46 unique families containing approximately 880 members. In addition,
American Society of Plant Physiologists.
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21. Phloem-Localizing Sulfate Transporter, Sultr1;3, Mediates Re-Distribution of Sulfur from Source to Sink Organs in Arabidopsis1
For the effective recycling of nutrients, vascular plants transport pooled inorganic ions and metabolites through the sieve tube. A novel sulfate transporter gene, Sultr1;3, was identified as an essential member contributing to this process for redistribution of sulfur source in Arabidopsis. Sultr1;3 belonged to the family of high-affinity sulfate transporte
American Society of Plant Biologists.
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22. Activation of the RAS/Cyclic AMP Pathway Suppresses a TOR Deficiency in Yeast
The TOR (target of rapamycin) and RAS/cyclic AMP (cAMP) signaling pathways are the two major pathways controlling cell growth in response to nutrients in yeast. In this study we examine the functional interaction between TOR and the RAS/cAMP pathway. First, activation of the RAS/cAMP signaling pathway confers pronounced resistance to rapamycin. Second, const
American Society for Microbiology.
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23. An Endoplasmic Reticulum-Bound Ca2+/Mn2+ Pump, ECA1, Supports Plant Growth and Confers Tolerance to Mn2+ Stress1
Plants can grow in soils containing highly variable amounts of mineral nutrients, like Ca2+ and Mn2+, though the mechanisms of adaptation are poorly understood. Here, we report the first genetic study to determine in vivo functions of a Ca2+ pump in plants. Homozygous mutants of Arabidopsis harboring a T-DNA disruption in ECA1 showed a 4-fold reduction in en
American Society of Plant Physiologists.
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24. Long-Distance Water Transport in Aquatic Plants.
Acropetal mass flow of water is demonstrated in two submerged angiosperms, Lobelia dortmanna L. and Sparganium emersum Rehman by means of guttation measurements. Transpiration is absent in truly submerged plants, but the presence of guttation verifies that long-distance water transport takes place. Use of tritiated water showed that the water current arises