Delayed Senescence
Mostrando 1-12 de 74 artigos, teses e dissertações.
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1. Análises moleculares das vias de sinalização de morte celular originadas no retículo endoplasmático / Molecular analyses of cell death pathways signalling originated in the endoplasmic reticulum
Abiotic and biotic stresses are responsible for major losses in agricultural productivity world wise. Therefore, the understanding of mechanisms of plant stress response and adaptation to such conditions should provide the foundation for engineering plant stress tolerance and hence maximizing the yield of crops growing under adverse environmental conditions.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2010
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2. ProduÃÃo e caracterizaÃÃo do biofilme de quitosana como envoltÃrio protetor em morangos
The shrimp Litopenaeus vannamei is native of the Pacific Ocean and was introduced in the 80s in Brazil. The evolution of the performance of the Brazilian shrimp (1998-2007), increased from 7 thousand to 65 thousand ton./year. This study aimed to produce and characterize chitosan, obtained by desacetilaÃÃo of chitin from shrimp waste, to be used as a protec
Publicado em: 2009
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3. Herança da senescência retardada em milho / Inheritance of the delayed senescence trait in Maize
Information on the inheritance of traits to be selected is of paramount importance for the success of breeding programs. The trait delayed senescence, usually named "stay-green" trait, has been related to tolerance to abiotic stresses, mainly drought stress, in several crop species. Although the majority of commercial maize hybrids are "stay-green", limited
Publicado em: 2007
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4. Estresse osmótico e do retículo endoplasmático induzem morte celular programada de maneira dependente das proteínas NRPs / Osmotic- and ER-stress induce NRPs-dependent programed cell death
The identification of cell signaling pathways in response to different stresses and the interactions among these pathways have become major focus for understanding the molecular bases of plant cell-environment interactions. Recently, a novel integrative pathway between ER- and osmotic-stress has been described by our group. Among the target genes of the inte
Publicado em: 2007
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5. Maturation and conservation of murcott tangor (Citrus reticulata Blanco x C. sinensis Osbeck) and tahiti lime (Citrus latifolia Tanaka) under bioregulators action. / Maturação e conservação do Tangor Murcote (Citrus reticulata Blanco x C. sinensis Osbeck) e da lima ácida Tahiti (Citrus latifolia Tanaka) sob efeito de biorreguladores.
The experiments were conducted from August 2001 to August 2002 in the post-harvest Physiology Laboratory, Department of Biology, ESALQ-USP. It was checked the isolated effect of gibberellic acid, 1-methylcyclopropene and aminoethoxyvinilglycine, and also the combinations of 1-MCP with GA3 and AVG with GA3, on Murcott tangor and Tahiti lime post-harve
Publicado em: 2003
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6. Leaf senescence is delayed in tobacco plants expressing the maize homeobox gene knotted1 under the control of a senescence-activated promoter.
Leaf senescence is an active process involving remobilization of nutrients from senescing leaves to other parts of the plant. Whereas senescence is accompanied by a decline in leaf cytokinin content, supplemental cytokinin delays senescence. Plants that overexpress isopentenyl transferase (ipt), a cytokinin-producing gene, or knotted1 (kn1), a homeobox gene,
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7. Overproduction of Cytokinins in Petunia Flowers Transformed with PSAG12-IPT Delays Corolla Senescence and Decreases Sensitivity to Ethylene1
Plant senescence is regulated by a coordinated genetic program mediated in part by changes in ethylene, abscisic acid (ABA), and cytokinin content. Transgenic plants with delayed senescence are useful for studying interactions between these signaling mechanisms. Expression of ipt, a cytokinin biosynthetic gene from Agrobacterium tumefaciens, under the co
The American Society for Plant Biologists.
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8. Telomere Cap Components Influence the Rate of Senescence in Telomerase-Deficient Yeast Cells
Cells lacking telomerase undergo senescence, a progressive reduction in cell division that involves a cell cycle delay and culminates in “crisis,” a period when most cells become inviable. In telomerase-deficient Saccharomyces cerevisiae cells lacking components of the nonsense-mediated mRNA decay (NMD) pathway (Upf1,Upf2, or Upf3 proteins), senescence i
American Society for Microbiology.
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9. Role of Cytokinins in Carnation Flower Senescence 1
Stem and leaf tissues of carnation (Dianthus caryophyllus) plants appear to contain a natural antisenescence factor since removal of most of these tissues from cut carnation flowers hastened their senescence. However, kinetin (5-10 μg/ml) significantly delayed senescence of flowers with stem and leaf tissues removed. In addition, the life span of cut flower
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10. Cloning and Characterization of a Receptor-Like Protein Kinase Gene Associated with Senescence
Senescence-associated genes are up-regulated during plant senescence and many have been implicated in encoding enzymes involved in the metabolism of senescing tissues. Using the differential display technique, we identified a SAG in bean (Phaseolus vulgaris) leaf that was exclusively expressed during senescence and was designated senescence-associated recept
American Society of Plant Physiologists.
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11. Induced Senescence of Intact Wheat Seedlings and Its Reversibility 1
Intact wheat seedlings (Triticum aestivum L.) were induced to senesce by placing them in the dark and at various stages of senescence were placed back in the light and their recoverability observed. Seedlings demonstrated complete recovery of chlorophyll, protein, and rate of photosynthesis after 2 days in the dark, but were unable to recover fully after 4 d
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12. A Gene Encoding an Acyl Hydrolase Is Involved in Leaf Senescence in Arabidopsis
SAG101, a leaf senescence-associated gene, was cloned from an Arabidopsis leaf senescence enhancer trap line and functionally characterized. Reporter gene and RNA gel blot analyses revealed that SAG101 was not expressed until the onset of senescence in leaves. A recombinant SAG101 fusion protein overexpressed in Escherichia coli displayed acyl hydrolase acti
American Society of Plant Biologists.