Plant Chloroplasts
Mostrando 1-12 de 334 artigos, teses e dissertações.
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1. A Young Seedling Stripe2 phenotype in rice is caused by mutation of a chloroplast-localized nucleoside diphosphate kinase 2 required for chloroplast biogenesis
Abstract Chloroplast development and chlorophyll (Chl) biosynthesis in plants are regulated by many genes, but the underlying molecular mechanisms remain largely elusive. We isolated a rice mutant named yss2 (young seedling stripe2) with a striated seedling phenotype beginning from leaf 2 of delayed plant growth. The mutant developed normal green leaves from
Genet. Mol. Biol.. Publicado em: 31/08/2017
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2. Salt stress affects mRNA editing in soybean chloroplasts
Abstract Soybean, a crop known by its economic and nutritional importance, has been the subject of several studies that assess the impact and the effective plant responses to abiotic stresses. Salt stress is one of the main environmental stresses and negatively impacts crop growth and yield. In this work, the RNA editing process in the chloroplast of soybean
Genet. Mol. Biol.. Publicado em: 02/03/2017
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3. Rootstocks induce contrasting photosynthetic responses of orange plants to low night temperature without affecting the antioxidant metabolism
Low temperatures negatively impact the metabolism of orange trees, and the extent of damage can be influenced by the rootstock. We evaluated the effects of low nocturnal temperatures on Valencia orange scions grafted on Rangpur lime or Swingle citrumelo rootstocks. We exposed six-month-old plants to night temperatures of 20ºC and 8ºC under controlled condi
Theor. Exp. Plant Physiol.. Publicado em: 2013
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4. Plant responses to stresses: role of ascorbate peroxidase in the antioxidant protection
When plants are exposed to stressful environmental conditions, the production of Reactive Oxygen Species (ROS) increases and can cause significant damage to the cells. Antioxidant defenses, which can detoxify ROS, are present in plants. A major hydrogen peroxide detoxifying system in plant cells is the ascorbate-glutathione cycle, in which, ascorbate peroxid
Genet. Mol. Biol.. Publicado em: 2012
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5. Identificação de interatores putativos envolvidos na localização de proteínas de duplo direcionamento em Arabidopsis thaliana / Identification of putative interactors involved in the localization of dual-targeted proteins in Arabidopsis thaliana
Most organellar proteins are nuclear encoded, synthesized in the cytosol and then targeted to their destination. Specific subcellular targeting is conducted by a complex machinery for the specific localization of the proteins, which includes targeting sequences, cytosolic proteins and specific organelar receptors. However, little is known about the process t
Publicado em: 2011
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6. Estudo do direcionamento das proteases FtsH plastidiais às membranas dos tilacóides / Study of plastidial FtsH proteases targeting to thylakoid membranes
O complexo FtsH em Arabidopsis, presente nos tilacóides, é formado pelas subunidades FtsH1/FtsH5 (tipo A) e FtsH2/FtsH8 (tipo B). Os tipos A e B apresentam grande identidade em seus domínios maduros, porém nenhuma similaridade é observada na região amino-terminal do peptídeo de trânsito. Em um experimento de importação em cloroplastos isolados, Fts
Publicado em: 2011
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7. Consequências da expressão constitutiva do gene Lhcb1*2 de Pisum sativum em plantas de Nicotiana tabacum: impactos no proteoma foliar, montagem dos fotossistemas e influência no desenvolvimento vegetal / Consequences of constitutive expression og Lhcb1*2 gene of Pisum sativum in Nicotiana tabacum plants: Impact of leaves proteomics, assembly of photosystem and influence of plant development
O complexo coletor de luz (LHC) do fotossistema II (PSII) é o principal complexo de proteínas associado a pigmentos situado na membrana dos tilacóides de cloroplastos em plantas. O LHCII funciona como uma antena de transferência de energia para a captura e direcionamento da energia luminosa do PSII para o PSI. A ação coordenada dos dois fotossistemas c
Publicado em: 2010
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8. Autotetraploidy induction and identification in banana (Musa spp.) / INDUÃÃO E IDENTIFICAÃÃO DE POLIPLOIDIA EM Musa acuminata, Colla
The aimed study to induct and to identify polyploidys identification through stomatal analysis, chromosome counting and flow cytometry, as well polyploidys and mixoploids effects on the structural and ultrastructural characteristics in banana varieties: Malbut, Ouro, Lidi e Thong Dok Mak. In polyploidys induction, explants were treated with concentrations of
Publicado em: 2008
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9. Phytochemistry of Raputia praetermissa (Rutaceae) and search for candidates of herbicides inhibitors of photosysnthesis from natural products / Fitoquímica de Raputia praetermissa (Rutaceae) e busca por candidatos a herbicidas inibidores da fotossíntese a partir de produtos naturais
The species R. praetermissa is native from Amazonia. Plant recently classified, it does not give biological and/or chemical in the literature. This fact has led to this study, which can lead to the correct chemosystematic positioning of the genus within the family Rutaceae. From the phytochemical study of the roots of R. praetermissa concluded in 2005, mainl
Publicado em: 2008
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10. Mecanismo de defesa e recuperação da fotossintese em Centrolobium tomentosum sob condições de estresse induzido por SO2 / Mechanism of defense and recovery of photosynthesis in Centrolobium tomentosum under conditions of stress induced by SO2
Large quantities of gaseous pollutants emited by urban-industrial areas emit contribute to the degradation of ecosystems with subsequent declines in vegetation. The photosynthesis is one of the first processes altered by the action of these pollutants and sulphur dioxide (SO2), as one of the most common and harmful air pollutants, drastically affect the phot
Publicado em: 2008
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11. Estudo bioquimico e da estrutura foliar de plantulas do jatoba da mata (Hymenaea courbaril L.) e do cerrado (Hymenaea stigonocarpa Mart.) expostas a concentração elevada de C O IND. 2 / Structural and biochemical study of leaves of jatobas Hymenaea coutbaril L. and H. stigonocarpa Mart. exposed to elevated concentrations of carbon dioxide atmosphere
The atmospheric concentration of carbon dioxide (CO2) increased from 280 ppm, during the Industrial Revolution period, to about 370 ppm in the nowadays. It is continuing to increase about 1.8 ppm per year. The effect of this rise in CO2, which is leading to global warming have attracted considerable attention, generating reports on how these changes can affe
Publicado em: 2007
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12. Isolation and intracellular localization of insulin-like proteins from leaves of Bauhinia variegata
Evidence based on immunological cross-reactivity and anti-diabetic properties has suggested the presence of insulin-like peptides in plants. The objective of the present study was to investigate the presence of insulin-like proteins in the leaves of Bauhinia variegata ("pata-de-vaca", "mororó"), a plant widely utilized in popular medicine as an anti-diabeti
Brazilian Journal of Medical and Biological Research. Publicado em: 2006-11