V Ppase
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Plant physiology as affected by humified organic matter
Since the beginning of Human civilization, the soil organic matter has been used as plant growth promoter and/or regulator. Indeed, early in plant science history, even before the auxin concept has been established, the term "auximones" was coined to describe plant growth promoting humic acids derived from peat. Despite of this, until the end of the 20th cen
Theor. Exp. Plant Physiol.. Publicado em: 2013
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2. Efeito do Ãcido abscÃsico nas bombas de prÃtons vacuolares e enzimas antioxidantes em Vigna unguiculata (L.) Walp / Effect of abscisic acid in vacuolar proton pumps and antioxidant enzymes in Vigna unguiculata (L.) Walp
O Ãcido abscÃsico (ABA) à um fitohormÃnio que desempenha papÃis crÃticos na regulaÃÃo das respostas das plantas ao crescimento e desenvolvimento. O vacÃolo de plantas superiores à uma organela que ocupa a maior parte da cÃlula. A condiÃÃo de acidez à mantida por duas bombas de prÃtons distintas, V-ATPase e V-PPase. Sabe-se que estas bombas de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2011
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3. Estudo da expressÃo dos genes das bombas de prÃtons (V-ATPase e V-PPase) e dos contra-transportadores vacuolares (NHX) de Vigna unguiculata (L.) Walp submetidos a estresses abiÃticos / Expression study of proton pumps(V-ATPase and V-PPase) and vacuolar antiport (NHX) genes from Vigna unguiculata (L.) Walp submitted to abiotic stress
O acÃmulo de Na+ no vacÃolo central representa um importante mecanismo de defesa de plantas contra o estresse salino. A regulaÃÃo dos volumes e conteÃdos dos vacÃolos de cÃlulas vegetais depende da atividade de transportadores e canais localizados no tonoplasto (membrana vacuolar). A membrana vacuolar possui duas distintas bombas de prÃtons (V-ATPase
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2009
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4. Sistemas primários de transporte de prótons integram os mecanismos de desintoxicação do mesotrione em plantas de milho
O mesotrione é um dos mais efetivos herbicidas desenvolvidos para o controle de uma ampla gama de plantas daninhas que infestam campos de milho (Zea mays). Todavia, as bases bioquímicas e moleculares da tolerância das plantas de milho a esse herbicida ainda não foram estabelecidas. Para compreender os mecanismos de desintoxicação do mesotrione em plant
Planta Daninha. Publicado em: 2009
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5. Acúmulo e remobilização de NO3 - e eficiência de uso de nitrogênio em variedades tradicional e melhorada de arroz (Oryza sativa L.). / Accumulation and remobilization of NO3 - and efficiency in the use of nitrogen in traditional and improved varieties of rice (Oryza sativa L.).
The dynamics of accumulation and remobilization of NO3 -related protein content of the grains was studied in two varieties of rice, Piauí (traditional state of Maranhão) and IAC- 47 (enhanced by research institutions). The experiment was conducted in a greenhouse of UFRuralRJ in the period August 2006 to February 2007, with a completely randomized design w
Publicado em: 2008
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6. Studies of the kinetic characteristics of alkaline phosphatase reconstituted in vesicular systems / Estudos das características cinéticas da fosfatase alcalina reconstituída em sistemas vesiculares
Alkaline phosphatase is a multifunctional enzyme, capable of hydrolyzing phosphate monoesters, pyrophosphate, phosphodiesters, as well as catalyzing transphosphorylation reactions, and it is named "alkaline" due to its ability to perform these reactions more efficiently in pH above the neutral (pH 8-11). The aim of this work was to standardize a methodology
Publicado em: 2008
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7. Uptake and remobilization of NO3 - in rice (Oryza sativa L.): Proton pumps activity and dynamics of the process / Absorção e remobilização de NO3 - em arroz (Oryza sativa L.): Atividade das bombas de prótons e a dinâmica do processo
The nitrogen metabolism of rice (Caiapó variety) was studied under nitrate starvation in hidroponic culture. Thirty days after germination half of the plants continued to receive the nutrient solution, while the other group was maintained without solution change and monitored until the exhaustion of NO3 -. The depletion of NO3 - resulted in greater decrease
Publicado em: 2006
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8. Vacuolar H(+)-translocating pyrophosphatase is induced by anoxia or chilling in seedlings of rice.
The present study was undertaken to determine whether vacuolar H(+)-pyrophosphatase (V-PPase) might replace vacuolar H(+)-ATPase under energy stress due to anoxia or chilling in anoxia-tolerant species such as rice (Oryza sativa L.) and corn (Zea mays L.). The relative transcript level of V-PPase in rice seedlings, like that of alcohol dehydrogenase 1, incre
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9. Aminomethylenediphosphonate: A Potent Type-Specific Inhibitor of Both Plant and Phototrophic Bacterial H+-Pyrophosphatases.
The suitability of different pyrophosphate (PPi) analogs as inhibitors of the vacuolar H+-translocating inorganic pyrophosphatase (V-PPase; EC 3.6.1.1) of tonoplast vesicles isolated from etiolated hypocotyls of Vigna radiata was investigated. Five 1,1-diphosphonates and imidodiphosphate were tested for their effects on substrate hydrolysis by the V-PPase at
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10. Tris Is a Competitive Inhibitor of K+ Activation of the Vacuolar H+-Pumping Pyrophosphatase.
The effects of a range of commonly used pH buffers on the hydrolytic activity of the plant vacuolar H+-transporting inorganic pyrophosphatase (V-PPase) from mung bean (Vigna radiata L.) hypocotyls were tested. All of the buffers inhibited K+ stimulation of the V-PPase, and the degree of inhibition was dependent on the concentrations of both the buffer and K+
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11. Molecular cloning and sequence of cDNA encoding the pyrophosphate-energized vacuolar membrane proton pump of Arabidopsis thaliana.
The energy-dependent transport of solutes across the vacuolar membrane (tonoplast) of plant cells is driven by two H+ pumps: a vacuolar ("V-type") H(+)-ATPase (EC 3.6.1.3) and a H(+)-translocating (pyrophosphate-energized) inorganic pyrophosphatase (H(+)-PPase; EC 3.6.1.1). The H(+)-PPase, like the V-type H(+)-ATPase, is abundant and ubiquitous in the vacuol
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12. Chill-Induced Changes in the Activity and Abundance of the Vacuolar Proton-Pumping Pyrophosphatase from Mung Bean Hypocotyls.
Changes in the properties of extractable vacuolar H+-pumping pyrophosphatase (V-PPase) and vacuolar ATPase activities in chilling-sensitive seedlings of mung bean (Vigna radiata) were investigated. Following chilling at 4[deg]C for 48 h, both hydrolytic and proton-pumping activities of the V-PPase increased 1.5- to 2-fold over controls and remained elevated