Crassulacean Acid Metabolism
Mostrando 1-12 de 122 artigos, teses e dissertações.
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1. Tissue culture of ornamental cacti
Cacti species are plants that are well adapted to growing in arid and semiarid regions where the main problem is water availability. Cacti have developed a series of adaptations to cope with water scarcity, such as reduced leaf surface via morphological modifications including spines, cereous cuticles, extended root systems and stem tissue modifications to i
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-12
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2. Micronutrients affecting leaf biochemical responses during pineapple development
An adequate mineral nutrition is essential for the development and productivity of pineapple. However, little is known about the nutritional and metabolic changes that occur in this crop in response to micronutrient deficiency or excess, particularly on tropical conditions. Thus, the objective of this study was to evaluate the application effects of micronut
Theor. Exp. Plant Physiol.. Publicado em: 2013
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3. Sinalização da indução do metabolismo ácido das crassuláceas (CAM) por ácido abscísico e óxido nítrico em Guzmania monostachia (Bromeliaceae) / Abscisic acid and nitric oxide signaling on the induction of crassulacean acid metabolism in Guzmania monostachia (Bromeliaceae)
Guzmania monostachia é uma bromélia tanque epífita C3-CAM facultativa, constituindo-se em um modelo muito interessante para estudar a sinalização que ocorre na transição da fotossíntese C3 para CAM. Baseado em resultados obtidos pelo Laboratório de Fisiologia Vegetal do IBUSP, constatou-se que a mudança em questão se dá de forma diferente ao long
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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4. VARIAÇÃO NA COMPOSIÇÃO ISOTÓPICA DO CARBONO E NITROGÊNIO DA MATÉRIA ORGÂNICA E BIOMASSA DA COROA FOLIAR DE AECHMEA AQUILEGA (SALISB.) GRISEB BROMELIACEAE EM CAATINGA, AGRESTE E MATA ATLÂNTICA DE SERGIPE. / CHANGE IN COMPOSITION OF CARBON AND NITROGEN ISOTOPE OF ORGANIC MATTER AND BIOMASS LEAF CROWN AECHMEA AQUILEGA (SALISB.) GRISEB BROMELIACEAE CAATINGA IN, THE ATLANTIC AND AGRESTE SERGIPE.
Estudos isotópicos para determinar os valores dos isótopos do carbono foliar mostram que estes variam -10 a -28 do padrão PDB. Este estudo analisou a composição isotópica do Carbono e Nitrogênio foliar e a matéria orgânica acumulada na coroa foliar de Aechmea aquilega de três habitats: Caatinga (Poço Verde), Mata Atlântica (Pirambu) e em um área
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2011
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5. Hormonal and nitric oxide signalling in the induction of the Crassulacean acid metabolismo in Ananas comosus / Sinalização hormonal e do óxido nítrico na indução do metabolismo ácido crassuláceo em Ananas comosus
A expressão do metabolismo ácido crassuláceo (CAM) nas plantas C3-CAM facultativas pode ser fortemente modulada por uma variedade de sinais ambientais e endógenos. Visto que plantas de abacaxizeiro (Ananas comosus, variedade Smooth Cayenne) podem apresentar comportamento fotossintético do tipo C3 ou CAM quando cultivadas in vitro, o presente trabalho bu
Publicado em: 2008
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6. Ecologia da vegetação de afloramentos rochosos do litoral da região Sudeste
Ecological aspects of the vegetation that grows in the rock outcrops from the seashore of southeastern Brazil are almost unknown. Due to the absence or the shalowness of the soil, so typical of this habitat, the vegetation is subjected to a strong water defieit during the interval between showers. The floristic composition. the structure of these communities
Publicado em: 1990
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7. Variation in the Carbon Isotope Composition of a Plant with Crassulacean Acid Metabolism
The content of 13C varies in plants with Crassulacean acid metabolism. Differences up to 3.5‰ in the 13C/12C ratios were observed between leaves of different age in the same plant of Bryophyllum daigremontianum. Soluble and insoluble carbon in the same leaf differed up to 8‰, the largest difference occurring in the leaves with the highest Crassulacean ac
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8. 13C/12C Ratio Changes in Crassulacean Acid Metabolism Plants 1
13C/12C ratios have been found in totally combusted leaves of Crassulacean acid metabolism plants to range from −14 to −33 δ 13C‰ compared with a limestone standard. Crassulacean acid metabolism plants apparently utilize both ribulose-1, 5-diphosphate carboxylase and phosphoenolpyruvate carboxylase to assimilate atmospheric CO2 and, depending on envir
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9. Effects of Osmotic Gradients on Vacuolar Malic Acid Storage: A Basic Principle in Oscillatory Behavior of Crassulacean Acid Metabolism 1
Malate synthesis by CO2 dark fixation and malate accumulation in the vacuoles of leaf slices of Kalanchoë daigremontiana Hamet et Perrier, a plant performing crassulacean acid metabolism, occurs only in external solutions where the osmotic pressure difference between the cells and the medium is low. Conversely, malate loss from the vacuoles depends on a hig
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10. Histochemical Compartmentation of Photosynthesis in the Crassulacean Acid Metabolism Plant Crassula falcata1
The succulent leaf of the obligate Crassulacean acid metabolism plant Crassula falcata comprises two distinct types of parenchyma. The peripheral tissue is dark green, whereas the central tissue is relatively colorless. We have investigated whether the conventional interpretation of Crassulacean acid metabolism—simply, temporal separation of light and dark
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11. Intracellular Localization of Some Key Enzymes of Crassulacean Acid Metabolism in Sedum praealtum1
The intracellular locations of six key enzymes of Crassulacean acid metabolism were determined using enzymically isolated mesophyll protoplasts of Sedum praealtum D.C. Data from isopycnic sucrose density gradient centrifugation established the chloroplastic location of pyruvate Pi dikinase, the mitochondrial location of NAD-linked malic enzyme, and exclusive
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12. Effects of Light Quantity and Quality on the Decarboxylation of Malic Acid in Crassulacean Acid Metabolism Photosynthesis 1
The rate of malic acid consumption in the Crassulacean acid metabolism (CAM) plant Kalanchoë daigremontiana Hamet et Perrier was found to be more rapid than the rate of photosynthetic oxygen evolution under all levels of irradiation by white light. This accounts for the accumulation of carbon dioxide in CAM tissues in the light.