Xylem
Mostrando 37-48 de 507 artigos, teses e dissertações.
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37. Survey of glycine-rich proteins (GRPs) in the Eucalyptus expressed sequence tag database
The occurrence of quasi-repetitive glycine-rich peptides has been reported in different organisms. Glycine-rich regions are proposed to be involved in protein-protein interactions in some mammalian protein families. In plants, a set of glycine-rich proteins (GRPs) was characterized several years ago, and since then a wealth of new GRPs have been identified.
Publicado em: 2010
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38. Transpiration and water use efficiency in clonal 4 years-old Eucalyptus trees in irrigated and no irrigated areas in Eunápolis, Bahia / Transpiração e eficiência do uso da água em árvores clonais de Eucalyptus aos 4 anos em áreas com e sem irrigação em Eunápolis, Bahia
Conhecer o uso da água pelas árvores é fundamental para entender as interações entre o ambiente e as florestas e compreender seu crescimento por meio do entendimento dos processos que o governa. Objetivou-se com o trabalho determinar as taxas de transpiração, o crescimento e a eficiência do uso da água de árvores de Eucalyptus, por meio do método
Publicado em: 2010
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39. O papel ecológico da neblina e a absorção foliar de água em três espécies lenhosas de Matas Nebulares, SP - Brasil / The ecological role of fog and foliar water uptake in three woody species from Southeastern Brazilian Cloud Forest
Fog deposition is an important water source in several terrestrial ecosystems. Fog water intercepted by the plants can run off to the soil or be absorbed by the leaves. However, very little is known about the ecological role of fog and the mechanisms and structures involved in foliar water uptake by woody species in tropical environments. In this context, we
Publicado em: 2010
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40. Translocation of the insecticide thiamethoxam in the phloem of castor bean and coffee plants. / TranslocaÃÃo do inseticida tiametoxam no floema de mamoneira e cafeeiro.
It was aimed in this work to investigate the translocation of thiamethoxam in the phloem of castor bean plant, used as model plant, the influence of adjuvants on the penetration of this insecticide in the leaves of this plant and its translocation in the phloem of coffee plant. Castor bean plants with three weeks of age, growing in nutrient solution and coff
Publicado em: 2009
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41. Xylem and hydraulic properties of Caryocar brasiliense CAMB. (pequi) on diferent environment / âXilema e propriedades hidrÃulicas de plantas de Caryocar brasiliense camb. (Pequi) em diferentes ambientes.â
A Ãgua à um fator capaz de definir a produÃÃo e distribuiÃÃo das espÃcies no ambiente natural. Muitas espÃcies se adapatam a diferentes condiÃÃes de disponibilidade hÃdrica por ajustes estuturais e funcionais. Esse estudo teve como objetivo avaliar a existÃncia de plasticidade na anatomia do xilema e propriedades hidrÃulicas de plantas da espÃc
Publicado em: 2009
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42. Ecological wood anatomy and cambial activity of Roupala rhombifolia (Proteaceae) in Serra do Cipó (MG) / Anatomia ecológica do lenho e atividade cambial de Roupala rhombifolia (Proteaceae) na Serra do Cipó (MG)
The intensity of environmental variations is smaller on tropical than temperate regions. Therefore, tropical species were considered for years as evergrowing. In addition, environmental variations can exist in small and big scales and species should respond differently depending on each environmental stimulus. By these reasons, the aim of the study was to an
Publicado em: 2009
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43. Anatomia foliar de espécies de Aspleniaceae e Polypodiaceae (Monilófitas) ocorrentes no Parque Estadual da Serra do Brigadeiro, MG, Brasil / Leaf anatomy of Aspleniaceae and Polypodiaceae (Monilophytes) species occurring in the Parque Estadual da Serra do Brigadeiro, MG, Brazil
Pteridophyta is a term used to denominate vascular plants lacking seeds that are dispersed by spores, with a life cycle characterized by two distinct phases: a gametophytic and a sporophytic phase. There are approximately12, 240 fern species displaying great diversity in wet tropical regions. In Brazil, 1,200 to 1,300 species are estimated to exist, with at
Publicado em: 2009
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44. Early colonization pattern of maize (Zea mays L. Poales, Poaceae) roots by Herbaspirillum seropedicae (Burkholderiales, Oxalobacteraceae)
The bacterium Herbaspirillum seropedicae is an endophytic diazotroph found in several plants, including economically important poaceous species. However, the mechanisms involved in the interaction between H. seropedicae and these plants are not completely characterized. We investigated the attachment of Herbaspirillum to maize roots and the invasion of the r
Genetics and Molecular Biology. Publicado em: 03/09/2008
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45. TRANSPORTE E HOMEOSTASE Na+/K+ SOB CONDIÃÃES DE SODICIDADE EM FEIJÃO CAUPI / Na+ and K+ transport and homeostasis under sodicity conditions in cowpea
High soil salinity can be associated with K+ starvation enabling interactive stresses on plant nutrition that impair crop production. The transport mechanisms on the soil-root symplast-xylem boundaries are crucial to the establishment of Na+ toxicity under salt stress, especially under low K+ availability. Then, the aim of this work was the physiological cha
Publicado em: 2008
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46. Estimativas de parâmetros genéticos para caracteres de cenoura em sistemas de cultivo agroecológico
The aim of the present work was to estimate genetic parameters that provide the definition of a breeding strategy, looking for the development of new varieties of carrot adapted to the conditions of Distrito Federal agroecologic cultivation. Considering data from tests in areas of agroecologic cultivation (Natural Agriculture - AN and Organic Agriculture - A
Publicado em: 2008
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47. Estudos sobre o bloqueio do xilema na pós-colheita das inflorescências de ave-do-paraíso (Strelitzia reginae Aiton) / Studies on the blockage of the xylem in the post-harvest of the bird-of-paradise inflorescences (Strelitzia reginae Aiton)
A Strelitzia reginae Aiton é popularmente conhecida como ave-do-paraíso e devido ao seu amplo uso como flor de corte ainda são poucos os estudos realizados na avaliação dos problemas ocorridos em sua pós-colheita. Com o objetivo de avaliar a oclusão vascular ocorrida no local cortado dos escapos florais, soluções pós-colheita contendo inibidores da
Publicado em: 2008
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48. ESTUDO ANATÔMICO DO LENHO E DESCRIÇÃO MORFOLÓGICA DE CINCO ESPÉCIES SUL-RIO-GRANDENSES DA FAMÍLIA RHAMNACEAE / WOOD ANATOMICAL STUDY AND MORPHOLOGIC DESCRIPTION OF FIVE SPECIES SUL-RIO-GRANDENSES OF THE RHAMNACEAE FAMILY
A família Rhamnaceae é pouco representada no Brasil e escassamente conhecida no tocante à estrutura anatômica da madeira. Compreende espécies com extraordinária diversidade de hábito e aspectos morfológicos com tendência ao xeromorfismo. O presente estudo teve por objetivo investigar a anatomia do lenho, além de fornecer a descrição morfológica
Publicado em: 2008