Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 7
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A role for auxin redistribution in the responses of the root system architecture to phosphate starvation in Arabidopsis Inra
Nacry, P.; Canivenc, G.; Muller, B.; Azim, A.; Van Onckelen, H.; Rossignol, M.; Doumas, P..
The changes in root system architecture (RSA) triggered by phosphate (P) deprivation were studied in Arabidopsis (Arabidopsis thaliana) plants grown for 14 d on 1 mM or 3 mM P. Two different temporal phases were observed in the response of RSA to low P. First, lateral root (LR) development was promoted between days 7 and 11 after germination, but, after day 11, all root growth parameters were negatively affected, leading to a general reduction of primary root ( PR) and LR lengths and of LR density. Low P availability had contrasting effects on various stages of LR development, with a marked inhibition of primordia initiation but a strong stimulation of activation of the initiated primordia. The involvement of auxin signaling in these morphological changes...
Tipo: Journal Article Palavras-chave: CARENCE EN PHOSPHATE; CROISSANCE RACINAIRE; CONTROLE HORMONAL; MORPHOLOGIE RACINAIRE PHOSPHORUS DEFICIENCY.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007df2073ce&uri=/notices/prodinra1/2007/02/
Imagem não selecionada

Imprime registro no formato completo
Arabidopsis plants acclimate to water deficit at low cost through changes of carbon usage: an integrated perspective using growth, metabolite, enzyme, and gene expression analysis Inra
Hummel, I.; Pantin, F.; Sulpice, R.; Piques, M.; Rolland, G.; Dauzat, M.; Christophe, A.; Pervent, M.; Bouteillé, M.; Stitt, M.; Gibon, Y.; Muller, B..
Growth and carbon (C) fluxes are severely altered in plants exposed to soil water deficit. Correspondingly, it has been suggested that plants under water deficit suffer from C shortage. In this study, we test this hypothesis in Arabidopsis (Arabidopsis thaliana) by providing an overview of the responses of growth, C balance, metabolites, enzymes of the central metabolism, and a set of sugar-responsive genes to a sustained soil water deficit. The results show that under drought, rosette relative expansion rate is decreased more than photosynthesis, leading to a more positive C balance, while root growth is promoted. Several soluble metabolites accumulate in response to soil water deficit, with K+ and organic acids as the main contributors to osmotic...
Tipo: Journal Article Palavras-chave:  .
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010b164e296&uri=/notices/prodinra1/2010/12/
Imagem não selecionada

Imprime registro no formato completo
Association of specific expansins with longitudinal and lateral expansion in maize leaves is maintained under environmental, genetic and developmental sources of variation Inra
Muller, B.; Bourdais, G.; Reidy, B.; Bencivenni, C.; Massonneau, A.; Condamine, P.; Rolland, G.; Conejero, G.; Rogowsky, P.; Tardieu, F..
We aimed to evaluate whether changes in maize (Zea mays) leaf expansion rate in response to environmental stimuli or developmental gradients are mediated by common or specific expansins, a class of proteins known to enhance cell wall extensibility. Among the 33 maize expansin or putative expansin genes analyzed, 19 were preferentially expressed at some point of the leaf elongation zone and these expansins could be organized into three clusters related to cell division, maximal leaf expansion, and cell wall differentiation. Further analysis of the spatial distribution of expression was carried out for three expansins in leaves displaying a large range of expansion rates due to water deficit, genotype, and leaf developmental stage. With most sources of...
Tipo: Journal Article Palavras-chave: CROISSANCE FOLIAIRE; EXPANSINE.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20088e3add59&uri=/notices/prodinra1/2008/10/
Imagem não selecionada

Imprime registro no formato completo
Control of leaf expansion: a developmental switch from metabolics to hydraulics Inra
Pantin, F.; Simonneau, T.; Rolland, G.; Dauzat, M.; Muller, B..
Leaf expansion is the central process by which plants colonize space, allowing energy capture and carbon acquisition. Water and carbon emerge as main limiting factors of leaf expansion, but the literature remains controversial about their respective contributions. Here, we tested the hypothesis that the importance of hydraulics and metabolics is organized according to both dark/light fluctuations and leaf ontogeny. For this purpose, we established the developmental pattern of individual leaf expansion during days and nights in the model plant Arabidopsis (Arabidopsis thaliana). Under control conditions, decreases in leaf expansion were observed at night immediately after emergence, when starch reserves were lowest. These nocturnal decreases were strongly...
Tipo: Journal Article Palavras-chave: TURGESCENCE; LUMIERE.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011995a4e3b&uri=/notices/prodinra1/2011/06/
Imagem não selecionada

Imprime registro no formato completo
From taxonomic literature to cybertaxonomic content Naturalis
Miller, J.A.; Dikow, T.; Agosti, D.; Sautter, G.; Catapano, T.; Penev, L.; Zhang, Z.-Q.; Pentcheff, D.; Pyle, R.; Blum, S.; Parr, C.; Freeland, C.; Garnett, T.; Ford, L.S.; Muller, B.; Smith, L.; Strader, G.; Georgiev, T.; Bénichou, L..
Taxonomy is a fundamental science that provides the scaffolding for biology. But the true value of taxonomic data remains unrealized because basic biodiversity information remains fragmented and unevenly accessible. Taxonomy helps us recognize species and map their distributions by generating text descriptions, images, and records of when and where they have been observed. Current rates of species extinction, habitat loss, and climate change mean that taxonomy has never been more relevant. Biodiversity is one of the most information-rich fields of human knowledge, but advances in basic cybertaxonomic infrastructure have only recently provided the tools to organize biodiversity information in ways that respond to a wide range of user groups, including...
Tipo: Article / Letter to the editor Palavras-chave: Cybertaxonomy; Open access publishing; Semantic content; XML markup; 42.70; 54.84.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/434476
Imagem não selecionada

Imprime registro no formato completo
Leaf growth rate per unit thermal time follows QTL-dependent daily patterns in hundreds of maize lines under naturally fluctuating conditions Inra
Sadok, W.; Naudin, P.; Boussuge, B.; Muller, B.; Welcker, C.; Tardieu, F..
We have analysed daily patterns of leaf elongation rate (LER) in large data sets with 318 genotypes placed in naturally fluctuating temperature and evaporative demand, and examined the effect of targeted alleles on these patterns. The method consisted, firstly, in expressing elongation rate per unit thermal time, so it became temperature independent; secondly, in a joint analysis of diurnal fluctuations of elongation rate and of micrometeorological conditions in several experiments, and finally, in a comparison of daily patterns between groups of genotypes possessing targeted alleles. (1) Conditions for using thermal time at a time step of 15 min were first tested successfully in 318 recombinant inbred lines (RILs) of three mapping populations. (2) An...
Tipo: Journal Article Palavras-chave: CROISSANCE FOLIAIRE EVAPORATIVE DEMAND; PHENOTYPING; TIME COURSE.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008f59625de&uri=/notices/prodinra1/2008/10/
Imagem não selecionada

Imprime registro no formato completo
Water deficits uncouple growth from photosynthesis, increase C content, and modify the relationships between C and growth in sink organs Inra
Muller, B.; Pantin, F.; Génard, M.; Turc, O.; Freixes, S.; Piques, M.; Gibon, Y..
In plants, carbon (C) molecules provide building blocks for biomass production, fuel for energy, and exert signalling roles to shape development and metabolism. Accordingly, plant growth is well correlated with light interception and energy conversion through photosynthesis. Because water deficits close stomata and thus reduce C entry, it has been hypothesised that droughted plants are under C starvation and their growth under C limitation. In this review, these points are questioned by combining literature review with experimental and modelling illustrations in various plant organs and species. First, converging evidence is gathered from the literature that water deficit generally increases C concentration in plant organs. The hypothesis is raised that...
Tipo: Journal Article Palavras-chave: C METABOLISM; C SIGNALLING; GROWTH; MODEL; SINK LIMITATION; SOURCE LIMITATION; STARCH; SUGAR; WATER DEFICIT.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201178b31f14&uri=/notices/prodinra1/2011/06/
Registros recuperados: 7
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional