Search results for "primer"

De la mundialización a la globofobia

2007

Tetracycline-controlled transgenic targeting from the SCL locus directs conditional expression to erythrocytes, megakaryocytes, granulocytes, and c-k…

2006

The stem cell leukemia gene SCL, also known as TAL-1, encodes a basic helix-loop-helix transcription factor expressed in erythroid, myeloid, megakaryocytic, and hematopoietic stem cells. To be able to make use of the unique tissue-restricted and spatio-temporal expression pattern of the SCL gene, we have generated a knock-in mouse line containing the tTA-2S tetracycline transactivator under the control of SCL regulatory elements. Analysis of this mouse using different tetracycline-dependent reporter strains demonstrated that switchable transgene expression was restricted to erythrocytes, megakaryocytes, granulocytes, and, importantly, to the c-kit-expressing and lineage-negative cell fracti…

β-Aminobutyric Acid Primes an NADPH Oxidase–Dependent Reactive Oxygen Species Production During Grapevine-Triggered Immunity

2010

International audience; The molecular mechanisms underlying the process of priming are poorly understood. In the present study, we investigated the early signaling events triggered by β-aminobutyric acid (BABA), a well-known priming-mediated plant resistance inducer. Our results indicate that, in contrast to oligogalacturonides (OG), BABA does not elicit typical defense-related early signaling events nor defense-gene expression in grapevine. However, in OG-elicited cells pretreated with BABA, production of reactive oxygen species (ROS) and expression of the respiratory-burst oxidase homolog RbohD gene were primed. In response to the causal agent of downy mildew Plasmopara viticola, a strong…

Una nación descamisada : Ortega y Gasset y su idea de España durante la Primera Guerra Mundial (1914-1918)

2015

Ortega dedicó una atención algo escasa a la Primera Guerra Mundial en sus escritos. Pero para él la guerra fue una posibilidad de pensar la posibilidad de regeneración de la nación española . Estuvo menos interesado en escoger campos entre los aliados o Alemania que en lamentar los efectos de la neutralidad para España (en 1914 como en 1918). Esta equidistancia revisable fue, además, su manera de crearse un lugar en el campo de fuerzas intelectual y en la esfera política.Ortega insistió siempre en que la neutralidad, si era fruto de la debilidad, era la peor cosa que podía sucederle a España, pues la condenaba a la periferia de la toma de decisiones internacionales. Era causa y a la vez efe…

Spatio-temporal expression of Prospero is finely tuned to allow the correct development and function of the nervous system in Drosophila melanogaster.

2007

0012-1606 (Print) Comparative Study Journal Article Research Support, Non-U.S. Gov't; Adaptive animal behaviors depend upon the precise development of the nervous system that underlies them. In Drosophila melanogaster, the pan-neural prospero gene (pros), is involved in various aspects of neurogenesis including cell cycle control, axonal outgrowth, neuronal and glial cell differentiation. As these results have been generally obtained with null pros mutants inducing embryonic lethality, the role of pros during later development remains poorly known. Using several pros-Voila (prosV) alleles, that induce multiple developmental and behavioral anomalies in the larva and in adult, we explored the…

Peptidases specific for proline-containing peptides and their unusual peptide-dependent regulation in Oenococcus oeni

2009

International audience; Growth of the lactic acid bacterium (LAB) Oenococcus oeni, which is involved in malolactic fermentation during the winemaking process, is stimulated by peptides originating from yeast. In this study, we investigated the impact of peptides on O. oeni growth, peptidase activity and the expression of genes encoding the studied peptidases. Low levels of PepN activity and very high levels of PepI activity were observed in O. oeni, whereas levels of PepX activity were intermediate. The level of biosynthesis of these O. oeni peptidases was shown to depend on peptides present in the culture medium. These results were confirmed by transcriptional analyses of putative pep gene…

Sur le fonctionnement du Journal de Mathématiques Pures et Appliquées entre 1917 et 1937 d'après des lettres inédites de Henri Villat à Robert de Mon…

2011

We are interested in the Journal of Mathématiques Pures and Appliquées (JMPA) over the period 1917-1937. From the end of 1921 , two mathematicians worked to its publication, Henri Villat as editor in chief and Robert Montessus Ballore as associate editor. Through unpublished letters , we descrive the operation of the JMPA after WWI.

METAGENOMIC ANALYSIS OF PHYTOPHTHORA DIVERSITY IN NURSERIES OF POTTED ORNAMENTAL SPECIES.

2015

The genetic diversity of Phytophthora was investigated in soil and root samples of potted ornamental and fruit tree plants collected in nurseries located in Apulia and Calabria (Southern Italy) using metagenomic approaches based on Phytophthora genus specific primers. PCR amplicons containing the ITS1 region of the rDNA were sequenced using both a conventional cloning and Sanger sequencing approach and a 454 pyrosequencing protocol. All sequences were accurately analyzed with an appropriate software and used as barcode for species identification utilizing a validated ITS database. The cloning/Sanger sequencing approach enabled the identification of nine different Phytophthora taxa (P. nicot…

Acyl Transferase Domains of Putative Polyketide Synthase (PKS) Genes in Aspergillus and Penicillium Producers of Ochratoxin A and the Evaluation of P…

2009

Fungal polyketide synthases (PKS) are responsible for the biosynthesis of several mycotoxins and other secondary metabolites. PKS genes in ochratoxin producing species from Aspergillus and Penicillum genera have been identified using a degenerate primer pair developed for the acyl transferase (AT) domain of fungal PKSs. Sequences of AT domains were aligned and analyzed using phylogenetic methods. The AT domain sequences appeared to be specific for a particular type of fungal PKSs and were related to PKSs involved in different mycotoxin biosynthesis pathways, including ochratoxin A. We have also developed primers suitable for amplifying AT domain sequences in strains belonging to the A. nig…

Real-time PCR based procedures for detection and quantification of Aspergillus carbonarius in wine grapes

2008

9 pages, 4 tables, 1 figure.