Search results for "Crypt"

NO signaling in tobacco elicited by the MAMP cryptogein

2015

SPEPôle IPM; International audience; During the past years, nitric oxide (NO) has been shown to be a major cell signaling messenger in plants. Its importance has been highlighted during plant responses to pathogen attack or MAMPs (microbe associated molecular patterns) and during induced resistance or priming phenomenon. The major focus of our research is to understand how nitric oxide can modulate the activity of protein involved in plant defense. We identified several proteins undergoing S-nitrosylation, a redox-based post-translational modification of proteins, in tobacco cells elicited by cryptogein, a 10 kDa protein produced by the oomycete Phytophthora cryptogea and inducing immune re…

Calcium signaling in plant defense: involvement of subcellular compartments and glutamate receptorsCalcium signaling in plant defense: involvement of…

2012

Les histones désacétylases de type 2 (HD2) : caractérisation fonctionnelle dans l'immunité des plantes

2016

Les histones désacétylases (HDAC) sont des enzymes qui catalysent les réactions de désacétylation des protéines, une modification post-traductionnelle caractérisée par le retrait d’un groupement acétyle des chaînes latérales des résidus de lysine des protéines. Chez les plantes, il existe trois familles de HDAC. Les deux premières – les familles RDP3/HDA1 et SIR2 – sont communes à tous les eucaryotes, alors que la troisième – la famille des HD2 – est spécifique des plantes. Chez le tabac, des HD2 ont été identifiées comme des régulateurs négatifs de la réponse hypersensible induite par la cryptogéine, un éliciteur protéique. La réponse hypersensible est une réponse de défense caractérisée p…

NO signaling in cryptogein-induced immune responses in tobacco

2014

Study of the chaperone protein CDC48 and its involvement in plant immunity

2018

CDC48 is a conserved chaperone protein belonging to the AAA+ ATPase family (ATPase associated with various activities). This protein uses binding and hydrolysis of ATP to generate forces to affect the transformation of polypeptide substrate in numerous cellular processes. Studies on mammalian CDC48 orthologue revealed that it recognizes ubiquitylated polypeptides, directly or via partners, leading to substrate degradation or recycling. In plants, functions of CDC48 is less understood. The aim of my thesis, is to decipher the role of CDC48 in plant defense response context. First, I have to characterize NtCDC48 in tobacco (Nicotiana tabacum) suspension cells elicited by cryptogein, an elicit…

Effect of commercially available Plant Defence Stimulators on human innate immunity

2015

PDS (Plant defence stimulators) constitute a recent alternative to pesticides used for crop protection. These compounds are of diverse nature, they all act by stimulating plant innate immune system and plants can better fight pathogens. There are many similarities in pathogen perception systems and cellular signalling in plants and animals. Many elicitors stimulate both human and plant innate immunity (Zipfel and Felix, 2005). Therefore, it is likely that human innate immunity could be modulated by PDS. The aim of this study is to evaluate pro/anti-inflammatory activity of five different commercially available PDS on human cell models. We studied the pro/anti-inflammatory effect of PDS on h…

The role of NtRBOHD in regulation of response to cryptogein in tobacco cells

2014

International audience

Réponses des cellules de Nicotiana tabacum à des molécules microbiennes : évènements de signalisation précoce, influence de la dynamique membranaire …

2018

Responses of Nicotiana tabacum cells to microbial molecule treatments: early signaling events,influence of membrane dynamics, and sugar fluxesIn their natural environment plants are in close interaction with beneficial, neutral, or pathogenicmicrobes, which are highly dependent on carbon resources exuded by plant roots. Sugar transport, which isa key process of plant physiology, is essential to support the fate of plant-microbe interactions. Duringevolution, plants have acquired the ability to perceive microbial molecules, initiating specific signaltransduction cascades and leading to adapted response for microbe lifestyles (avirulent, virulent, or benefic).Plant survival will depend on the…

Grafengruft in neuer Würde - die Grablege derer von Ehrentreuter/ von Wedel unter der reformierten Kirche in Loga/ Leer

2018

International audience

A l'origine du chantier gothique : la crypte romane, approche archéologique

2011

Sous la cathédrale Saint-Étienne d'Auxerre, la conservation de la crypte du xie siècle à travers les siècles ne relève pas du hasard, mais trouve son origine à la fois dans une utilisation raisonnée des maçonneries, comme socle du chevet gothique, et dans son adaptation aux liturgies successives du xie au xiiie siècle. Après avoir décrit les éléments essentiels de cet espace et analyser les diverses sources, l'archéologie nous aide à mieux comprendre cette évolution en retrouvant quelques traces des cathédrales précédentes (ve-ixe siècle). En relevant de nombreux indices, elle montre que la fonction apparente de son déambulatoire a très peu, si ce n'est jamais, été opérante. En présentant l…