Affiner les résultats


Université de Fribourg

Hatching with the enemy: Daphnia diapausing eggs hatch in the presence of fish kairomones

Lass, Sandra ; Vos, Matthijs ; Wolinska, Justyna ; Spaak, Piet

In: Chemoecology, 2005, vol. 15(1), p. 7

Infochemicals are known to play a key role in mediating predator-prey interactions, both in aquatic and terrestrial communities. However, state-dependent variation may exist in how effectively individuals can use this information, depending on genotype, life stage and experience. For our study, we used the predator-prey model system fish-waterflea Daphnia magna Straus (Cladocera,...

Université de Lausanne

Combined transcriptomic and proteomic studies reveal non-canonical signaling functions in the jasmonate pathway

Liechti, Robin ; Farmer, Edward (Dir.)

Thèse de doctorat : Université de Lausanne, 2005.

Les signaux dérivés d’acides gras sont des médiateurs de réponses aux stress et de la défense des eucaryotes multicellulaires. Parmi eux, les jasmonates sont de puissants composés de signalisation chez les plantes. L’acide jasmonique (JA) et l’acide 12-oxophytodienoïc (OPDA) sont les deux membres les mieux caractérisés de la grande famille des jasmonates. Cette thèse étudie plus...

Université de Fribourg

Large-scale gene discovery in the oomycete Phytophthora infestans reveals likely components of phytopathogenicity shared with true fungi

Dwyer, Rex A. ; Huitema, Edgar ; Beyer, Katinka ; Cvitanich, Cristina ; Kelkar, Hemant ; Ah Fong, Audrey M. V. ; Gates, Krista ; Roberts, Samuel ; Yatzkan, Einat ; Gaffney, Thomas ; Law, Marcus ; Testa, Antonino ; Torto-Alalibo, Trudy ; Zhang, Meng ; Zheng, Li ; Mueller, Elisabeth ; Windass, John ; Binder, Andres ; Birch, Paul R. J. ; Gisi, Ulrich ; Govers, Francine ; Gow, Neil A. ; Mauch, Felix ; West, Pieter van ; Waugh, Mark E. ; Yu, Jun ; Boller, Thomas ; Kamoun, Sophien ; Lam, Stephen T. ; Judelson, Howard S.

In: Molecular Plant-Microbe Interactions, 2005, vol. 18(3), p. 229

To overview the gene content of the important pathogen Phytophthora infestans, large-scale cDNA and genomic sequencing was performed. A set of 75,757 high-quality expressed sequence tags (ESTs) from P. infestans was obtained from 20 cDNA libraries representing a broad range of growth conditions, stress responses, and developmental stages. These included libraries from P....

Université de Neuchâtel

Evaluation of a yeast system for studying the function of plant vacuolar sorting receptors (VSRs)

Hodel Hernandez, Doramys ; Neuhaus, Jean-Marc (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2005 ; 1800.

The yeast S.cerevisiae is not an efficient tool for in vivo studies of plant vacuolar sorting receptors Plant and yeast vacuoles, the equivalents of mammalian lysosomes, are acidic compartments involved in hydrolytic functions. They are also essential for metabolite storage and for maintaining cytosolic ion and pH homeostasis (Klionsky and Emr, 1990; Wink, 1993). The vacuoles mainly receive...


Etude expérimentale des couplages viscoélasticité-croissance des fissures dans les bétons de ciment

Denarié, Emmanuel ; Huet, Christian (Dir.)

Thèse sciences techniques Ecole polytechnique fédérale de Lausanne EPFL : 2000 ; no 2195.


Calcium dynamics and intercellular communication in arterial smooth muscle cells

Lamboley, Mathieu ; Meister, Jean-Jacques (Dir.)

Thèse sciences Ecole polytechnique fédérale de Lausanne EPFL : 2004 ; no 3161.


Photodissociation studies of CH3I and CF3I in fluid 4Helium nanodroplets

Braun, Andreas ; Drabbels, Marcel (Dir.)

Thèse sciences Ecole polytechnique fédérale de Lausanne EPFL : 2004 ; no 2967.


Alternative redox systems for the dye-sensitized solar cell

Nusbaumer, Hervé ; Grätzel, Michael (Dir.)

Thèse sciences Ecole polytechnique fédérale de Lausanne EPFL : 2004 ; no 2955.

Université de Fribourg

The clock gene Per2 influences the glutamatergic system and modulates alcohol consumption

Spanagel, Rainer ; Pendyala, Gurudutt ; Abarca, Carolina ; Zghoul, Tarek ; Sanchis-Segura, Carles ; Magnone, Maria Chiara ; Lascorz, Jesús ; Depner, Martin ; Holzberg, David ; Soyka, Michael ; Schreiber, Stefan ; Matsuda, Fumihiko ; Lathrop, Mark ; Schumann, Gunter ; Albrecht, Urs

In: Nature Medicine, 2004, vol. 11, p. 35-42

Period (Per) genes are involved in regulation of the circadian clock and are thought to modulate several brain functions. We demonstrate that Per2Brdm1 mutant mice, which have a deletion in the PAS domain of the Per2 protein, show alterations in the glutamatergic system. Lowered expression of the glutamate transporter Eaat1 is observed in these animals, leading to reduced uptake of glutamate by...

Université de Fribourg

Dissecting the ß-aminobutyric acid–induced priming phenomenon in Arabidopsis

Ton, Jurriaan ; Jakab, Gabor ; Toquin, Valérie ; Flors, Victor ; Iavicoli, Annalisa ; Maeder, Muriel N. ; Métraux, Jean-Pierre ; Mauch-Mani, Brigitte

In: The Plant Cell, 2005, vol. 17, p. 987-999

Plants treated with the nonprotein amino acid ß-aminobutyric acid (BABA) develop an enhanced capacity to resist biotic and abiotic stresses. This BABA-induced resistance (BABA-IR) is associated with an augmented capacity to express basal defense responses, a phenomenon known as priming. Based on the observation that high amounts of BABA induce sterility in Arabidopsis thaliana, a mutagenesis...