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Université de Fribourg

Xenacoelomorpha survey reveals that all 11 animal homeobox gene classes were present in the first bilaterians

Brauchle, Michael ; Bilican, Adem ; Eyer, Claudia ; Bailly, Xavier ; Martínez, Pedro ; Ladurner, Peter ; Bruggmann, Rémy ; Sprecher, Simon G.

In: Genome Biology and Evolution, 2018, vol. 10, no. 9, p. 2205–2217

Homeodomain transcription factors are involved in many developmental processes across animals and have been linked to body plan evolution. Detailed classifications of these proteins identified 11 distinct classes of homeodomain proteins in animal genomes, each harboring specific sequence composition and protein domains. Although humans contain the full set of classes, Drosophila melanogaster...

Université de Fribourg

An emerging system to study photosymbiosis, brain regeneration, chronobiology, and behavior: the marine acoel symsagittifera roscoffensis

Arboleda, Enrique ; Hartenstein, Volker ; Martinez, Pedro ; Reichert, Heinrich ; Sen, Sonia ; Sprecher, Simon ; Bailly, Xavier

In: BioEssays, 2018, vol. 40, no. 10, p. 1800107

The acoel worm Symsagittifera roscoffensis, an early offshoot of the Bilateria and the only well-studied marine acoel that lives in a photosymbiotic relationship, exhibits a centralized nervous system, brain regeneration, and a wide repertoire of complex behaviors such as circatidal rhythmicity, photo/geotaxis, and social interactions. While this animal can be collected by the thousands and...

Université de Fribourg

An expression atlas of variant ionotropic glutamate receptors identifies a molecular basis of carbonation sensing

Sánchez-Alcañiz, Juan Antonio ; Silbering, Ana Florencia ; Croset, Vincent ; Zappia, Giovanna ; Sivasubramaniam, Anantha Krishna ; Abuin, Liliane ; Sahai, Saumya Yashmohini ; Münch, Daniel ; Steck, Kathrin ; Auer, Thomas O. ; Cruchet, Steeve ; Neagu-Maier, G. Larisa ; Sprecher, Simon G. ; Ribeiro, Carlos ; Yapici, Nilay ; Benton, Richard

In: Nature Communications, 2018, vol. 9, no. 1, p. 4252

Little is known about the role of variant ionotropic glutamate receptors (IRs) in insect taste. Here the authors characterise the expression pattern of IRs in the Drosophila gustatory system and highlight the role of one receptor, IR56d, in the detection of carbonation

Université de Fribourg

Localization and functional characterization of the pathogenesis-related proteins Rbe1p and Rbt4p in Candida albicans

Bantel, annick ; Darwiche, Rabih ; Rupp, Steffen ; Schneiter, Roger ; Sohn, Kai

In: PLOS ONE, 2018, vol. 13, no. 8, p. e0201932

Members of the Cysteine-rich secretory protein, Antigen 5 and Pathogenesis-related 1 (CAP) protein superfamily are important virulence factors in fungi but remain poorly characterized on molecular level. Here, we investigate the cellular localization and molecular function of Rbe1p and Rbt4p, two CAP family members from the human pathogen Candida albicans. We unexpectedly found that Rbe1p...

Université de Fribourg

Circadian clocks and sleep: impact of rhythmic metabolism and waste clearance on the brain

Albrecht, Urs ; Ripperger, Jürgen A.

In: Trends in Neurosciences, 2018, vol. 41, no. 10, p. 677–688

The rotation of the Earth around its axis causes periodic exposure of half of its surface to sunlight. This daily recurring event has been internalized in most organisms in the form of cellular circadian clock mechanisms. These cellular clocks are synchronized with each other in various ways to establish circadian networks that build the circadian program in tissues and organs, coordinating...

Université de Fribourg

Deregulation of MADS-box transcription factor genes in a mutant defective in the WUSCHEL-LIKE HOMEOBOX gene EVERGREEN of Petunia hybrida

Schorderet, Martine ; Muni, Rajasekhara Reddy Duvvuru ; Fiebig, A. ; Reinhardt, Didier

In: Plant Signaling & Behavior, 2018, vol. 13, no. 6, p. e1471299

Angiosperm inflorescences develop in two fundamentally different ways. In monopodial plants, for example in Arabidopsis thaliana, the flowers are initiated as lateral appendages of a central indeterminate inflorescence meristem. In sympodial plants, flowers arise by terminal differentiation of the inflorescence meristem, while further inflorescence development proceeds from new sympodial...

Université de Fribourg

Beneficial services of arbuscular mycorrhizal fungi – from ecology to application

Chen, Min ; Arato, Miguel ; Borghi, Lorenzo ; Nouri, Eva ; Reinhardt, Didier

In: Frontiers in Plant Science, 2018, vol. 9, p. -

Arbuscular mycorrhiza (AM) is the most common symbiotic association of plants with microbes. AM fungi occur in the majority of natural habitats and they provide a range of important ecological services, in particular by improving plant nutrition, stress resistance and tolerance, as well as soil structure and fertility. AM fungi interact with most crop plants including cereals, vegetables, and...

Université de Fribourg

Pine stand density influences the regeneration of Acacia saligna (Labill.) H.L.Wendl. and native woody species in a mediterranean coastal pine plantation

Badalamenti, Emilio ; da Silveira Bueno, Rafael ; Campo, Olimpia ; Gallo, Martina ; La Mela Veca, Donato Salvatore ; Pasta, Salvatore ; Sala, Giovanna ; La Mantia, Tommaso

In: Forests, 2018, vol. 9, no. 6, p. 359

Mediterranean plantations are the most suitable areas to assess vegetation dynamics and competitive interactions between native and exotic woody species. Our research was carried out in a coastal pine plantation (Sicily) where renaturalization by native species (Pistacia lentiscus L. and Olea europaea var. sylvestris) and invasion by Acacia saligna (Labill.) H.L.Wendl. simultaneously occur....

Université de Fribourg

Wild tomato endosperm transcriptomes reveal common roles of genomic imprinting in both nuclear and cellular endosperm

Roth, Morgane ; Florez-Rueda, Ana M. ; Paris, Margot ; Städler, Thomas

In: The Plant Journal, 2018, vol. 95, no. 6, p. 1084–1101

Genomic imprinting is a conspicuous feature of the endosperm, a triploid tissue nurturing the embryo and synchronizing angiosperm seed development. An unknown subset of imprinted genes (IGs) is critical for successful seed development and should have highly conserved functions. Recent genome‐wide studies have found limited conservation of IGs among distantly related species, but there is a...

Université de Fribourg

GABA immunostaining in the central complex of dicondylian insects

Homberg, Uwe ; Humberg, Tim?Henning ; Seyfarth, Jutta ; Bode, Katharina ; Quintero Pérez, Manuel

In: Journal of Comparative Neurology, 2018, vol. 526, no. 14, p. 2301–2318

The central complex is a group of midline-crossing neuropils in the insect brain involved in head direction coding, sky compass navigation, and spatial visual memory. To compare the neuroarchitecture and neurochemistry of the central complex in insects that differ in locomotion, ways of orientation, time of activity (diurnal, nocturnal), and evolutionary history, we studied the distribution...