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Université de Fribourg

Insight into the evolution of the Solanaceae from the parental genomes of Petunia hybrida

Bombarely, Aureliano ; Moser, Michel ; Amrad, Avichai ; Bao, Manzhu ; Bapaume, Laure ; Barry, Cornelius S. ; Bliek, Mattijs ; Boersma, Maaike R. ; Borghi, Lorenzo ; Bruggmann, Rémy ; Bucher, Marcel ; DAgostino, Nunzio ; Davies, Kevin ; Druege, Uwe ; Dudareva, Natalia ; Egea-Cortines, Marcos ; Delledonne, Massimo ; Fernandez-Pozo, Noe ; Franken, Philipp ; Grandont, Laurie ; Heslop-Harrison, J. S. ; Hintzsche, Jennifer ; Johns, Mitrick ; Koes, Ronald ; Lv, Xiaodan ; Lyons, Eric ; Malla, Diwa ; Martinoia, Enrico ; Mattson, Neil S. ; Morel, Patrice ; Mueller, Lukas A. ; Muhlemann, Joëlle ; Nouri, Eva ; Passeri, Valentina ; Pezzotti, Mario ; Qi, Qinzhou ; Reinhardt, Didier ; Rich, Melanie ; Richert-Pöggeler, Katja R. ; Robbins, Tim P. ; Schatz, Michael C. ; Schranz, M. Eric ; Schuurink, Robert C. ; Schwarzacher, Trude ; Spelt, Kees ; Tang, Haibao ; Urbanus, SusanL. ; Vandenbussche, Michiel ; Vijverberg, Kitty ; Villarino, Gonzalo H. ; Warner, RyanM. ; Weiss, Julia ; Yue, Zhen ; Zethof, Jan ; Quattrocchio, Francesca ; Sims, Thomas L. ; Kuhlemeier, Cris

In: Nature Plants, 2016, vol. 2, p. 16074

Petunia hybrida is a popular bedding plant that has a long history as a genetic model system. We report the whole-genome sequencing and assembly of inbred derivatives of its two wild parents, P. axillaris N and P. inflata S6. The assemblies include 91.3% and 90.2% coverage of their diploid genomes (1.4 Gb; 2n = 14) containing 32,928 and 36,697 protein-coding genes, respectively. The...

Université de Fribourg

Phyllotaxis involves auxin drainage through leaf primordia

Deb, Yamini ; Marti, Dominik ; Frenz, Martin ; Kuhlemeier, Cris ; Reinhardt, Didier

In: Development, 2015, vol. 142, no. 11, p. 1992–2001

The spatial arrangement of leaves and flowers around the stem, known as phyllotaxis, is controlled by an auxin-dependent reiterative mechanism that leads to regular spacing of the organs and thereby to remarkably precise phyllotactic patterns. The mechanism is based on the active cellular transport of the phytohormone auxin by cellular influx and efflux carriers, such as AUX1 and PIN1. Their...

Université de Fribourg

Genome and transcriptome sequencing identifies breeding targets in the orphan crop tef (Eragrostis tef)

Cannarozzi, Gina ; Plaza-Wüthrich, Sonia ; Esfeld, Korinna ; Larti1, Stéphanie ; Wilson, Yi Song ; Girma1, Dejene ; Castro, Edouard de ; Chanyalew, Solomon ; Blösch, Regula ; Farinelli, Laurent ; Lyons, Eric ; Schneider, Michel ; Falquet2, Laurent ; Kuhlemeier, Cris ; Assefa, Kebebew ; Tadele, Zerihun

In: BMC Genomics, 2014, vol. 15, no. 1, p. 581

Background: Tef (Eragrostis tef), an indigenous cereal critical to food security in the Horn of Africa, is rich in minerals and protein, resistant to many biotic and abiotic stresses and safe for diabetics as well as sufferers of immune reactions to wheat gluten. We present the genome of tef, the first species in the grass subfamily Chloridoideae and the first allotetraploid assembled de novo. We...

Université de Fribourg

Elastic domains regulate growth and organogenesis in the plant shoot apical meristem

Kierzkowski, Daniel ; Nakayama, Naomi ; Routier-Kierzkowska, Anne-Lise ; Weber, Alain ; Bayer, Emmanuelle ; Schorderet, Martine ; Reinhardt, Didier ; Kuhlemeier, Cris ; Smith, Richard S.

In: Science, 2012, vol. 335, p. 1096

Although genetic control of morphogenesis is well established, elaboration of complex shapes requires changes in the mechanical properties of cells. In plants, the first visible sign of leaf formation is a bulge on the flank of the shoot apical meristem. Bulging results from local relaxation of cell walls, which causes them to yield to internal hydrostatic pressure. By manipulation of tissue...

Université de Neuchâtel

The sweetest thing: Advances in nectar research

Brandenburg, Anna ; Dell’Olivo, Alexandre ; Bshary, Redouan ; Kuhlemeier, Cris

In: Current Opinion in Plant Biology, 2009, vol. 12, no. 4, p. 486-490

We all appreciate the beauty of flowers, but we seldom consider their function in the life cycle of the plant. The function of beautiful flowers is to advertise the presence of nectar. Floral nectar is the key component in the mutualism between flowering plants and their pollinators. Plants offer nectar as a reward for the transport of pollen by animal vectors. Studying nectar is challenging...

Université de Fribourg

High resolution linkage maps of the model organism Petunia reveal substantial synteny decay with the related genome of tomato

Bossolini, Eligio ; Klahre, Ulrich ; Brandenburg, Anna ; Reinhardt, Didier ; Kuhlemeier, Cris

In: Genome, 2011, vol. 54, p. 327-340

Two linkage maps were constructed for the model plant Petunia. Mapping populations were obtained by crossing the wild species Petunia axillaris subsp. axillaris with Petunia inflata, and Petunia axillaris subsp. parodii with Petunia exserta. Both maps cover the seven chromosomes of Petunia, and span 970 centimorgans (cM) and 700 cM of the genomes, respectively. In total, 207 markers were mapped....

Université de Fribourg

Phosphate systemically inhibits development of arbuscular mycorrhiza in Petunia hybrida and represses genes involved in mycorrhizal functioning

Breuillin, Florence ; Schramm, Jonathan ; Hajirezaei, Mohammad ; Ahkami, Amir ; Favre, Patrick ; Druege, Uwe ; Hause, Bettina ; Bucher, Marcel ; Kretzschmar, Tobias ; Bossolini, Eligio ; Kuhlemeier, Cris ; Martinoia, Enrico ; Franken, Philipp ; Scholz, Uwe ; Reinhardt, Didier

In: The Plant Journal, 2010, p. -

Most terrestrial plants form arbuscular mycorrhiza (AM), mutualistic associations with soil fungi of the order Glomeromycota. The obligate biotrophic fungi trade mineral nutrients, mainly phosphate (Pi), for carbohydrates from the plants. Under conditions of high exogenous phosphate supply, when the plant can meet its own P requirements without the fungus, AM are suppressed,...

Université de Neuchâtel

Adenosine 5'-Phosphosulfate Sulfotransferase and Adenosine 5'-Phosphosulfate Reductase Are Identical Enzymes

Suter, Marianne ; von Ballmoos, Peter ; Kopriva, Stanislav ; Op den Camp, Roel ; Schaller, Johann ; Kuhlemeier, Cris ; Schürmann, Peter ; Brunold, Christian

In: The Journal of Biological Chemistry, 2000, vol. 275, no. 2, p. 930-936

Adenosine 5'-phosphosulfate (APS) sulfotransferase and APS reductase have been described as key enzymes of assimilatory sulfate reduction of plants catalyzing the reduction of APS to bound and free sulfite, respectively. APS sulfotransferase was purified to homogeneity from Lemna minor and compared with APS reductase previously obtained by functional complementation of a mutant strain of...

Université de Neuchâtel

The composition and timing of flower odour emission by wild Petunia axillaris coincide with the antennal perception and nocturnal activity of the pollinator Manduca sexta

Hoballah, Maria Elena ; Stuurman, Jeroen ; Turlings, Ted C. J. ; Guerin, Patrick M. ; Connétable, Sophie ; Kuhlemeier, Cris

In: Planta, 2005, vol. 222, p. 141-150

In the genus Petunia, distinct pollination syndromes may have evolved in association with bee-visitation (P. integrifolia spp.) or hawk moth-visitation (P. axillaris spp). We investigated the extent of congruence between floral fragrance and olfactory perception of the hawk moth Manduca sexta. Hawk moth pollinated P. axillaris releases high levels of several...

Université de Fribourg

Microsurgical and laser ablation analysis of leaf positioning and dorsoventral patterning in tomato

Reinhardt, Didier ; Frenz, Martin ; Mandel, Therese ; Kuhlemeier, Cris

In: Development, 2005, vol. 132, p. 15

Leaves are arranged according to regular patterns, a phenomenon referred to as phyllotaxis. Important determinants of phyllotaxis are the divergence angle between successive leaves, and the size of the leaves relative to the shoot axis. Young leaf primordia are thought to provide positional information to the meristem, thereby influencing the positioning of new primordia and hence the divergence...