Now showing items 1-12 of 12

    • An anisotropic-viscoplastic model of plant cell morphogenesis by tip growth 

      Dumais, Jacques; Shaw, Sidney L.; Steele, Charles R.; Long, Sharon R.; Ray, Peter M. (UPV/EHU Press, 2006)
      ABSTRACT Plant cell morphogenesis depends critically on two processes: the deposition of new wall material at the cell surface and the mechanical deformation of this material by the stresses resulting from the cell's turgor ...
    • Can Mechanics Control Pattern Formation in Plants? 

      Dumais, Jacques (Elsevier, 2007)
      Development of the plant body entails many pattern forming events at scales ranging from the cellular level to the whole plant. Recent evidence suggests that mechanical forces play a role in establishing some of these ...
    • Foldable structures and the natural design of pollen grains 

      Katifori, Eleni; Alben, Silas; Cerda, Enrique; Nelson, David R.; Dumais, Jacques (Proceedings of the National Academy of Sciences, 2010)
      Upon release from the anther, pollen grains of angiosperm flowers are exposed to a dry environment and dehydrate. To survive this process, pollen grains possess a variety of physiological and structural adaptations. Perhaps ...
    • Generating Helices in Nature 

      Forterre, Yoel; Dumais, Jacques (American Association for the Advancement of Science (AAAS), 2011)
      Macroscopic helical structures formed by organisms include seashells, horns, plant tendrils, and seed pods (see the figure, panel A). The helices that form are chiral; like wood screws, they have a handedness. Some are ...
    • How the Venus Flytrap Snaps 

      Forterre, Yoel; Skotheim, Jan M.; Dumais, Jacques; Mahadevan, Lakshminarayanan (Nature Publishing Group, 2005)
      The rapid closure of the Venus flytrap (Dionaea muscipula) leaf in about 100 ms is one of the fastest movements in the plant kingdom. This led Darwin to describe the plant as "one of the most wonderful in the world". The ...
    • The mechanics of tip growth morphogenesis: what we have learned from rubber balloons 

      Bernal, Roberto; Rojas, Enrique; Dumais, Jacques (Mathematical Sciences Publishers, 2007)
      Morphogenesis of plant, fungal, and bacterial cells depends heavily on surface mechanics and in particular on the stiff wall that surrounds these cells. In this paper, we show that tubular rubber balloons offer a useful ...
    • Quantifying Green Life: Grand Challenges in Plant Biophysics and Modeling 

      Zwieniecki, Maciej A.; Dumais, Jacques (Frontiers Research Foundation, 2011)
    • Stochasticity in the symmetric division of plant cells: when the exceptions are the rule 

      Besson, Sebastien; Dumais, Jacques (Frontiers Media SA, 2014)
      Long before most of the molecular aspects of cell division were uncovered, L. V. Heilbrunn remarked that: “it is easier to make a new theory of cell division than to test an old one” and promised his readers to limit his ...
    • Surface Tension Propulsion of Fungal Spores 

      Noblin, Xavier; Yang, Sylvia; Dumais, Jacques (Company of Biologists, 2009)
      Most basidiomycete fungi actively eject their spores. The process begins with the condensation of a water droplet at the base of the spore. The fusion of the droplet onto the spore creates a momentum that propels the spore ...
    • Tensioning the Helix: A Mechanism for Force Generation in Twining Plants 

      Isnard, Sandrine; Cobb, Alexander R.; Holbrook, Noel Michele; Zwieniecki, Maciej A.; Dumais, Jacques (Royal Society, The, 2009)
      Twining plants use their helical stems to clasp supports and to generate a squeezing force, providing stability against gravity. To elucidate the mechanism that allows force generation, we measured the squeezing forces ...
    • The transcriptional diversity of 25 Drosophila cell lines 

      Cherbas, L.; Willingham, A.; Zhang, D.; Yang, L.; Zou, Y.; Eads, B. D.; Carlson, J. W.; Landolin, J. M.; Kapranov, P.; Dumais, J; Samsonova, A.; Choi, J.-H.; Roberts, J.; Davis, C. A.; Tang, H.; van Baren, M. J.; Ghosh, S.; Dobin, A.; Bell, K.; Lin, W.; Langton, L.; Duff, M. O.; Tenney, A. E.; Zaleski, C.; Brent, M. R.; Hoskins, R. A.; Kaufman, T. C.; Andrews, J.; Graveley, B. R.; Perrimon, Norbert; Celniker, S. E.; Gingeras, T. R.; Cherbas, P. (Cold Spring Harbor Laboratory Press, 2010)
      Drosophila melanogaster cell lines are important resources for cell biologists. Here, we catalog the expression of exons, genes, and unannotated transcriptional signals for 25 lines. Unannotated transcription is substantial ...
    • Universal rule for the symmetric division of plant cells 

      Besson, S.; Dumais, J (Proceedings of the National Academy of Sciences, 2011)
      The division of eukaryotic cells involves the assembly of complex cytoskeletal structures to exert the forces required for chromosome segregation and cytokinesis. In plants, empirical evidence suggests that tensional forces ...