476 results found
    1. Plant Biology

    Anisotropic growth is achieved through the additive mechanical effect of material anisotropy and elastic asymmetry

    Firas Bou Daher et al.
    Growing upwards in the young seedling is controlled by two cooperative mechanical mechanisms: cellulose orientation in inner tissues and differential elasticity in epidermal cells.
    1. Cell Biology
    2. Developmental Biology

    Anisotropic organization of circumferential actomyosin characterizes hematopoietic stem cells emergence in the zebrafish

    Mylene Lancino et al.
    Emergence of hematopoietic stem cells from an aortic component is a unique phenomenon of cell extrusion, with no equivalent in cell biology, and which is adapted to environmental constraints exerted by endothelial cells and hemodynamics forces.
    1. Cell Biology
    2. Plant Biology

    Two mechanisms regulate directional cell growth in Arabidopsis lateral roots

    Charlotte Kirchhelle et al.
    In lateral roots, cells employ a novel pathway to cell edges to control directional growth, which acts independently of the leading paradigm of oriented deposition of cellulose microfibrils at faces.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Single-color, ratiometric biosensors for detecting signaling activities in live cells

    Brian L Ross et al.
    A novel panel of homoFRET biosensors that detect kinase and second messenger activity, called FLAREs, enables multiparameter imaging of signaling activities within a single live cell with a quantitative and ratiometric readout.
    1. Plant Biology

    KATANIN-dependent mechanical properties of the stigmatic cell wall mediate the pollen tube path in Arabidopsis

    Lucie Riglet et al.
    KATANIN1 in stigma papilla cells prevents disordered pollen tube growth and straightens pollen tube direction, allowing the pollen tube to find its correct path to the underlying female tissues.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    Evidence for DNA-mediated nuclear compartmentalization distinct from phase separation

    David Trombley McSwiggen et al.
    Transient DNA interactions by DNA-binding proteins are utilized by herpes simple virus as an alternative route to generate membraneless compartments in the nucleus without invoking phase separation.
    1. Neuroscience

    Spherical arena reveals optokinetic response tuning to stimulus location, size, and frequency across entire visual field of larval zebrafish

    Florian A Dehmelt et al.
    Systematic stimulation across the entire visual field reveals that zebrafish optokinetic behavior is most strongly driven by lateral stimulus locations, as a result of both retinal and extra-retinal effects.
    1. Physics of Living Systems

    Epithelial colonies in vitro elongate through collective effects

    Jordi Comelles et al.
    Spontaneous elongation of epithelial colonies is related to the orientation of the mean nematic cell elongation field, as shown and tested with experiments and theory.
    1. Cell Biology
    2. Physics of Living Systems

    Interplay of cell dynamics and epithelial tension during morphogenesis of the Drosophila pupal wing

    Raphaël Etournay et al.
    Autonomous patterns of cell contraction in the context of localized apical extracellular matrix constraints specify tissue stresses that reshape the wing epithelium.
    1. Computational and Systems Biology
    2. Developmental Biology

    Why plants make puzzle cells, and how their shape emerges

    Aleksandra Sapala et al.
    Puzzle-shape cells in the epidermis of many plants form due to a development constraint based on mechanical forces.

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