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    1. Developmental Biology

    Jak-Stat pathway induces Drosophila follicle elongation by a gradient of apical contractility

    Hervé Alégot et al.
    A morphogen gradient can trigger tissue elongation via a control of apical cell pulsing and without a planar cell polarity requirement.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    WNT signaling memory is required for ACTIVIN to function as a morphogen in human gastruloids

    Anna Yoney et al.
    The requirement for WNT signaling in mesendoderm differentiation is temporally separate from that of ACTIVIN signaling and acts to switch the output of ACTIVIN/SMAD2 from pluripotency maintenance to mesendoderm patterning.
    1. Stem Cells and Regenerative Medicine

    Bone morphogenic protein signalling suppresses differentiation of pluripotent cells by maintaining expression of E-Cadherin

    Mattias Malaguti et al.
    The differentiation decisions made by pluripotent cells depend on their exposure to appropriate extrinsic signals and also on morphogenetic events that control receptivity to those differentiation cues.
    1. Developmental Biology

    Release and spread of Wingless is required to pattern the proximo-distal axis of Drosophila renal tubules

    Robin Beaven, Barry Denholm
    In contrast to growing evidence that juxtracrine signalling accounts for Wnt/Wingless patterning function, Wingless behaves as a released signal in Drosophila renal tubule development, being secreted from the midgut to spread and pattern the proximal tubule.
    1. Cell Biology
    2. Developmental Biology

    Cleavage activates Dispatched for Sonic Hedgehog ligand release

    Daniel P Stewart et al.
    Dispatched cleavage, mediated by Furin, regulates Dispatched membrane trafficking and release of Sonic Hedgehog ligand.
    1. Cell Biology
    2. Developmental Biology

    Dpp controls growth and patterning in Drosophila wing precursors through distinct modes of action

    Pablo Sanchez Bosch et al.
    Striped expression of Dpp in Drosophila wing precursors leads to graded signalling activity that positions wing veins and, in parallel, promotes growth in a gradient-independent manner by supplying signalling activity above a threshold.
    1. Cell Biology
    2. Developmental Biology

    Dpp from the anterior stripe of cells is crucial for the growth of the Drosophila wing disc

    Shinya Matsuda, Markus Affolter
    A recent report proposing that the dpp stripe (the main source of the protein dpp) is dispensable for Drosophila wing disc growth missed the critical role on growth due to imprecise spatial removal of dpp.
    1. Computational and Systems Biology
    2. Developmental Biology

    Noise modulation in retinoic acid signaling sharpens segmental boundaries of gene expression in the embryonic zebrafish hindbrain

    Julian Sosnik et al.
    Direct measurements of retinoic acid using fluorescence lifetime imaging reveal a new role for cellular retinoic acid binding proteins in noise attenuation that is critical to sharpen hindbrain rhombomere boundaries.
    1. Computational and Systems Biology
    2. Developmental Biology

    A re-inducible gap gene cascade patterns the anterior–posterior axis of insects in a threshold-free fashion

    Alena Boos et al.
    The body axis of insects is divided into different fates using a self-regulatory and threshold-free mechanism.
    1. Plant Biology

    A plant chitinase controls cortical infection thread progression and nitrogen-fixing symbiosis

    Anna Malolepszy et al.
    Lotus japonicus chitinase modulates the level of rhizobial Nod factor and thereby enables cortical infection and functional symbiosis in root nodules.