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The arrow of time is an intrinsic dimension of any biological process, but it plays its most transformative role in development. Temporal transcription factor cascades drive cell fate acquisition across intermediate states and through checkpoints. Nutrients are harnessed to feed chemical reactions that power cellular metabolism, while accumulating signals function as timers and molecular clocks for tissue proliferation and patterning as part of morphogenesis. The editors of Nature Communications and Communications Biology invite submissions of primary research that showcase the intricate ways space and time intersect to craft organisms.
This joint Collection between Nature Communications and Communications Biology welcomes submissions of primary research that aim to understand how development events are regulated at the cellular and organismal levels by temporal cues.
Alique et al. show that poplar trees adjust their seasonal growth timing by finely tuning the daily expression level of the photoperiodic integrator FT2 through a mechanism governed by the circadian clock’s core genes.
Seed germination in plants is a tightly controlled process relying on translation of stored RNAs. Here, Tremblay et al. show that nascent transcriptome and epigenome reprogramming are detected from initial stages of germination.
Circadian rhythms are present in cells throughout the body but how these develop is poorly understood. Here, using Drosophila genetics and single cell analysis, authors find that the intestinal clock emerges after development is complete, and that differentiation disrupts its function.
The interpretation of the key developmental signal BMP remains poorly understood. Here, the authors show that the total time-integrated signaling controls differentiation in a stem cell embryo model and provide a possible mechanism.
Changes in epiblast morphology, cell polarity, and correlating gene expression patterns indicate continuous developmental progression during diapause in the roe deer.
Contractile ring formation, positioning, and closure is influenced by tissue mechanics, though how this information is transmitted is unclear. Here they show that Anillin is critical for a mechanosensitive pathway that drives cytokinesis and contractile ring closure.
Imbalance in the growth rate of two organs can perturb their appropriate scaling. Here, Stojanovski et al., identify a mechanism involving the mechanotransducer YAP-1 which ensures proper proportions of the pharynx and the body length of C. elegans.
How synapse development correlates with lifespan is unknown. Here, the authors show isochronic synapse development in mouse and primate despite disparate lifespans. As a result, synapse accumulation and reduction finishes in neonatal primates but spans nearly the entire life of the mouse.
The transcriptional regulator YAP controls cellular decisions such as proliferation, differentiation, and pluripotency. Here, the authors show a concentration-dependent and temporal communication code for YAP that enables cells to choose between these programs.
The limb bud is patterned by crosstalk between the mesoderm and the overlying apical ectodermal ridge, but it has been difficult to determine the requirement for different ligands in this process. Here the authors use a chick wing explant system to show that fibroblast growth factors trigger a mesodermal programme that is key for timing limb bud patterning.
The lymphatic system is a transport network that controls immune response and tissue fluid circulation in the body. Here the authors combine experiment and theory to reveal that developing lymphatic capillary networks exploit complementary branching strategies to optimize tissue coverage.
Marsupial mammals take much longer to develop than similarly sized placental mammals, though how brain development occurs across these different periods is unclear. Here they show that the neurodevelopmental events of cortical neurogenesis, cell migration and axon extension do not all temporally scale to the same extent.
The transient elevation in protein translation during early-adulthood in Drosophila imposes long-lasting negative impacts on future aging trajectories by triggering proteostatic dysfunction at old ages.
Cell division and stem cell maintenance are tightly linked. Here they show that in the hair follicle an epigenetic mechanism maintains mesenchymal niche dormancy in a highly proliferative microenvironment while repurposing mitogenic signaling to orchestrate the hair cycle clock.
Xu and colleagues report that the poly-U-specific endoribonuclease ENDU-2/ENDOU activates a transcriptional reprogramming after a brief heat shock and this has a long-term beneficial effect in the model organism C. elegans.
During somitogenesis, the dynamic oscillation of the molecular clock is converted into static spatial patterns. Here, the authors show that persistent suppression of Tbx6 expression triggered by periodical Ripply1/2 gene expression is a key to this conversion.
Neuromesodermal progenitor (NMP) cells produce and receive Wnt ligands. Here, the authors show that mutual intercellular exchange of Wnt ligands reduces heterogeneity between NMP cells and makes NMP populations robust to environmental stress.
During the dauer state, when worms are quiescent and do not need to feed, their gut becomes a storage unit for cholesterol. This sterol is later needed to exit quiescence via a transcriptional change and activation of growth by mTOR.
An EEG study reports sound-induced suppression of the earliest visual cortical activity in a rare group of humans who were born pattern vision blind but regained sight, indicating persistent crossmodal visual cortical activation after sight recovery.
Analysis of the homeobox gene Tlx across cnidarian genomes highlights the presence of Tlx only in clades featuring the medusa life cycle stage, linking the loss of the gene to loss of the medusa in Hydrozoa evolution.