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Volume 7 Issue 10, October 2005

Microtubules of cortical arrays in plant cells are nucleated on existing microtubules as branches. Overlaid colour images are shown of the cortical microtubules in living tobacco cells at 5-minute intervals.

Volume 7 Issue 10

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Editorial

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Book Review

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News & Views

  • Plant cortical microtubule arrays influence plant morphogenesis, but the nature of microtubule genesis and self-organization has long puzzled cell biologists. In this issue, Murata and coworkers provide some answers by showing that γ-tubulin nucleates new microtubules along the lengths of existing microtubules, resulting in dispersed 'Y'-branched organizational centres.

    • Richard Cyr
    News & Views

  • Anaphase onset is triggered when the protease separase cleaves the cohesive bond that holds replicated sister chromatids together until metaphase. In budding yeast, separase then also regulates mitotic exit. New findings suggest that in vertebrates, separase also participates in cell-cycle regulation, albeit in an unexpected manner.

    • Ethel Queralt
    • Frank Uhlmann
    News & Views

  • Extracellular signalling regulates a plethora of multicellular processes. For microbes, maintaining a specific cell–cell signal in an extracellular environment crowded by other species can be extremely challenging. Two recent papers demonstrate how different bacteria have adapted to avoid, or exploit, species cross-signalling.

    • Hera C. Vlamakis
    • Roberto Kolter
    News & Views
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