{
  "id": 2276794,
  "title": "Clonal microcolonies recruit individual planktonic colonizers using extracellular matrix factors to assemble Vibrio cholerae pellicles",
  "url": "https://urgent.news/2026/08/20/clonal-microcolonies-recruit-individual-planktonic-colonizers-using",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-20T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.20.745993v1?rss=1"
  },
  "original_language": "en",
  "account": "Pellicles, expansive bacterial communities that form on liquid surfaces, are made up of residents that join asynchronously and can exist in different physiological states. The way these cell populations interact to transform segregated founder pellicle microcolonies into a single, large-scale structure remains unclear. Employing high-resolution time-lapse microscopy to observe Vibrio cholerae pellicle formation, researchers have discovered that the cohesive community forms via the recruitment of individual planktonic cells to areas between founder microcolonies.\n\nMoreover, the study highlights the role of Type IV MSHA pili, which assist individual planktonic V. cholerae cells in attaching to the air-liquid interface. These cells also utilize their cell-surface-bound vibrio polysaccharide (VPS), which binds to the Bap1 and RbmC adhesins produced by the existing pellicle microcolonies. Planktonic V. cholerae cells effortlessly attach to the interface through VPS-adhesin binding when they are in the low-cell-density quorum-sensing state, as this mode enhances VPS production.\n\nThrough single-molecule fluorescence in situ hybridization (FISH) of V. cholerae pellicles, the study reveals that regions near pellicle microcolonies, where Bap1 and RbmC adhesin levels are significantly higher, attract a greater proportion of VPS-producing planktonic cells compared to more distant areas. Consequently, existing pellicle microcolony inhabitants in a more developed phase of sessile growth prepare the surface for the attachment of new colonizer cells, thereby establishing a spatial pattern of gene expression within the pellicle community.",
  "summary": "Pellicles, expansive bacterial communities that form on liquid surfaces, contain residents that incorporate asynchronously and exist in distinct physiological states. How interactions between cell populations convert segregated founder pellicle microcolonies into a contiguous, macroscale structure is unknown. Using high resolution timelapse microscopy of Vibrio cholerae pellicle formation, we…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}