Plasmodesmata-associated proteins: Can we see the whole elephant?

Shoko Ueki, Vitaly Citovsky

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Encased in rigid cell walls, plant cells have evolved unique channel structures, plasmodesma (Pd), to create a pathway for molecular exchange between adjacent cells. Pd are basically cytoplasmic channels through the cell wall, which are lined by plasma membrane, and contain a modified strand of ER that spans them. These structures provide cytoplasmic and membrane continuity between connected cells, and that continuity is utilized for short and long distance molecular trafficking. Pd sphincters, made from constricting the Pd openings by outer layers of callose, together with the ER strand that occludes the Pd lumen set the upper limit for the size of molecules that can freely diffuse through the cytoplasmic component of the Pd channel. This limit, called the size exclusion limit (SEL), is a major factor that restricts macromolecular transport through Pd.

Original languageEnglish
Article numbere27899
JournalPlant Signaling and Behavior
Issue numberFEB
Publication statusPublished - 2014


  • Callose
  • Plasmodesmata
  • Reactive oxygen species
  • Size exclusion limit
  • Symplastic transport

ASJC Scopus subject areas

  • Plant Science


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