Year: 2026
Type: preprint
Abstract: Extracellular RNAs are found in the plant extracellular space, but how they are exported from cells remains unclear. We found that the plant vacuole is a major source of extracellular RNA and identified a class of large e xtracellular vac uole-derived bodies, which we termed EVacs, that are key mediators of this transport. EVacs are marked by the vacuolar membrane (tonoplast) proteins γ-TIP and V-ATPase and originate as intravacuolar structures formed by inward folding of the tonoplast, encapsulating intact cytoplasmic material, including both RNAs and proteins. These intravacuolar bodies then escape the vacuole and are subsequently released from the plasma membrane of mesophyll cells into the apoplast. These findings provide a novel mechanism for the unconventional secretion of macromolecules in plants.
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: green
Awards: ERA-CAPS: Collaborative Research: Role of Extracellular Vesicles in Plant-Microbe Interactions, ERA-CAPS: Collaborative Research: Role of Extracellular Vesicles in Plant-Microbe Interactions, Collaborative Research: RESEARCH-PGR: Extracellular RNA Produced By Plants: What, Where, How, Who, and Why?, Collaborative Research: Ideas Lab: The Role of Extracellular RNA in Intercellular and Interkingdom Communication, Collaborative Research: Ideas Lab: The Role of Extracellular RNA in Intercellular and Interkingdom Communication
OpenAlex ID: W7204902546