Proximity driven plastid-nucleus relationships are facilitated by tandem plastid-ER dynamics.

ABSTRACT: Peri-nuclear clustering (PNC) of chloroplasts has largely been described in senescent and pathogen- or reactive oxygen species-stressed cells. Stromules, tubular plastid extensions, are also observed under similar conditions. Coincident observations of PNC and stromules associate the two phenomena in facilitating retrograde signaling between chloroplasts and the nucleus. However, PNC incidence in non-stressed cells under normal growth and developmental conditions, when stromules are usually not observed, remains unclear. Using transgenic Arabidopsis expressing different organelle-targeted fluorescent proteins, we show that PNC is a dynamic subcellular phenomenon that continues in the absence of light and is not dependent on stromule formation. PNC is facilitated by tandem plastid-endoplasm

SUBMITTER: Kunjumon TK 

PROVIDER: S-EPMC11523032 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature