Parental conflict driven regulation of endosperm cellularization by a family of Auxin Response Factors.

ABSTRACT: The endosperm is a reproductive tissue supporting embryo development. In most flowering plants, the initial divisions of endosperm nuclei are not succeeded by cellularization; this process occurs only after a specific number of mitotic cycles have taken place. The timing of cellularization significantly influences seed viability and size. Previous research implicated auxin as a key factor in initiating nuclear divisions and determining the timing of cellularization. Here we uncover the involvement of a family of clustered auxin response factors (cARFs) as dosage-sensitive regulators of endosperm cellularization. cARFs, maternally expressed and paternally silenced, are shown to induce cellularization, thereby restricting seed growth. Our findings align with the predictions of the parental c

SUBMITTER: Butel N 

PROVIDER: S-EPMC11208147 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature