Maternal epigenetic regulation of embryonic patterning in plants.
Maternal epigenetic changes in H3K27me3 regulate embryonic patterning by controlling auxin transport genes in plants, affecting embryo development.
- Why it matters: Understanding how maternal tissues influence embryogenesis is vital for comprehending plant development, yet the epigenetic mechanisms involved remain largely unknown.
- What they did: The study profiled H3K27me3 in maternal integuments and found that dynamic epigenetic modifications activate auxin-transport genes AUX1 and LAX1, facilitating auxin accumulation at the embryo attachment site.
- The result: Disruption of H3K27me3 demethylation or auxin transporter expression reduces auxin levels in the embryo, impairing embryonic patterning and revealing a new maternal epigenetic regulatory pathway.