Laser ablation microscopy reveals apical notch, apical dominance, and meristem regeneration dynamics in Marchantia polymorpha - PubMed
4 hours ago
- #plant development
- #meristem regeneration
- #laser ablation
- Laser ablation microscopy is used to study meristem dynamics in Marchantia polymorpha.
- Apical notches require the first cell row and a contiguous quorum of stem cells for activity.
- Stem cells communicate and reorient in response to damage, maintaining notch activity.
- Apical dominance signals, likely auxin-mediated, require both sources and sinks.
- Central gemma regions can transmit apical dominance signals, but peripheral tissues cannot.
- A model of intra-, inter-, and extranotch communication is proposed for meristem organization.