Village Hotel Changi, Singapore
3rd Edition Of Plant Science and Molecular Biology World Conference 2026
Speakers - PMBWC2025
Gayeon Kim
- Designation: Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)
- Country: South Korea
- Title: Feronia Defines Intact Tissue Boundaries Through Cuticle Development
Abstract
Upon wounding, damaged plant tissues initiate healing processes such as callus formation at the wound site. However, the signaling molecules and mechanisms that mediate callus formation in the wound-proximal region remain poorly understood. Here, we show that wounding-induced cuticle defects stimulate NADPH oxidase-dependent production of reactive oxygen species (ROS), which act as wound signals to trigger callus formation. The malectin-like receptor-like kinase FERONIA (FER) senses wound-induced pectin modification and promotes de novo cuticle formation in mesophyll cells adjacent to the wound. This newly formed cuticle acts as a barrier that limits ROS propagation, thereby confining callus formation to the wound-proximal region and preventing disorganized proliferation. In addition, ROS restriction enables the activation of programmed cell death in cells immediately adjacent to the wound. These findings provide further understanding in molecular mechanisms underlying cuticle formation required during leaf expansion and the restriction of highly oxidative signals to the wound site for preserving the integrity of undamaged regions.
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