[BK21 Plus Seminar]

▶Subject: Spatiotemporal coordination of cellular activities and architecture during organ separation in Arabidopsis

▶Speaker: Yuree Lee, Ph.D. (Center for plant Aging Research, Institute for Basic Science)

▶Date: 4:00PM/Apr, 26(Thur)/2018

▶Place: : Auditorium(1F), Postech Biotech Center

▶Abctract
The cell wall, a defining feature of plants, provides a rigid structure critical for bonding cells together. To overcome this physical constraint, plants must process cell wall linkages during growth and development. However, little is known about the mechanism guiding cell-cell detachment and cell wall remodeling. I will present our recent findings to show that two neighboring cell types in Arabidopsis coordinate their activities to control cell wall processing, thereby ensure precise abscission to discard organs. One cell type produces a honeycomb structure of lignin, which acts as a mechanical ‘brace’ to localize cell wall breakdown and spatially limit abscising cells. The second cell type undergoes transdifferentiation into epidermal cells, forming protective cuticle, demonstrating de novo specification of epidermal cells, previously thought to be restricted to embryogenesis. Loss of the lignin brace leads to inadequate cuticle formation, resulting in surface barrier defects and susceptible to infection. Understanding the coordination between the two cell types will give a new insight to the abscission processes, which will be further applied to understanding general mechanisms of cell wall processing.

▶Inquiry: Prof. Kyuha Choi(279-2361)

* This seminar will be given in English.
Please refrain from taking photos during seminars. *