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A Lignin Molecular Brace Controls Precision Processing of Cell Walls Critical for Surface Integrity in Arabidopsis

Title
A Lignin Molecular Brace Controls Precision Processing of Cell Walls Critical for Surface Integrity in Arabidopsis
Authors
Lee, YureeYoon, Taek HanLee, JiyounJeon, So YeonLee, Jae HoLee, Mi KyoungChen, HuizeYun, JuOh, Se YunWen, XiaohongCho, Hui KyungMang, HyunggonKwak, June Myoung
DGIST Authors
Kwak, June Myoung
Issue Date
2018-05
Citation
Cell, 173(6), 1468-1480
Type
Article
Article Type
Article
Author Keywords
abscissioncell wall processingcutinlignin bracereactive oxygen speciestransdifferentiation
ISSN
0092-8674
Abstract
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. Here, we identify two neighboring cell types in Arabidopsis that coordinate their activities to control cell wall processing, thereby ensuring 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. Together, we show how plants precisely accomplish abscission. A honeycomb-shaped structure of lignin is a key feature, allowing the precise separation between two cell layers during flower abscission. © 2018 Elsevier Inc.
URI
http://hdl.handle.net/20.500.11750/6382
DOI
10.1016/j.cell.2018.03.060
Publisher
Cell Press
Related Researcher
  • Author Kwak, June Myoung Lab of Cell Signaling and Development
  • Research Interests Calcium Signaling; ABA;ROS Signaling; plant development; Development of Abscission; Culluar Features; Signaling network; Environmental Regulation
Files:
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Collection:
Department of New BiologyLab of Cell Signaling and Development1. Journal Articles


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