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Shedding the Last Layer: Mechanisms of Root Cap Cell Release

Department of Botany and Plant Pathology and Center for Plant Biology, Purdue University, West Lafayette, IN 47907, USA
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Plants 2020, 9(3), 308; https://doi.org/10.3390/plants9030308
Received: 16 January 2020 / Revised: 21 February 2020 / Accepted: 24 February 2020 / Published: 1 March 2020
The root cap, a small tissue at the tip of the root, protects the root from environmental stress and functions in gravity perception. To perform its functions, the position and size of the root cap remains stable throughout root growth. This occurs due to constant root cap cell turnover, in which the last layer of the root cap is released, and new root cap cells are produced. Cells in the last root cap layer are known as border cells or border-like cells, and have important functions in root protection against bacterial and fungal pathogens. Despite the importance of root cap cell release to root health and plant growth, the mechanisms regulating this phenomenon are not well understood. Recent work identified several factors including transcription factors, auxin, and small peptides with roles in the production and release of root cap cells. Here, we review the involvement of the known players in root cap cell release, compare the release of border-like cells and border cells, and discuss the importance of root cap cell release to root health and survival. View Full-Text
Keywords: root cap; border cell; defense root cap; border cell; defense
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MDPI and ACS Style

Kumar, N.; Iyer-Pascuzzi, A.S. Shedding the Last Layer: Mechanisms of Root Cap Cell Release. Plants 2020, 9, 308. https://doi.org/10.3390/plants9030308

AMA Style

Kumar N, Iyer-Pascuzzi AS. Shedding the Last Layer: Mechanisms of Root Cap Cell Release. Plants. 2020; 9(3):308. https://doi.org/10.3390/plants9030308

Chicago/Turabian Style

Kumar, Narender, and Anjali S. Iyer-Pascuzzi. 2020. "Shedding the Last Layer: Mechanisms of Root Cap Cell Release" Plants 9, no. 3: 308. https://doi.org/10.3390/plants9030308

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