Journal
PLANT SCIENCE
Volume 253, Issue -, Pages 77-85Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2016.08.006
Keywords
Nuclear movement; Programmed cell death; Root hairs; Arabidopsis
Categories
Funding
- Innovation and Entrepreneurship Training Program of Northwestern University [201510697007]
- National Natural Science Foundation of China [31300243]
- National Science Fund for Fostering Talents in Basic Science [J1210063]
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In this paper we demonstrate the coupling of nuclear migration to the base of Arabidopsis root hairs with programmed cell death (PCD). Nuclear migration and positioning are fundamental processes of eukaryotic cells. To date, no evidence for a direct connection between nucleus migration and PCD has been described in the literature. Based on the findings of our previous study, we hereby further establish the regulatory role of caspase-3-like/DEVDase in root hair death and demonstrate nuclear migration to a position close to the root hair basement during PCD. In addition, continuous observation and statistical analysis have revealed that the nucleus disengages from the root hair tip and moves back to the root after the root hair grows to a certain length. Finally, pharmacological studies have shown that the meshwork of actin filaments surrounding the nucleus plays a pivotal role in nuclear movement during root hair PCD, and the basipetal movement of the nucleus is markedly inhibited by the caspase-3 inhibitor, Ac-DEVD-CHO. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
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