Reprogramming of Cell Fate During Root Regeneration by Transcriptional and Epigenetic Networks

Many plant species are able to regenerate adventitious roots either directly from aerial organs such as leaves or stems, in particularly after detachment (cutting), or indirectly, from over-proliferating tissue termed callus. In agriculture, this capacity of root formation from cuttings can be used...

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Published inFrontiers in plant science Vol. 11; p. 317
Main Authors Jing, Tingting, Ardiansyah, Rhomi, Xu, Qijiang, Xing, Qian, Müller-Xing, Ralf
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 25.03.2020
Subjects
adventitious roots
callus
DNRR
Plant Science
pluripotency
root regeneration
transcriptional networks
callus
adventitious roots
transcriptional networks
DNRR
pluripotency
epigenetics
root regeneration
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Summary:Many plant species are able to regenerate adventitious roots either directly from aerial organs such as leaves or stems, in particularly after detachment (cutting), or indirectly, from over-proliferating tissue termed callus. In agriculture, this capacity of root formation from cuttings can be used to clonally propagate several important crop plants including cassava, potato, sugar cane, banana and various fruit or timber trees. Direct and indirect root regeneration (DNRR) originates from pluripotent cells of the pericycle tissue, from other root-competent cells or from non-root-competent cells that first dedifferentiate. Independently of their origin, the cells convert into root founder cells, which go through proliferation and differentiation subsequently forming functional root meristems, root primordia and the complete root. Recent studies in the model plants and rice have identified several key regulators building in response to the phytohormone auxin transcriptional networks that are involved in both callus formation and DNRR. In both cases, epigenetic regulation seems essential for the dynamic reprogramming of cell fate, which is correlated with local and global changes of the chromatin states that might ensure the correct spatiotemporal expression pattern of the key regulators. Future approaches might investigate in greater detail whether and how the transcriptional key regulators and the writers, erasers, and readers of epigenetic modifications interact to control DNRR.
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Edited by: Mary Byrne, The University of Sydney, Australia
These authors have contributed equally to this work
Reviewed by: Kalika Prasad, Indian Institute of Science Education and Research, Thiruvananthapuram, India; Uwe Druege, University of Applied Sciences Erfurt, Germany
This article was submitted to Plant Development and EvoDevo, a section of the journal Frontiers in Plant Science
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2020.00317