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Endoreplication as a potential driver of cell wall modifications.

Rahul Bhosale1, Steven Maere2, Lieven De Veylder3

  • 1Plant and Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, LE12 5RD, United Kingdom; Center for Plant Integrative Biology (CPIB), University of Nottingham, Sutton Bonington, LE12 5RD, United Kingdom.

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Endoreplication, a cell cycle variant, increases cell ploidy. This review suggests endocycle onset drives plant cell growth via transcriptional control of cell wall modification, accommodating turgor-driven expansion.

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Area of Science:

  • Plant Biology
  • Cell Biology
  • Genetics

Background:

  • Endoreplication is a cell cycle variant where DNA replication occurs without cell division, increasing ploidy.
  • This process is significant in higher plants, linked to differentiation, metabolism, and growth.
  • Existing research presents conflicting views on ploidy's direct role in cell growth.

Purpose of the Study:

  • To review evidence on the role of endoreplication in plant cell growth.
  • To explore the mechanisms by which endocycles influence cell expansion.
  • To reconcile differing perspectives on ploidy-dependent growth.

Main Methods:

  • Literature review of studies on endoreplication and plant cell growth.
  • Analysis of data linking endocycle onset to gene expression.
  • Examination of cell wall modification and vacuolar expansion in relation to cell growth.

Main Results:

  • Accumulating data suggest endocycle onset influences cell growth through gene transcription.
  • Transcriptional control of cell wall-modifying genes facilitates cell wall adjustments.
  • Vacuolar expansion, not increased ploidy, appears to be the primary driver of rapid cell expansion.

Conclusions:

  • Endocycle onset may promote cell growth by regulating cell wall properties.
  • Cell wall modification is crucial for accommodating turgor-driven expansion.
  • Vacuolar expansion is the principal mechanism underlying cell growth during endoreplication.