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Related Experiment Videos

Phyllotaxis: A Matthew Effect in Auxin Action.

Dolf Weijers1

  • 1Laboratory of Biochemistry, Wageningen University, Dreijenlaan 3, 6703HA Wageningen, the Netherlands.

Current Biology : CB
|December 7, 2016
PubMed
Summary

Plant organ initiation relies on local auxin peaks. A new study suggests a cellular Matthew effect, where auxin concentrates in cells already possessing higher levels, driving peak formation.

Area of Science:

  • Plant biology
  • Developmental biology
  • Molecular signaling

Background:

  • Organ initiation in plants is regulated by local maxima of auxin concentration within the shoot apical meristem.
  • The precise mechanisms by which these critical auxin peaks are generated have remained largely elusive.
  • Understanding auxin distribution is key to deciphering plant development.

Purpose of the Study:

  • To elucidate the mechanism responsible for the formation of local auxin concentration maxima in the plant shoot meristem.
  • To investigate the role of cellular transport dynamics in establishing auxin gradients.
  • To propose a novel model for auxin peak generation.

Main Methods:

  • Computational modeling of auxin transport and diffusion dynamics.

Related Experiment Videos

  • Mathematical simulation of cellular auxin accumulation based on transport rates.
  • Analysis of theoretical cellular behaviors under varying auxin concentrations.

    • Main Results:

    • A proposed 'cellular Matthew effect' mechanism explains auxin peak formation.
    • Cells with higher initial auxin concentrations attract more auxin via active transport.
    • This positive feedback loop leads to the amplification of local auxin maxima.

    Conclusions:

    • The cellular Matthew effect provides a plausible explanation for auxin peak formation driving organ initiation.
    • Auxin transport dynamics, rather than solely synthesis or degradation, are critical for establishing developmental gradients.
    • This finding offers new insights into the regulation of plant shoot development and organogenesis.