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Related Experiment Videos

Vegetative/Parasitic transition: control and plasticity in striga development.

C E Smith1, M W Dudley, D G Lynn

  • 1Searle Chemistry Laboratories, The University of Chicago, Chicago, Illinois 60637.

Plant Physiology
|May 1, 1990
PubMed
Summary

Striga asiatica, a parasitic plant, uses a specific quinone molecule to trigger haustorium development. This signal molecule controls the transition from vegetative growth to parasitic attachment in this important crop pest.

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Area of Science:

  • Plant biology
  • Parasitic plant research
  • Developmental biology

Background:

  • Striga asiatica is an obligate parasite of major grain crops.
  • Parasitic development involves root meristem differentiation into a haustorium for host attachment.

Purpose of the Study:

  • To identify the signal molecule inducing parasitic development in Striga asiatica.
  • To understand the conditions required for haustorium formation and parasitic transition.

Main Methods:

  • In vitro culture of Striga asiatica.
  • Exposure to 2,6-dimethoxy-p-benzo-quinone at varying concentrations and durations.

Main Results:

  • A low molecular weight signal molecule, 2,6-dimethoxy-p-benzo-quinone, induced haustorium formation.

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  • Specific concentration (10^-6 M) and exposure time (>6 hours) were critical for complete development.
  • Shorter exposure led to aborted haustoria and reestablished meristematic elongation, allowing for subsequent haustorium development.

    • Conclusions:

    • The quinone signal molecule is key to initiating the parasitic phase in Striga asiatica.
    • This signaling pathway offers insights into controlling plant cellular development and parasitic plant interactions.