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Related Experiment Videos

Does light inhibit ethylene production in leaves?

P K Bassi1, M S Spencer

  • 1Department of Plant Science, University of Alberta, Edmonton, Alberta T6G 2P5 Canada.

Plant Physiology
|November 1, 1983
PubMed
Summary

Light

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Area of Science:

  • Plant Physiology
  • Biochemistry

Background:

  • Ethylene production is a critical plant hormone regulating growth and stress responses.
  • Light's influence on ethylene biosynthesis is complex and may vary with experimental conditions.

Purpose of the Study:

  • To investigate the impact of light on ethylene production rates in different plant species.
  • To compare ethylene production measurements using leaf segments in closed systems versus intact plants in open systems.

Main Methods:

  • Monitored ethylene production in sunflower, tomato, and soybean under varying light conditions.
  • Utilized two techniques: leaf segments in closed flasks and intact plants in a flow-through system.
  • Applied 1-aminocyclopropane-1-carboxylic acid (ACC) in some experiments.

Main Results:

  • Light strongly inhibited ethylene production in ACC-treated leaf segments within closed flasks for all species.
  • Light had only a marginal effect on ethylene production in intact plants treated with ACC in an open system.
  • In distilled water, light promoted ethylene production in sunflower and soybean leaf segments, but not in tomato.

Conclusions:

  • The observed light inhibition of ethylene production in closed systems with ACC is likely an artifact of the methodology.
  • Light has minimal impact on ethylene production in intact plants when measured in an open, flow-through system.

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