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Related Experiment Videos

Ethylene in plant growth.

S P Burg1

  • 1The Fairchild Tropical Garden, and University of Miami, Miami, Florida 33156.

Proceedings of the National Academy of Sciences of the United States of America
|February 1, 1973
PubMed
Summary

Ethylene, a plant hormone, inhibits growth and cell division in meristems. It also regulates dormancy, tropisms, and fruit ripening, with its production influenced by auxin and light.

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Effect of Ethylene on Cell Division and Deoxyribonucleic Acid Synthesis in Pisum sativum.

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Area of Science:

  • Plant Physiology
  • Molecular Biology
  • Biochemistry

Background:

  • Ethylene is a crucial plant hormone regulating numerous growth and developmental processes.
  • Understanding ethylene's mechanisms is key to manipulating plant development.

Purpose of the Study:

  • To elucidate the multifaceted roles of ethylene in plant growth and development.
  • To detail the molecular and physiological mechanisms underlying ethylene action and production.

Main Methods:

  • Analysis of ethylene's effects on cell division, DNA synthesis, and growth in various plant tissues.
  • Investigation of ethylene's impact on polar auxin transport and tropistic responses.
  • Examination of ethylene's role in dormancy, flowering, and fruit ripening.

Main Results:

  • Ethylene inhibits meristematic growth, DNA synthesis, and cell division but not RNA synthesis.
  • Ethylene breaks apical dominance by inhibiting polar auxin transport and influences dormancy release.
  • Ethylene affects cell expansion, tropisms, abscission, flowering, and fruit ripening, with its production regulated by auxin and red light.

Conclusions:

  • Ethylene acts as a potent regulator of plant growth, development, and stress responses.
  • Ethylene's action involves noncovalent binding to a metal-containing receptor, requiring O(2) and inhibited by CO(2).
  • Ethylene biosynthesis from methionine involves copper-dependent enzymes and oxygen-requiring steps.

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