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. 1972 Jul;50(1):125–131. doi: 10.1104/pp.50.1.125

Effects of Ethylene and 2,4-Dichlorophenoxyacetic Acid on Cellular Expansion in Pisum sativum1

Akiva Apelbaum a,2, Stanley P Burg b
PMCID: PMC367327  PMID: 16658106

Abstract

Ethylene inhibits growth in the subhook region of intact etiolated pea seedlings (Pisum sativum, var. Alaska) by reducing the capacity of the polar auxin transport system supplying auxin to the tissue. Application of 0.1 mm 2,4-dichlorophenoxyacetic acid reverses the growth inhibition caused by ethylene, and stimulates formation of sufficient gas to induce a swelling response in the absence of applied ethylene. Added ethylene causes a further swelling response but no change in growth rate when 0.1 mm 2,4-dichlorophenoxyacetic acid is present. If ethylene produced in response to 0.1 mm 2,4-dichlorophenoxyacetic acid is removed by hypobaric conditions, tissue swelling is prevented but the growth rate is not altered. Reducing the pressure also does not affect the growth rate of control plants. A higher concentration of 2,4-dichlorophenoxyacetic acid (1 mm) acts in a similar manner except that it also depresses growth through direct herbicidal action, whereas 0.1 mm 2,4-dichlorophenoxyacetic acid stimulates growth. Applied and auxin-induced ethylene prolong the phase of cellular expansion in both etiolated and light-grown seedlings. As long as ethylene is present, growth continues, glucose is incorporated into the cell wall, and the wall weight increases in proportion to tissue fresh weight. When ethylene is removed, glucose incorporation into the cell wall decreases and growth ceases.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Abeles F. B., Rubinstein B. Regulation of Ethylene Evolution and Leaf Abscission by Auxin. Plant Physiol. 1964 Nov;39(6):963–969. doi: 10.1104/pp.39.6.963. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Apelbaum A., Burg S. P. Altered Cell Microfibrillar Orientation in Ethylene-treated Pisum sativum Stems. Plant Physiol. 1971 Nov;48(5):648–652. doi: 10.1104/pp.48.5.648. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Apelbaum A., Burg S. P. Effect of Ethylene on Cell Division and Deoxyribonucleic Acid Synthesis in Pisum sativum. Plant Physiol. 1972 Jul;50(1):117–124. doi: 10.1104/pp.50.1.117. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Baker D. B., Ray P. M. Relation between Effects of Auxin on Cell Wall Synthesis and Cell Elongation. Plant Physiol. 1965 Mar;40(2):360–368. doi: 10.1104/pp.40.2.360. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Beyer E. M., Morgan P. W. Ethylene modification of an auxin pulse in cotton stem sections. Plant Physiol. 1969 Dec;44(12):1690–1694. doi: 10.1104/pp.44.12.1690. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Burg S. P., Burg E. A. The interaction between auxin and ethylene and its role in plant growth. Proc Natl Acad Sci U S A. 1966 Feb;55(2):262–269. doi: 10.1073/pnas.55.2.262. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Kang B. G., Newcomb W., Burg S. P. Mechanism of Auxin-induced Ethylene Production. Plant Physiol. 1971 Apr;47(4):504–509. doi: 10.1104/pp.47.4.504. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Nitsan J., Lang A. Inhibition of cell division and cell elongation in higher plants by inhibitors of DNA synthesis. Dev Biol. 1965 Dec;12(3):358–376. doi: 10.1016/0012-1606(65)90003-5. [DOI] [PubMed] [Google Scholar]
  9. Valdovinos J. G., Ernest L. C., Henry E. W. Effect of ethylene and gibberellic Acid on auxin synthesis in plant tissues. Plant Physiol. 1967 Dec;42(12):1803–1806. doi: 10.1104/pp.42.12.1803. [DOI] [PMC free article] [PubMed] [Google Scholar]

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