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. 1968 Mar;43(3):359–364. doi: 10.1104/pp.43.3.359

Protein Synthesis in Abscission: The Distinctiveness of the Abscission Zone and its Response to Gibberellic Acid and Indoleacetic Acid

Lowell N Lewis 1, Jagdish C Bakhshi 1,1
PMCID: PMC1086846  PMID: 16656771

Abstract

Abscission zone tissue of citrus was shown to have a higher rate of protein synthesis than tissue distal or proximal to it, based on the incorporation of leucine-1-14C. The proximal tissue had the slowest rate of protein synthesis. As the tissue approached abscission, the rate of synthesis in the abscission zone decreased and the differences in rate of protein synthesis between the 3 zones almost disappeared. IAA, which delayed abscission, maintained the protein synthesis gradient between the abscission and proximal zones, but the distal zone tissue was as active in protein synthesis as the abscission zone. Differences in uptake of the leucine were also observed between different zones and treatments. Regardless of the tissue or the treatment, there was a sharp increase in uptake at the 24 hour point.

Direct incubation of abscission zones in IAA and gibberellic acid (GA) indicated that the action of gibberellic acid on abscission is probably through a stimulation of protein synthesis, while IAA seems to act by maintaining the existing rate of protein synthesis in the cells of the abscission zone.

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Selected References

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

  1. Biggs R. H., Leopold A. C. Factors Influencing Abscission. Plant Physiol. 1957 Nov;32(6):626–632. doi: 10.1104/pp.32.6.626. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. 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]
  3. Chandra G. R., Varner J. E. Gibberellic acid-controlled metabolism of RNA in aleurone cells of barley. Biochim Biophys Acta. 1965 Dec 9;108(4):583–592. doi: 10.1016/0005-2787(65)90055-9. [DOI] [PubMed] [Google Scholar]
  4. Chrispeels M. J., Varner J. E. Gibberellic Acid-enhanced synthesis and release of alpha-amylase and ribonuclease by isolated barley and aleurone layers. Plant Physiol. 1967 Mar;42(3):398–406. doi: 10.1104/pp.42.3.398. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. EDELMAN J., HALL M. A. EFFECT OF GROWTH HORMONES ON THE DEVELOPMENT OF INVERTASE ASSOCIATED WITH CELL WALLS. Nature. 1964 Jan 18;201:296–297. doi: 10.1038/201296b0. [DOI] [PubMed] [Google Scholar]
  6. Lewis L. N., Bakhshi J. C. Interactions of indoleacetic Acid and gibberellic Acid in leaf abscission control. Plant Physiol. 1968 Mar;43(3):351–358. doi: 10.1104/pp.43.3.351. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Ockerse R., Siegel B. Z., Galston A. W. Hormone-induced repression of a peroxidase isozyme in plant tissue. Science. 1966 Jan 28;151(3709):452–453. doi: 10.1126/science.151.3709.452. [DOI] [PubMed] [Google Scholar]
  8. Varner J. E., Chandra G. R. HORMONAL CONTROL OF ENZYME SYNTHESIS IN BARLEY ENDOSPERM. Proc Natl Acad Sci U S A. 1964 Jul;52(1):100–106. doi: 10.1073/pnas.52.1.100. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Yager R. E. Possible Role of Pectic Enzymes in Abscission. Plant Physiol. 1960 Mar;35(2):157–162. doi: 10.1104/pp.35.2.157. [DOI] [PMC free article] [PubMed] [Google Scholar]

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