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Plant Physiology logoLink to Plant Physiology
. 1997 Apr;113(4):1395–1404. doi: 10.1104/pp.113.4.1395

The Determination of Relative Elemental Growth Rate Profiles from Segmental Growth Rates (A Methodological Evaluation).

W S Peters 1, N Bernstein 1
PMCID: PMC158263  PMID: 12223680

Abstract

Relative elemental growth rate (REGR) profiles describe spatial patterns of growth intensity; they are indispensable for causal growth analyses. Published methods of REGR profile determination from marking experiments fall in two classes: the profile is either described by a series of segmental growth rates, or calculated as the slope of a function describing the displacement velocities of points along the organ. The latter technique is usually considered superior for theoretical reasons, but to our knowledge, no comparative methodological study of the two approaches is currently available. We formulated a model REGR profile that resembles those reported from primary roots. We established the displacement velocity profile and derived growth trajectories, which enabled us to perform hypothetical marking experiments on the model with varying spacing of marks and durations of measurement. REGR profiles were determined from these data by alternative methods, and results were compared to the original profile. We find that with our model plotting of segmental relative growth rates versus segment position provides exact REGR profile estimations, if the initial segment length is less than 10% of the length of the whole growing zone, and if less than 20% of the growing zone is displaced past its boundary during the measurement. Based on our analysis, we discuss systematic errors that occur in marking experiments.

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Selected References

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  1. Ben-Haj-Salah H., Tardieu F. Temperature Affects Expansion Rate of Maize Leaves without Change in Spatial Distribution of Cell Length (Analysis of the Coordination between Cell Division and Cell Expansion). Plant Physiol. 1995 Nov;109(3):861–870. doi: 10.1104/pp.109.3.861. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Bernstein N., Lauchli A., Silk W. K. Kinematics and Dynamics of Sorghum (Sorghum bicolor L.) Leaf Development at Various Na/Ca Salinities (I. Elongation Growth). Plant Physiol. 1993 Dec;103(4):1107–1114. doi: 10.1104/pp.103.4.1107. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Green P. B. Pathways of cellular morphogenesis. A diversity in Nitella. J Cell Biol. 1965 Nov;27(2):343–363. doi: 10.1083/jcb.27.2.343. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Lockhart J. A. An interpretation of cell growth curves. Plant Physiol. 1971 Sep;48(3):245–248. doi: 10.1104/pp.48.3.245. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Macadam J. W., Nelson C. J., Sharp R. E. Peroxidase activity in the leaf elongation zone of tall fescue : I. Spatial distribution of ionically bound peroxidase activity in genotypes differing in length of the elongation zone. Plant Physiol. 1992 Jul;99(3):872–878. doi: 10.1104/pp.99.3.872. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Pahlavanian A. M., Silk W. K. Effect of temperature on spatial and temporal aspects of growth in the primary maize root. Plant Physiol. 1988 Jun;87(2):529–532. doi: 10.1104/pp.87.2.529. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Saab I. N., Sharp R. E., Pritchard J. Effect of inhibition of abscisic Acid accumulation on the spatial distribution of elongation in the primary root and mesocotyl of maize at low water potentials. Plant Physiol. 1992 May;99(1):26–33. doi: 10.1104/pp.99.1.26. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Salamon P., List A., Grenetz P. S. Mathematical Analysis of Plant Growth zea mays Primary Roots. Plant Physiol. 1973 Apr;51(4):635–640. doi: 10.1104/pp.51.4.635. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Schnyder H., Nelson C. J. Diurnal growth of tall fescue leaf blades : I. Spatial distribution of growth, deposition of water, and assimilate import in the elongation zone. Plant Physiol. 1988 Apr;86(4):1070–1076. doi: 10.1104/pp.86.4.1070. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Schnyder H., Nelson C. J., Spollen W. G. Diurnal Growth of Tall Fescue Leaf Blades : II. Dry Matter Partitioning and Carbohydrate Metabolism in the Elongation Zone and Adjacent Expanded Tissue. Plant Physiol. 1988 Apr;86(4):1077–1083. doi: 10.1104/pp.86.4.1077. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Sharp R. E., Silk W. K., Hsiao T. C. Growth of the maize primary root at low water potentials : I. Spatial distribution of expansive growth. Plant Physiol. 1988 May;87(1):50–57. doi: 10.1104/pp.87.1.50. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Silk W. K., Erickson R. O. Kinematics of plant growth. J Theor Biol. 1979 Feb 21;76(4):481–501. doi: 10.1016/0022-5193(79)90014-6. [DOI] [PubMed] [Google Scholar]
  13. Silk W. K., Walker R. C., Labavitch J. Uronide Deposition Rates in the Primary Root of Zea mays. Plant Physiol. 1984 Mar;74(3):721–726. doi: 10.1104/pp.74.3.721. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Spollen W. G., Sharp R. E. Spatial distribution of turgor and root growth at low water potentials. Plant Physiol. 1991 Jun;96(2):438–443. doi: 10.1104/pp.96.2.438. [DOI] [PMC free article] [PubMed] [Google Scholar]

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