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Does Growth Correlate with Turgor-Induced Elastic Strain in Stems? A Re-Evaluation of de Vries' Classical Experiments
Plant Physiology (2001)
  • Winfried S. Peters
  • Maggie S. Farm
  • A. Jim Kopf
Abstract
The correlation between growth and turgor-induced elastic expansion was studied in hypocotyls of sunflower (Helianthus annuus) seedlings under various growth conditions. Turgor-induced elastic cell wall strain was greater in hypocotyls of faster growing seedlings, i.e. in etiolated versus light-grown ones. It also was higher in rapidly growing young seedlings as compared with nongrowing mature ones. However, analysis of the spatial distribution of elastic strain and growth demonstrated that their correspondence was only apparent. Profiles of elastic strain declined steadily from the top of the hypocotyls toward the basis, whereas the profiles of relative elemental growth rate along the hypocotyls showed maxima within the growing zones. In contrast to earlier hypotheses, we conclude that turgor-induced elastic cell wall strain and growth do not correlate precisely in growing hypocotyls.
Keywords
  • biomechanics,
  • growth,
  • kinematic growth analysis,
  • relative elemental growth rate,
  • tissue tension,
  • elastic strain,
  • cell wall
Publication Date
April 1, 2001
Citation Information

Winfried S. Peters, Maggie S. Farm, and A. Jim Kopf. Does Growth Correlate with Turgor-Induced Elastic Strain in Stems? A Re-Evaluation of de Vries' Classical Experiments. Plant Physiology (2001) 125: 2173-2179.

doi: 10.1104/pp.125.4.2173