Growth, Pressure, and Wall Stress in Epidermal Cells of Begonia argenteo- guttata L. Leaves during Development

  title={Growth, Pressure, and Wall Stress in Epidermal Cells of Begonia argenteo- guttata L. Leaves during Development},
  author={Marcelo D. Serpe and Mark Allen Matthews},
  journal={International Journal of Plant Sciences},
  pages={291 - 301}
  • M. Serpe, M. Matthews
  • Published 1 May 1994
  • Environmental Science
  • International Journal of Plant Sciences
Conventional growth-turgor analyses of wall yielding do not take into account developmental changes in tissue and cell geometry that could significantly alter the force on and stress borne by expanding walls. To ascertain the role of wall stress in the decline in growth during leaf maturation, we analyzed the relation between leaf elongation and epidermal turgor (Pe), and the leaf and cell wall cross-sectional areas at three different stages of leaf development. As Begonia leaves elongated from… 
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1 Development of the Leaf Epidermis
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It is concluded that linear relationships between P and adjusted growth rates are not necessarily indicative of constant wall-yielding properties, and these relationships may reflect the effect of P on wall-loosening processes.
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It has been shown that rapid growth is always accompanied by the existence of longitudinal tissue stresses, and a method has been developed to measure tissue stresses directly as force per unit cross-sectional area.
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The results indicate that the expansion rate of leaves may not be strongly related to the turgor of the leaf cells, and that substantial control of leaf expansion rate, despite changes in turgors, may be part of normal plant function.
Cell Wall Texture Along The Growth Gradient OF The Mung Bean Hypocotyl: Ordered Assembly and Dissipative Processes
The results indicate that apparently conflicting concepts proposed in the literature, for the organization of the wall during cell elongation, are not mutually exclusive in the tissues studied.
Wall extensibility and cell hydraulic conductivity decrease in enlarging stem tissues at low water potentials.
The plastic properties of the cell walls and the conductance of the cells to water were decreased at low psi(w) but that the elastic Properties of the walls were of little consequence in this response and theory was developed to relate the wall measurements to those with the psychrometer.
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The results indicate that theLow water potential treatment caused large changes in cell wall yielding properties that contributed to the maintenance of root elongation and the ability to adjust cell wall properties in response to low water potential may decrease with cell development.
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