Stress relaxation of cell walls and the yield threshold for growth

@article{Cosgrove2004StressRO,
  title={Stress relaxation of cell walls and the yield threshold for growth},
  author={Daniel J. Cosgrove and Elizabeth Van Volkenburgh and Robert E. Cleland},
  journal={Planta},
  year={2004},
  volume={162},
  pages={46-54}
}
Theory predicts that, for growing plant cells isolated from a supply of water, stress relaxation of the cell wall should decrease cell turgor pressure (P) until the yield threshold for cell expansion is reached. This prediction was tested by direct P measurements of pea (Pisum sativum L.) stem cortical cells before and after excision of the growing region and isolation of the growing tissue from an external water supply. Cell P was measured with the micro-pressure probe under conditions which… Expand
Wall yield threshold and effective turgor in growing bean leaves
TLDR
Values of P, Y and Pe have been measured in growing bean leaves with an isopiestic psychrometer, using the stress-relaxation method to derive Y and point out the importance of determining Pe, rather than just P, when relating cell turgor to the growth rate. Expand
Control of the rate of cell enlargement: Excision, wall relaxation, and growth-induced water potentials
TLDR
A theory is presented for simultaneously evaluating the effects of water supply and water demand associated with growth by using a new guillotine thermocouple psychrometer to make continuous measurements of water potential before and after the excision of elongating and mature regions of darkgrown soybean stems. Expand
WALL RELAXATION IN ELONGATING TISSUES
Reported differences in the relaxation of cell walls in enlarging stem tissues of soybean (Glycine max [L.] Merr.) and pea (Pisum sativum L.) cause measurements of the yield threshold turgor, anExpand
Growth at reduced turgor: irreversible and reversible cell-wall extension of maize coleoptiles and its implications for the theory of cell growth
TLDR
The finding that auxin promotes cryptic growth supports the notion that a wall-stiffening process is a constitutive component of the mechanism by which the hormone induces irreversible cell elongation. Expand
Wall relaxation in growing stems: comparison of four species and assessment of measurement techniques
TLDR
Improved methods for measuring in-vivo stress relaxation of growing tissues and to compare relaxation in the stems of four different species were developed, with similar results when applied to the growing stems. Expand
Limitation of Cell Elongation in Barley (Hordeum vulgare L.) Leaves Through Mechanical and Tissue-Hydraulic Properties.
TLDR
Assessment of mechanical and hydraulic limitation of growth in leaf epidermal cells of barley in response to agents which affect cellular water and potassium transport, pump activity of plasma membrane H(+)-ATPase and wall acidification showed that growth in all except the FC treatment was co-limited through hydraulic and mechanical properties, though to various extents. Expand
Direct Measurements of Cell Turgor and Hydraulic Conductance in Expanding Tulip Tepals
TLDR
When the hydraulic conductance of intact growing tepal tissues was calculated by dividing the growth-induced water potentials by the relative growth rates at the steady states, it was found that the hydraulic Conductance was significantly decreased by trehalose feeding. Expand
Phloem water relations and root growth
TLDR
It is concluded that a significant proportion of the water for cell expansion can enter growing root cells through the phloem, and the plasmodesmata are identified as the major control point of solute flux along the symplastic pathway. Expand
Biomechanics of plant growth.
  • P. Schopfer
  • Biology, Medicine
  • American journal of botany
  • 2006
TLDR
The significance of cell wall architecture for allometric growth can be demonstrated by disturbing the oriented deposition of wall polymers with microtubule-interfering drugs such as colchicine. Expand
Auxin action on growth in intact plants: Threshold turgor is regulated
TLDR
It was concluded that auxin acts mainly on the metabolism of the cell walls manifested by the change in growth rate and threshold turgor, which were passive responses to the changed growth rate. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 36 REFERENCES
Water potentials induced by growth in soybean hypocotyls.
TLDR
It is concluded that growth-induced water potentials reflect the local activity for cell enlargement and are supported by appropriate osmotic potentials. Expand
Control of Cell Elongation in Nitella by Endogenous Cell Wall pH Gradients: MULTIAXIAL EXTENSIBILITY AND GROWTH STUDIES.
TLDR
Since the inner 25% of the wall controls extensibility, it is concluded that growth in the acid band is caused by the action of protons on the wall, well within the threshold of acid-enhanced creep. Expand
Osmotic properties of pea internodes in relation to growth and auxin action.
TLDR
The internal gradient in water potential (from the xylem to the epidermis) needed to sustain cell enlargement is small and the hydraulic conductance of the tissue is sufficiently large that it does not control or limit the rate of cell enlargements. Expand
Control of light-induced bean leaf expansion: Role of osmotic potential, wall yield stress, and hydraulic conductivity
TLDR
It is concluded that light does not induce cell enlargement in the leaf by altering any of the above parameters, but does so primarily by increasing wall extensibility. Expand
An analysis of irreversible plant cell elongation.
  • J. Lockhart
  • Biology, Medicine
  • Journal of theoretical biology
  • 1965
TLDR
A model for plant cell elongation has been developed from rate equations for osmotic uptake of water and irreversible expansion of the cell wall, and the derived formulations predict growth curves comparable to those observed experimentally. Expand
Growth-induced Water Potentials in Plant Cells and Tissues.
  • F. Molz
  • Medicine, Chemistry
  • Plant physiology
  • 1978
TLDR
The close correspondence between predicted and measured water potentials in growing tissue indicates that significant gradients in water potential are required to move growth-associated water through and around cells over macroscopic distances. Expand
Solutes in the free space of growing stem tissues.
TLDR
A significant osmotic pressure in the wall space offers an explanation for the frequent observation that nontranspiring plants have negative water potentials and calculations of hydraulic resistance from water potential data must take into account solutes in the free space. Expand
Wall Extensibility: Hormones and Wall Extension
Plant cells can undergo striking amounts of cell elongation. For example, a cell initially 20 to 30 μ in length can end up over 2000 times as long (Bannon 1964). During elongation there must be aExpand
Osmotic Behavior of Oat Coleoptile Tissue in Relation to Growth
Efforts were made to estimate the water potential difference that is required, between rapidly growing oat coleoptile cylinders and dilute medium, to support the rate of water uptake involved inExpand
Auxin increases the hydraulic conductivity of auxin-sensitive hypocotyl tissue
The ability of water to enter the cells of growing hypocotyl tissue was determined in etiolated soybean (Glycine max (L.) Merr.) seedlings. Water uptake was restricted to that for cell enlargement,Expand
...
1
2
3
4
...