Two endogenous proteins that induce cell wall extension in plants.

@article{McQueenMason1992TwoEP,
  title={Two endogenous proteins that induce cell wall extension in plants.},
  author={S. McQueen-Mason and D. Durachko and D. Cosgrove},
  journal={The Plant cell},
  year={1992},
  volume={4},
  pages={
          1425-33
        }
}
Plant cell enlargement is regulated by wall relaxation and yielding, which is thought to be catalyzed by elusive "wall-loosening" enzymes. By employing a reconstitution approach, we found that a crude protein extract from the cell walls of growing cucumber seedlings possessed the ability to induce the extension of isolated cell walls. This activity was restricted to the growing region of the stem and could induce the extension of isolated cell walls from various dicot stems and the leaves of… Expand
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An oat coleoptile wall protein that induces wall extension in vitro and that is antigenically related to a similar protein from cucumber hypocotyls
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  • Biology, Medicine
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  • 1996
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Isolation of cell wall proteins from Medicago sativa stems.
TLDR
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Role of Expansin in Cell Enlargement of Oat Coleoptiles (Analysis of Developmental Gradients and Photocontrol)
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It is suggested that changes in the susceptibility of the wall to expansin action, rather than changes in expansin activity, may be a key determinant of the growth patterns in oat coleoptiles. Expand
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The Acid Growth Theory, which states that when exposed to auxin, susceptible cells excrete protons into the wall (apoplast) at an enhanced rate, resulting in a decrease in apoplastic pH, activates wall-loosening processes, the precise nature of which is unknown. Expand
Wall‐protein antibodies as inhibitors of growth and of autolytic reactions of isolated cell wall
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The evidence suggests that enzyme mobility may be critical in the autolytic hydrolytsis of plant cell wall. Expand
Inhibition of auxin-induced cell elongation of maize coleoptiles by antibodies specific for cell wall glucanases.
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The results support the contention that enzymatic processes mediated by exo- and endoglucanases are responsible for cell wall autolytic reactions and that these reactions are linked to the mechanism for expressing auxin induced cell elongation in maize coleoptiles. Expand
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In Vigna radiata (L.) Wilczeck hypocotyl, the maximal growth zone is located right under the hook and moves 5 mm lowe exogenous auxin. A good correlation has been obtained between the magnitude ofExpand
Wall extensibility, wall pH and tissue osmolality: significance for auxin and ethylene‐enhanced petiole growth in semi‐aquatic plants
TLDR
It is shown that auxin but not ethylene increases the in vitro extensibility of cell walls, which appears to differ in the semi-aquatic plants Regnellidium diphyllum and Nymphoides peltata. Expand
Structural features of cell-wall polysaccharides of onion Allium cepa
Abstract Cell-wall material has been isolated from immature onion tissues and extracted in sequence with cyclohexane- trans -1,2-diaminetetra-acetate (CDTA) at 20°, 0.05 m Na 2 CO 3 at 1°, 0.05 m NaExpand
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TLDR
It is concluded that endo-xyloglucan transferase functions as a reconnecting enzyme for xylglucans and is involved in the interweaving or reconstruction of cell wall matrix, which is responsible for chemical creepage that leads to morphological changes in the cell wall. Expand
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TLDR
The results indicate that creep depends on relatively rugged enzymes that are firmly attached to or entangled in the wall, and indicates that thiol reduction of wall enzymes might provide a control mechanism for endogenous cell growth. Expand
An in vitro system that simulates plant cell extension growth.
TLDR
The results indicate that cell wall synthesis is not required for rapid cell extension, and suggest that wall extension may be controlled by acid-labile, alkali-stable cell wall bonds. Expand
pH-Dependence of Extension Growth in Avena Coleoptiles and Its Implications for the Mechanism of Auxin Action.
TLDR
It is concluded that true acid-induced wall-loosening generally does not take place above pH 5.0 and that a pH considerably below 4.0 is required in order to stimulate growth to an extent comparable to that obtained in response to auxin. Expand
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