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- Title
Acid-induced elongation of Reynoutria stems requires tissue stresses.
- Authors
Hejnowicz, Z.; Sievers, A.
- Abstract
Measurements of the elongation rate of strips of outer tissue composed of epidermis and collenchyma, peeled from the elongating internodes of Reynoutria japonica Houtt. (Japanese knotweed) and stretched in buffer, showed that the rate depended on pH and the stretching force, At pH 6.8, elongation was barely perceptible in the force range studied, but the rate of elongation increased rapidly with the force at pH 5.0 (acid-induced elongation). The yield threshold stress at pH 5.0 amounted to 1.8x106 N m-2. it was three times higher than the osmotic pressure in the outer tissue, but was Lower than the average tensile tissue stress in this tissue in intact stems. We infer that tensile tissue stress in the outer tissue is required for the manifestation of acid-induced elongation of this tissue in situ.
- Subjects
PLANT growth; EFFECT of acids on plants; JAPANESE knotweed; EPIDERMIS; PLANT tissue culture; CULTURES (Biology)
- Publication
Physiologia Plantarum, 1996, Vol 98, Issue 2, p345
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1034/j.1399-3054.1996.980216.x