Acid-induced elongation of Reynoutria stems requires tissue stresses

摘要: Measurements of the elongation rate strips outer tissue composed epidermis and collenchyma, peeled from elongating internodes Reynoutria japonica Houtt. (Japanese knotweed) stretched in buffer, showed that depended on pH stretching force. At 6.8, was barely perceptible force range studied, but increased rapidly with at 5.0 (acid-induced elongation). The yield threshold stress amounted to 1.8×106 N m−2. It three times higher than osmotic pressure tissue, lower average tensile this intact stems. We infer is required for manifestation acid-induced situ.