Department of Botany, University of Illinois, Urbana, Illinois 61801.
Plant Physiol. 1977 May;59(5):1000-3. doi: 10.1104/pp.59.5.1000.
The cellular adjustment of the pH of the external environment of soybean (Glycine max) hypocotyl elongating cells, frequently assumed to be hydrogen ion secretion when the pH is lowered, is unaffected by auxin. These elongating cells actively adjust the external hydrogen ion concentration (from any pH in the range of 4-8) to pH 5.4 + 0.2. This pH adjustment occurs in a medium which does not contain potassium. Growth-optimum auxin concentrations have no effect on cellular pH adjustment of the external medium, whether added at the beginning of the experiment or after the equilibrium pH is attained. The pH adjustment by the cells occurs rapidly and in spite of the presence of a cuticle.
大豆下胚轴伸长细胞对外环境 pH 值的细胞调节，通常在 pH 值降低时被认为是氢离子分泌，但生长素对此没有影响。这些伸长细胞主动将外部氢离子浓度（在 4-8 的范围内的任何 pH 值）调节至 pH5.4+0.2。这种 pH 值调节发生在不含有钾的介质中。在实验开始时或达到平衡 pH 值后添加的最适生长浓度的生长素对细胞对外介质的 pH 值调节没有影响。细胞的 pH 值调节发生得很快，尽管存在角质层。
