膨压对细胞分裂和细胞增大的调控。
Regulation of cell division and cell enlargement by turgor pressure.
机构信息
Department of Soil Science and Department of Botany, University of Wisconsin, Madison, Wisconsin 53706.
出版信息
Plant Physiol. 1972 Jun;49(6):961-2. doi: 10.1104/pp.49.6.961.
Abstract
Isolated radish (Raphanus sativus L., var. Red Prince) cotyledons were incubated in growth medium plus graded concentrations of mannitol (-1 to -16 bars) for 28 hours. At the end of the incubation period, turgor pressures were measured using thermocouple psychrometers. Cell division, as measured by DNA increase, was greatly stimulated by increasing turgor from 5 to 6 bars. Cell enlargement was stimulated as turgor increased above 3 bars. The critical turgor pressure for increased cell division thus appeared significantly greater than that for increased cell enlargement.
摘要
将萝卜（Raphanus sativus L.，变种 Red Prince）子叶在生长培养基中加入不同浓度甘露醇（-1 至-16 巴）培养 28 小时。培养结束时，使用热电偶湿度计测量膨压。由 DNA 增加测量的细胞分裂，随着膨压从 5 巴增加到 6 巴而大大受到刺激。当膨压增加到 3 巴以上时，细胞增大受到刺激。因此，增加细胞分裂的临界膨压明显大于增加细胞增大的临界膨压。
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