大肠杆菌营养状况改善期间的细胞分裂
Cell division during nutritional upshifts of Escherichia coli.
作者信息
Loeb A, McGrath B E, Navre J M, Pierucci O
出版信息
J Bacteriol. 1978 Nov;136(2):631-7. doi: 10.1128/jb.136.2.631-637.1978.
Abstract
Nutritional shifts of Escherichia coli B/r to richer media have been analyzed is synchronously growing and exponential-hase populations. Early perturbations in the timing of cell division were observed. At the slow growth, division progressed at a rate equal to or less than the preshift rate for about 1 h. At intermediate growth, both delays and acceleration in division were observed. The extent of the perturbation depended upon the age of the cells at the time of the shift and the composition of the preshift and postshift media. The perturbation was different in the two substrains of E. coli B/r used in this study.
摘要
对处于同步生长和指数生长期的大肠杆菌B/r向营养更丰富的培养基的营养转变进行了分析。观察到细胞分裂时间的早期扰动。在缓慢生长时，分裂以等于或低于转移前速率的速度进行约1小时。在中等生长时，观察到分裂延迟和加速。扰动的程度取决于转移时细胞的年龄以及转移前和转移后培养基的组成。在本研究中使用的大肠杆菌B/r的两个亚菌株中，扰动有所不同。
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