The Influence of Magnesium on Cell Division
The Influence of Magnesium on Cell Division
复制标题
镁对细胞分裂的影响
DOI：
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发表时间：
1948
期刊：
影响因子：
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通讯作者：
M. Webb
中科院分区：
文献类型：
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作者：
M. Webb
摘要：镁对复杂培养基中杆菌的正常细胞分裂至关重要。在镁缺乏或镁过量的情况下，细胞分裂受到抑制，丝状细胞可能形成。在相同条件下，对染色质体的分裂没有明显的干扰。革兰氏阳性菌对镁的需求比革兰氏阴性菌要大得多，这可能是因为革兰氏阳性菌将镁融入到革兰氏复合物的结构中。
SUMMARY: Magnesium is essential for the normal cell division of bacilli in complex media. Under conditions of magnesium deficiency or magnesium excess, cell division is inhibited and filamentous cells may be formed. Under the same conditions there is no appreciable interference with the division of chromatinic bodies. The magnesium requirements of the Gram-positive bacteria are considerably greater than those of the Gram-negative bacteria, possibly because the former incorporate magnesium into the structure of the Gram complex.
SUMMARY: In a previous communication (Webb. 1948 a) it was shown that magnesium was essential for the normal cell division of Clostridium welchii. In complex media deficient in ionic magnesium, CI. welchii grew in the form of long filaments, which reverted to cells of normal morphology when subcultured in a medium containing 0.0015 % (w/v) magnesium ion. In extending these studies, the influence of magnesium on the growth and division of various other species of bacteria in complex media has been determined. The results, described here, suggest that magnesium is essential for the normal cell division of all the rod-shaped bacteria studied, but that fundamental differences exist between the magnesium requirements of Gram-positive and Gram-negative organisms. 2. The Effect of Magnesium on the Growth and Cell Division of Various Bacterial Species in Complex.