The effect of magnesium on the growth and cell division of various bacterial species in complex media.
The effect of magnesium on the growth and cell division of various bacterial species in complex media.
复制标题
镁对复杂培养基中各种细菌生长和细胞分裂的影响。
DOI：
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发表时间：
1949
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：镁对于复杂培养基中杆菌的正常细胞分裂是必不可少的。在镁缺乏或镁过量的条件下，细胞分裂被抑制，并且可以形成丝状细胞。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量明显大于革兰氏阴性菌，这可能是因为前者将镁结合到革兰氏复合物的结构中。摘要：在以前的一份来文中（Webb. 1948 a）表明镁对魏氏梭菌的正常细胞分裂是必需的。在复杂的媒体缺乏离子镁，CI。Welchii以长丝状体的形式生长，当在含有0.0015%（w/v）镁离子的培养基中传代培养时，其恢复为正常形态的细胞。在扩展这些研究中，已经确定了镁对复杂培养基中各种其他细菌物种的生长和分裂的影响。这里描述的结果表明，镁对于所研究的所有杆状细菌的正常细胞分裂是必不可少的，但是革兰氏阳性和革兰氏阴性生物体的镁需求之间存在根本差异。2.镁对复合体系中不同菌种生长和细胞分裂的影响。
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.