大肠杆菌P1、P2和Mu溶原菌的生殖适应性。
Reproductive fitness of P1, P2, and Mu lysogens of Escherichia coli.
作者信息
Edlin G, Lin L, Bitner R
出版信息
J Virol. 1977 Feb;21(2):560-4. doi: 10.1128/JVI.21.2.560-564.1977.
Abstract
P1, P2, and Mu lysogens of Escherichia coli reproduce more rapidly than nonlysogens during aerobic growth in glucose-limited chemostats. Thus, prophage-containing stains of E. coli are reproductively more fit than the corresponding nonlysogens. If mixed populations are grown by serial dilution under conditions in which growth is not limited, both the lysogen and nonlysogen manifest identical growth rates. The increased fitness of the lysogens in glucose-limited chemostats correlates with a higher metabolic activity of the lysogen as compared with the nonlysogen during glucose exhaustion. We propose that P1, P2, Mu, and lambda prophage all confer an evolutionarily significant reproductive growth advantage to E. coli lysogenic strains.
摘要
在葡萄糖受限的恒化器中进行需氧生长时，大肠杆菌的P1、P2和Mu溶原菌比非溶原菌繁殖得更快。因此，含有原噬菌体的大肠杆菌菌株在繁殖上比相应的非溶原菌更具适应性。如果在生长不受限的条件下通过连续稀释培养混合菌群，溶原菌和非溶原菌的生长速率表现相同。与非溶原菌相比，溶原菌在葡萄糖受限的恒化器中适应性增强与葡萄糖耗尽期间溶原菌更高的代谢活性相关。我们提出，P1、P2、Mu和λ原噬菌体都赋予大肠杆菌溶原菌株在进化上具有显著意义的繁殖生长优势。
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