Horwitz A H, Casida L E
J Bacteriol. 1978 Nov;136(2):565-9. doi: 10.1128/jb.136.2.565-569.1978.
The L-form of Agromyces ramosus was stable in the absence of penicillin when transferred on heart infusion agar containing NaCl and serum. It reverted to its bacterial form, however, when magnesium replaced the serum in this medium. On a dilute medium containing NaCl but lacking serum, the L-form died out unless calcium, magnesium, or serum was added. It grew as the L-form in the presence of calcium of serum but reverted to the bacterial form in the presence of magnesium. Reversion also occurred when magnesium was added to the dilute medium containing serum. Calcium interfered with or prevented the magnesium-induced reversion. The revertant bacterial form resulting from these studies was not NaCl sensitive, as was the case of the bacterial revertant of this organism produced in soil (A. H. Horwitz and L. E. Casida, Jr., Can. J. Microbiol, 24:50--55, 1978).
当将分枝放线菌的L型转移至含有氯化钠和血清的心脏浸液琼脂上时，在没有青霉素的情况下它是稳定的。然而，当在该培养基中用镁替代血清时，它会回复到细菌形态。在含有氯化钠但缺乏血清的稀释培养基上，除非添加钙、镁或血清，否则L型会死亡。在有钙或血清存在时它以L型生长，但在有镁存在时会回复到细菌形态。当向含有血清的稀释培养基中添加镁时也会发生回复。钙会干扰或阻止镁诱导的回复。这些研究中产生的回复性细菌形态对氯化钠不敏感，而在土壤中产生的该生物体的细菌回复体则对氯化钠敏感（A. H. 霍维茨和L. E. 小卡西达，《加拿大微生物学杂志》，24:50 - 55，1978）。
