Various physico-chemical stress factors cause prophage induction in Nitrosospira multiformis 25196--an ammonia oxidizing bacteria

Water Research
Jeongdong ChoiRamesh Goel

Abstract

Bacteriophages are viruses that infect bacteria and contribute significant changes in the overall bacterial community. Prophages are formed when temperate bacteriophages integrate their DNA into the bacterial chromosome during the lysogenic cycle of the phage infection to bacteria. The prophage (phage DNA integrated into bacterial genome) on the bacterial genome remains dormant, but can cause cell lysis under certain environmental conditions. This research examined the effect of various environmental stress factors on the ammonia oxidation and prophage induction in a model ammonia oxidizing bacteria Nitrosospira multiformis ATCC 25196. The factors included in the study were pH, temperature, organic carbon (COD), the presence of heavy metal in the form of chromium (VI) and the toxicity as potassium cyanide (KCN). The selected environmental factors are commonly encountered in wastewater treatment processes, where ammonia oxidizing bacteria play a pivotal role of converting ammonia into nitrite. All the factors could induce prophage from N. multiformis demonstrating that cell lysis due to prophage induction could be an important mechanism contributing to the frequent upset in ammonia oxidation efficiency in full scale treatment pl...Continue Reading

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Citations

Jul 29, 2015·BMC Genomics·Tasha M Santiago-RodriguezDavid T Pride
Nov 6, 2013·FEMS Microbiology Reviews·Carlo VitiLuciana Giovannetti
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Aug 14, 2020·MSystems·Catherine M MageeneyKelly P Williams
Jun 29, 2021·Applied Microbiology and Biotechnology·Ruyin LiuXinchun Liu

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