Occurrence of auxotrophic variants among bacteria of Enterobacteriaceae family isolated from water objects of the north-west of the Murmansk region

Arctic Biomonitoring

Zatsarinnaya, E.A.^1 ; Kalchugina, V.D.^2 ; Kolupaeva, N.V.^1

Scientific Laboratory of Evolutionary Ecology, Ryazan State University Named by S. A. Esenin, 46 Svobody st, Ryazan

390000, Russia^1

Institute of Environmental and Agricultural Biology (X-Bio), University of Tyumen, 6 Volodarskogo St., Tyumen

625003, Russia^2

关键词: Biosynthetic gene;    Citrobacter freundii;    Enterobacteria;    Enterobacteriaceae;    Klebsiella oxytoca;    Nutrient contents;    Survival of bacteria;    Thermotolerant coliform bacteria;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/263/1/012036/pdf
DOI  :  10.1088/1755-1315/263/1/012036

来源: IOP

【 摘 要 】

In the last decade, interest in the problem of survival of bacteria with the loss of biosynthetic genes in environments with low nutrient content has increased markedly. The phenomenon of auxotrophy among bacteria living in nutrient-rich environments is well studied. However, information about the requirements of growth factors for saprophytic microorganisms is presently inadequate. The question of the ability of auxotrophs to survive in out-organism environments remains open. The results of the study show that both the representation of Enterobacteriaceae and the prevalence of auxotrophic forms among them varied significantly in the waters of the northwestern Murmansk region. The rivers Menikkajoki, Kolosjoki and Kuvernerinjoki are characterized by the highest enterobacteria concentrations. Thermotolerant coliform bacteria were not found in the samples. The occurrence of auxotrophic variants of Enterobacteriaceae was quite high - 48.5% (n = 163). Auxotrophs most often were isolates of Enterobacter spp. (28.4%) and Citrobacter freundii (21.6%), rarely - Hafnia alver, Klebsiella mobilis, Klebsiella oxytoca Citrobacter kosery.