Defining lower limits of biodegradation: atrazine degradation regulated by mass transfer and maintenance demand in Arthrobacter aurescens TC1.

ABSTRACT: Exploring adaptive strategies by which microorganisms function and survive in low-energy natural environments remains a grand goal of microbiology, and may help address a prime challenge of the 21st century: degradation of man-made chemicals at low concentrations ("micropollutants"). Here we explore physiological adaptation and maintenance energy requirements of a herbicide (atrazine)-degrading microorganism (Arthrobacter aurescens TC1) while concomitantly observing mass transfer limitations directly by compound-specific isotope fractionation analysis. Chemostat-based growth triggered the onset of mass transfer limitation at residual concentrations of 30 μg L^-1 of atrazine with a bacterial population doubling time (t_d) of 14 days, whereas exacerbated energy limitation

SUBMITTER: Kundu K 

PROVIDER: S-EPMC6776027 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature