Enhanced calcium carbonate-biofilm complex formation by alkali-generating Lysinibacillus boronitolerans YS11 and alkaliphilic Bacillus sp. AK13.

ABSTRACT: Microbially induced calcium carbonate (CaCO₃) precipitation (MICP) is a process where microbes induce condition favorable for CaCO₃ formation through metabolic activities by increasing the pH or carbonate ions when calcium is near. The molecular and ecological basis of CaCO₃ precipitating (CCP) bacteria has been poorly illuminated. Here, we showed that increased pH levels by deamination of amino acids is a driving force toward MICP using alkalitolerant Lysinibacillus boronitolerans YS11 as a model species of non-ureolytic CCP bacteria. This alkaline generation also facilitates the growth of neighboring alkaliphilic Bacillus sp. AK13, which could alter characteristics of MICP by changing the size and shape of CaCO₃ minerals. Furthermore, we showed

SUBMITTER: Lee YS 

PROVIDER: S-EPMC6459448 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature