PMID- 17391368 OWN - NLM STAT- MEDLINE DCOM- 20070803 LR - 20131121 IS - 0378-1097 (Print) IS - 0378-1097 (Linking) VI - 271 IP - 1 DP - 2007 Jun TI - Growth and physiological response of Arthrobacter protophormiae RKJ100 toward higher concentrations of o-nitrobenzoate and p-hydroxybenzoate. PG - 65-70 AB - Bioremediation of sites that are heavily contaminated with pollutant chemicals is a challenge as most of the microorganisms cannot tolerate higher concentrations of toxic compounds. Only a few strains of the genus Pseudomonas have been studied for their tolerance toward the higher concentrations of aromatic pollutant compounds, a phenomenon that is accompanied by various physiological changes. In the present study we have characterized the growth response and physiological changes (adaptations) of a Gram-positive bacterium, Arthrobacter protophormiae RKJ100, toward the higher concentrations of two aromatic compounds, viz. o-nitrobenzoate (ONB) and p-hydroxybenzoate (PHB). Arthrobacter protophormiae RKJ100 could utilize 30 mM ONB and 50 mM PHB as sole sources of carbon and energy. It was capable of growth on higher concentrations of ONB (up to 200 mM) and PHB (up to 150 mM) when the cells were pre-exposed to lower concentrations of these compounds. The adaptive responses shown by the organism during growth on higher concentrations of these compounds were evident from significant changes in cellular fatty acid profiles. In addition, Bacterial Adhesion To Hydrocarbon (BATH) assay and scanning electron microscopy showed substantial increase in cell surface hydrophobicity and decrease in cell size of A. protophormiae RKJ100 when grown on ONB and PHB as compared to succinate-grown cells. FAU - Sharma, Narinder K AU - Sharma NK AD - Institute of Microbial Technology, Sector-39A, Chandigarh 160036, India. FAU - Pandey, Janmejay AU - Pandey J FAU - Gupta, Nisha AU - Gupta N FAU - Jain, Rakesh K AU - Jain RK LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070328 PL - England TA - FEMS Microbiol Lett JT - FEMS microbiology letters JID - 7705721 RN - 0 (2-nitrobenzoate) RN - 0 (Fatty Acids) RN - 0 (Nitrobenzoates) RN - 0 (Parabens) RN - 7440-44-0 (Carbon) RN - AB6MNQ6J6L (Succinic Acid) RN - JG8Z55Y12H (4-hydroxybenzoic acid) SB - IM MH - *Adaptation, Physiological MH - Arthrobacter/cytology/*drug effects/*growth & development/metabolism MH - Bacterial Adhesion/drug effects MH - Carbon/metabolism MH - Drug Tolerance MH - Energy Metabolism MH - Fatty Acids/metabolism MH - Hydrophobic and Hydrophilic Interactions MH - Microscopy, Electron, Scanning MH - Nitrobenzoates/metabolism/*pharmacology MH - Parabens/metabolism/*pharmacology MH - Succinic Acid/metabolism EDAT- 2007/03/30 09:00 MHDA- 2007/08/04 09:00 CRDT- 2007/03/30 09:00 PHST- 2007/03/30 09:00 [pubmed] PHST- 2007/08/04 09:00 [medline] PHST- 2007/03/30 09:00 [entrez] AID - FML697 [pii] AID - 10.1111/j.1574-6968.2007.00697.x [doi] PST - ppublish SO - FEMS Microbiol Lett. 2007 Jun;271(1):65-70. doi: 10.1111/j.1574-6968.2007.00697.x. Epub 2007 Mar 28.