Correlating Biodegradation Kinetics of 2,4-Dichlorophenoxyacetic Acid (2,4-D) and 2,4,5-Trichlorophenoxyacetic Acid (2,4,5-T) to the Dynamics of Microbial Communities Originating From Soil in Vietnam Contaminated With Herbicides

We determined the degradation rates of herbicides 2,4-D and 2,4,5-T by two different bacterial communities. One these originated from soil heavily contaminated with Bien Hoa airbase, other same but amended additional carbon Gibbs energy sources. The community contaminated, untreated, degraded both within 5 days cultivation. one soil, however, hardly showed any compounds throughout 23 After refreshment medium prolonged culturing, this 25 progressively increasing rates. nMDS analysis revealed a highly significant differentiation pattern Cultures inoculated increase Bacillus Paenibacillus upon exposure to herbicides. succession in culture untreated on hand, was dominated species Proteobacteria. were able isolate them they shown be related Bordetella petrii Sphingomonas histidinilytica , successively. Subsequent PCR analyses their DNA presence key genes involved This study provides more fundamental understanding biodegradation displaying part during breakdown allowing comprehensive view potential degraders.