Rhamnolipid-aided biodegradation of carbendazim by Rhodococcus sp. D-1: Characteristics, products, and phytotoxicity

The Impact of Biosurfactants on Microbial Cell Properties Leading to Hydrocarbon Bioavailability Increase

“…GY2B cells structure with higher rhamnolipid doses by scanning electron microscopy, similarly, Rhodococcus sp. D-1 cells deformations with increasing biosurfactant concentration were observed by Bai et al [72]. Sotirova et al recorded some cavitation of B. subtilis 168 [73] and Pseudomonas aeruginosa NBIMCC 1390 [74] cell membrane, whereas Ma et al [50] noted deformations of the Pseudomonas sp.…”

“…Many researchers have reported that rhamnolipids modify cell surface functional groups [49,50,66,72], however the impact of different biosurfactants on various microorganisms is diverse. Changes in the cell surface lipopolysaccharides [50], saturated alcohols, intramolecular hydrogen [72], carboxyl, phosphoryl, and amine groups have been observed [49]. Such changes in cell surface characteristics seem to be correlated more with cell adhesion to pollutants, rather than with enhancement of pollutants partitioning [72].…”

Cell changes and differential proteomic analysis during biodegradation of decabromodiphenyl ether (BDE-209) byPseudomonas aeruginosa

“…All the above results indicated that polysaccharides and proteins in the cell walls of P. aeruginosa may play critical roles in the binding of BDE-209. 27 2-DE is an effective tool for gaining insight into physiological changes at cellular level. 28 Thus analysis and identication of differentially expressed proteins during BDE-209 biodegradation could give us an insight into cell changes in this process.…”

“…The peak assignments of P. aeruginosa were as follows: 1086 and 1236 cm À1 were ascribed to P]O stretching vibration of phosphate groups, 1398 cm À1 ascribed to C-O stretching vibration of -COOH, 1455 cm À1 ascribed to C-H bending vibration of -CH 2 , 1544 cm À1 ascribed to N-H and C-N in amide groups, 1651 and 1741 cm À1 ascribed to C]O stretching vibration, 2925 and 2958 cm À1 ascribed to C-H stretching vibration, 3296 cm À1 ascribed to O-H stretching vibration. 17 For P. aeruginosa cells treated with BDE-209, the peaks at 3296, 1651 and 1544 cm À1 become broader, and the intensity of peaks 2925 cm À1 decreased gradually. In control, less obvious changes with time were observed.…”

Remediation of Organically Contaminated Soil Through the Combination of Assisted Phytoremediation and Bioaugmentation

“…We chose these surfactant concentrations following Wang et al [58] who reported highest reductions in PAH concentrations in a long-term contaminated soil using these very same concentrations. Nonetheless, in another study [59], the most effective degradation of carbendazim (a stable benzimidazole fungicide) was achieved at 50 mg rhamnolipid kg −1 soil (in contrast, the application of 150 mg rhamnolipid kg −1 soil inhibited carbendazim degradation). Other authors [60] observed that the application of rhamnolipids at 150 mg kg -1 soil was most appropriate for the remediation of a diesel-oil contaminated soil through bioaugmentation with a bacterial consortium.…”