Effect of selenite on the morphology and respiratory activity of Phanerochaete chrysosporium biofilms

• DOI: 10.1016/j.biortech.2016.02.074
• Publication Date: 2016-02-26T08:06:04Z
• Authors: Erika J. Espinosa...; Yoan Pechaud; Ellen Lauchnor; Eldon R. Rene; Robin Gerlach; Brent M. Peyton; Eric D. van Hulle...; Piet N.L. Lens
• Keywords: Chrysosporium; Phanerochaete

The temporal and spatial effects of selenite (SeO3(2-)) on the physical properties and respiratory activity of Phanerochaete chrysosporium biofilms, grown in flow-cell reactors, were investigated using oxygen microsensors and confocal laser scanning microscopy (CLSM) imaging. Exposure of the biofilm to a SeO3(2-) load of 1.67mgSeL(-1)h(-1) (10mgSeL(-1) influent concentration), for 24h, resulted in a 20% reduction of the O2 flux, followed by a ∼10% decrease in the glucose consumption rate. Long-term exposure (4days) to SeO3(2-) influenced the architecture of the biofilm by creating a more compact and dense hyphal arrangement resulting in a decrease of biofilm thickness compared to fungal biofilms grown without SeO3(2-). To the best of our knowledge, this is the first time that the effect of SeO3(2-) on the aerobic respiratory activity on fungal biofilms is described.