AI Article Synopsis
- Leptothrix bacteria rapidly produce large, Fe/Mn-encrusted sheaths in groundwater, which can clog water systems.
- Through time-lapse video observation, researchers investigated how strain OUMS1 forms tangled clumps of sheaths within days.
- The study revealed that quick processes like fragmentation and re-aggregation of sheath filaments are key to the bacteria's rapid sheath production.
Article Abstract
Species of the Fe/Mn-oxidizing bacteria Leptothrix produce tremendous amounts of microtubular, Fe/Mn-encrusted sheaths within a few days in outwells of groundwater that can rapidly clog water systems. To understand this mode of rapid sheath production and define the timescales involved, behaviors of sheath-forming Leptothrix sp. strain OUMS1 were examined using time-lapse video at the initial stage of sheath formation. OUMS1 formed clumps of tangled sheaths. Electron microscopy confirmed the presence of a thin layer of bacterial exopolymer fibrils around catenulate cells (corresponding to the immature sheath). In time-lapse videos, numerous sheath filaments that extended from the periphery of sheath clumps repeatedly fragmented at the apex of the same fragment, the fragments then aggregated and again elongated, eventually forming a large sheath clump comprising tangled sheaths within two days. In this study, we found that fast microscopic fragmentation, dissociation, re-aggregation and re-elongation events are the basis of the rapid, massive production of Leptothrix sheaths typically observed at macroscopic scales.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5037351 | PMC |
| http://dx.doi.org/10.3390/biology5030032 | DOI Listing |
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