Changyang Archives

Ultrastructures of the microfossil Qingjiangonema cambria. (a, b) SEM images of Q. cambria on the macrofossil in Fig. 2a, indicating focused ion beam (FIB) milling positions of longitudinal and cross sections, respectively. (c) Scanning transmission electron microscope-high angle annular dark field (STEM-HAADF) image of the ultrathin cross section in (b), showing microcrystals tightly packed within a thin envelope. (d) STEM-HAADF image of the ultrathin longitudinal section in (a), showing that neighboring cells are disconnected with intercellular boundaries, note that microcrystals are much smaller in the smaller cell than those in the larger neighboring cells. (e) Close-up of the boxed area in (c), showing the ultra-thin, multilayered film comparable to the typical cell envelope of Gram-negative bacteria, which comprises a cytoplasmic membrane (CM), a periplasmic space (PS) and an outer membrane (OM). -- Science Bulletin

Biophysics, Biosignatures & Paleobiology, Microbiology & Virology, Origin & Evolution of Life, Press Release

Microfossil Qingjiangonema Sheds Light Evolution Of Sulfate-reducing Bacteria In Response To Oxygenation

by Keith CowingJune 12, 2024June 12, 2024

Microbial sulfate reduction dating back to the Paleoarchean plays a crucial role in driving global carbon and sulfur cycles in ancient and modern Earth.

Changyang

Microfossil Qingjiangonema Sheds Light Evolution Of Sulfate-reducing Bacteria In Response To Oxygenation

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