Figure 2
From: Lake microbiome and trophy fluctuations of the ancient hemp rettery
Lake Slone sediment core and hemp fibres. (a) Photo of the LS-0 sediment core (composite core sampled parallel to LS-C19 core with Instorf-type of sediment sampler), exhibiting distinct lithological changes of the sediment with an approximate location of the layers selected for metagenomic DNA isolation (material taken from LS-C19 core). (b,c) Polarised light microscopy images of hemp fibres extracted from a layer at 65 cm depth of the LS-C19 core. Results of the modified Herzog test22 to identify hemp bast fibres show the characteristic colour change from blue to yellow upon sample stage rotation by 90° which would be expected of hemp fibres, (d) Scanning Electron Microscopy (SEM) image of a hemp bast fibre collected from the layer at 65 cm depth from LS-C19 at the magnification × 500, (e) SEM image of a hemp bast fibre at the magnification × 5000.
