Mohl, Hugo von (1805–1872)
Hugo von Mohl was a German botanist who did pioneering research into the anatomy and physiology
of plant cells. He formulated the idea
that the cell nucleus is surrounded by
a granular, colloidal substance, which in 1846 he called protoplasm,
although the term had been invented by Jan Purkinje (1787–1869) in
reference to the embryonic material in eggs. Von Mohl was the first to propose
that new cells arise from cell division.
In 1851 he claimed that the secondary wall of a plant cell is fibrous, and
this was subsequently confirmed. He also gave the first distinct account
of the function of osmosis.