Wilhelm Pfeffer

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Pfeffer, Wilhelm


Born Mar. 9, 1845, in Grebenstein, near Kassel; died Jan. 31, 1920, in Leipzig. German botanist.

Pfeffer, who graduated from the University of Göttingen in 1865, was a professor at the universities of Bonn (1873), Tübingen (1878), and Leipzig (1887). His work was largely devoted to osmosis and its role in the absorption, transfer, and evaporation of water in plants. He also studied the role of osmosis in the mineral nutrition of plants. Pfeffer’s works included studies of plant respiration, photosynthesis, nitrogen exchange, and irritability. He discovered positive chemotaxis in the spermatozoids of ferns.


Pflanzenphysiologie, 2nd ed., vols. 1–2. Leipzig, 1897–1904.


Fitting, H. “Wilhelm Pfeffer.” Berichte der Deutschen Botanischen Gesellschaft, 1920, vol. 38. (List of works.)
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The book begins with an introduction to early experiments noticing biological rhythms in a variety of organisms, followed by a chapter focusing on researcher Wilhelm Pfeffer and his seminal work at the turn of the twentieth century.