Pringsheim , Nathanael

Pringsheim , Nathanael
(1823–1894) German botanist
Pringsheim, who was born at Wziesko (now in Poland), studied medicine at the universities of Breslau and Leipzig. However, his interest turned to natural science when he moved to the University of Berlin; he gained his PhD in 1848 with a thesis on the growth and thickness of plant cell walls. In 1864 he was appointed professor of botany at the University of Jena but resigned the post in 1868 to conduct private research in a laboratory attached to his home in Berlin.
Pringsheim was one of the leaders in the botanical revival of the 19th century with his contribution to studies of cell development and life history, particularly in the algae and fungi. He was among the first to demonstrate sexual reproduction in algae and observe alternation of generations between the two sexually differentiated motile zoospores and the resting undifferentiated spore that results from their fusion. He further showed that sexual reproduction involves fusion of material of the two sex cells.
From studies (1873) on the complex morphological differentiation in a family of marine algae, the Sphacelariaceae, Pringsheim opposed the Darwinian theory of evolution by natural selection. Like the Swiss botanist, Karl Naegeli, he believed the increase in structural complexity to be a spontaneous morphological phenomenon, conferring no survival value.
Pringsheim's studies of the origin of plant cells contributed evidence for the theory that cells are only produced by the division of existing cells. With Julius von Sachs, Pringsheim also described the plastids, organelles unique to plant cells. In later years he concentrated more on physiology than morphology but his contributions to this field were not acknowledged or developed by other workers.
He was founder of the Jahrbücher für Wissenschaftliche Botanik(1858; Annals of Scientific Botany) and the German Botanical Society (1882). He wrote memoirs on Vaucheria (1855),Oedogonium and Coleochaete (1856–58), Hydrodictyon (1861), and Pandorina (1869).

Scientists. . 2011.

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  • Pringsheim, Nathanael — ▪ German botanist born Nov. 30, 1823, Wziesko, Silesia died Oct. 6, 1894, Berlin, Ger.       botanist whose contributions to the study of algae made him one of the founders of the science of algology.       Pringsheim studied at various… …   Universalium

  • Nathanael Pringsheim — Born 30 November 1823 Landsberg, Prussian S …   Wikipedia

  • Nathanael Pringsheim — (um 1890) Nathanael Pringsheim (* 30. November 1823 in Landsberg, Oberschlesien; † 6. Oktober 1894 in Berlin) war ein deutscher Botaniker und Geheimrat. Sein offizielles botanisches Autorenkürzel lautet „Pringsh …   Deutsch Wikipedia

  • Pringsheim — is a Jewish Silesian surname and may refer to: * Alfred Pringsheim (1850 1941), mathematician, father in law of writer Thomas Mann * Ernst Pringsheim, Sr. (1859 1917), German physicist * Ernst Pringsheim, Jr. (1881 1970), German botanist * Klaus… …   Wikipedia

  • Pringsheim — Pringsheim, Nathanael, Botaniker, geb. 3. Nov. 1823 zu Wziesko (Oberschlesien), 1858 Akademiemitglied in Berlin, 1864 Prof. in Jena, 1868 wieder in Berlin, gest. das. 6. Okt. 1894, entdeckte die Sexualität bei den niedrigsten Gewächsen,… …   Kleines Konversations-Lexikon

  • Nathanael Pringsheim — fue un botánico alemán nacido el 30 de noviembre de 1823 y fallecido el 6 de octubre de 1894. Nació en Wziesko, cerca de Landsberg, en Silesia, y estudió sucesivamente en las Universidades de Wroclaw (o Breslau), de Leipzig, y en la Universidad… …   Wikipedia Español

  • Nathanael Pringsheim — (ou Nathaniel Pringsheim) est un botaniste allemand, né le 30 novembre 1823 dans une famille juive de Landsberg en Silésie (à l époque prussienne ; actuellement Gorzów Śląski en Pologne) et mort le 6 octobre 1894 à Berlin. Son père était un… …   Wikipédia en Français

  • Pringsheim — ist der Name einer bekannten deutschen Familie jüdischer Abstammung aus Schlesien. Der Name wurde 1794 erstmals urkundlich erwähnt. Alle Pringsheims sind Nachfahren des Bernstädter Juden Mendel (Menachem) b. Chaim Pringsheim. Rudolf Pringsheim… …   Deutsch Wikipedia

  • Pringsheim — Pringsheim, 1) Nathanael, Botaniker, geb. 30. Nov. 1823 zu Wziesko in Oberschlesien, gest. 6. Okt. 1894 in Berlin, studierte in Breslau, Leipzig, Berlin und Paris Medizin, dann Naturwissenschaft, habilitierte sich 1851 als Privatdozent an der… …   Meyers Großes Konversations-Lexikon

  • Nathaniel Pringsheim — Nathanael Pringsheim Nathanael Pringsheim (ou Nathaniel Pringsheim) est un botaniste allemand, né le 30 novembre 1823 dans une famille juive de Landsberg en Silésie (à l époque prussienne ; actuellement Gorzów Śląski en Pologne) et mort le 6 …   Wikipédia en Français

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