Gustaf Otto Rosenberg, Date of Birth, Place of Birth, Date of Death
TweetGustaf Otto Rosenberg
botanist (1872-1948)
Date of Birth: 
Place of Birth: Domkyrkoförsamlingen i Göteborg, Västra Götaland County, Sweden
About Gustaf Otto Rosenberg
- Gustaf Otto Rosenberg, termed Otto Rosenberg in publications, born June 9, 1872 in Gothenburg, Sweden, died November 30, 1948, was a Swedish botanist; son of Johan Olof Rosenberg. Rosenberg studied in Uppsala, Stockholm and Bonn, he gained a bachelor's degree at the University of Uppsala in 1895, and a PhD in Bonn in 1899 where he studied under Eduard Strasburger (1844–1912).
- His PhD thesis addressed the cytological changes that occur in the cells of the Sundew plant (Drosera) when they are irritated.
- Also in 1899, he became an associate professor of Botany at the University of Stockholm.
- Rosenberg worked at the Botanical Institute in Stockholm from 1904 and was promoted to a professorship in plant anatomy and cytology in 1911, at the same university.Later, Rosenberg studied meiosis in the hybrid of Drosera longifolia crossed with D.
- rotundifolia, this was the first cytologically examined plant hybrid.
- The former of the two parent species contained 40 chromosomes, the latter 20; however, the near-sterile hybrid (D.
- obovata) contained 30 chromosomes. This Drosera 'scheme’ was almost certainly the first example of the parents of a hybrid being identified through the analysis of chromosome pairing during meiosis.Rosenberg's writings dealt mainly in cytology and plant embryology and he became very prominent in these fields.
- In 1917 he was elected a member of the Royal Swedish Academy of Sciences and, in 1925, a member of the Royal Danish Academy of Sciences and Letters.
- Rosenberg became a Commander of the Order of the Polar Star, November 22, 1932. The standard author abbreviation O.Rosenb.
- is used to indicate this person as the author when citing a botanical name.
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