Robert A. Harper

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Robert Almer Harper (born January 21, 1862 in Le Claire , Iowa , † May 12, 1946 in Bedford , Virginia ) was an American botanist at Lake Forest College (in Lake Forest , Illinois ), at the University of Wisconsin, Madison and at Columbia University . Its botanical abbreviation is RAHarper .

Harper earned a bachelor's degree from Oberlin College in 1886 and a master's degree there in 1891 . He received immediately after at Lake Forest College professor of botany, which he studies at Oscar Brefeld at the University of Muenster and Eduard Strasburger at the University of Bonn interrupted, where he in 1896 a Dr. phil. acquired. In 1898 Harper became a professor at the University of Wisconsin, and in 1911 at Columbia University. In New York he was involved in the scientific management of the New York Botanical Garden , to which he bequeathed his collection of 15,000 botanical prints shortly before his death.

Robert A. Harper identified details in the reproduction and development of the spores in tubular fungal infections (see Ascent mushrooms # Sequence of sexual spore formation ). He was able to gain important insights into spore formation in powdery mildew . He realized that the cytoplasmic division, which leads to eight identical spores, originates from the cell nucleus . He also dealt with phytopathology and the development of structural features of fungi .

In 1906 Harper was elected as a fellow in the American Association for the Advancement of Science , in 1909 as a member of the American Philosophical Society , in 1911 in both the National Academy of Sciences and the American Academy of Arts and Sciences , and in 1933 in the Leopoldina . In 1916 he was President of the Botanical Society of America . Harper held honorary degrees from Columbia University and the University of Pennsylvania .

Robert Almer Harper was married to Alice Jean McQueen since 1899, who died in 1909. In 1918 he married Helen Sherman. There was a son from his second marriage.

Fonts (selection)

  • Opuscula , 1895.
  • Cell division in Sporangia and Asci , 1899.
  • Nuclear Phenomena in Certain Stages in the Development of the Smuts , 1899
  • Sexual Reproduction and the Organization of the Nucleus in Certain Mildews , 1905.
  • The Organization of Certain Coenobic Plants , 1908.

literature

Individual evidence

  1. ^ RA Harper. In: International Plant Names Index . Retrieved July 7, 2018 .
  2. ↑ Harper, Robert Almer. In: aaas.org. February 9, 2018, accessed July 7, 2018 .
  3. ↑ Member History. In: search.amphilsoc.org. Retrieved July 7, 2018 .
  4. ↑ Robert Harper. In: nasonline.org. Retrieved July 7, 2018 .
  5. ↑ Book of Members 1780 – present, Chapter H. (PDF; 1.2 MB) In: American Academy of Arts and Sciences (amacad.org). Retrieved July 7, 2018 .
  6. ↑ Member entry of Robert Almer Harper at the German Academy of Natural Scientists Leopoldina , accessed on July 7, 2018.
personal data
SURNAME Harper, Robert A.
ALTERNATIVE NAMES Harper, Robert; Harper, Robert Almer
BRIEF DESCRIPTION American botanist
DATE OF BIRTH January 21, 1862
PLACE OF BIRTH Le Claire , Iowa
DATE OF DEATH May 12, 1946
Place of death Bedford , Virginia