Rudolf Jakob Camerarius

Rudolf Jakob Camerarius
Rudolf Jakob Camerarius
	ملف:Rudolf jakob camerarius.jpg
وُلِدَ	12 فبراير 1665; Tübingen, Holy Roman Empire
توفي	11 سبتمبر 1721 (aged 56); Tübingen, Holy Roman Empire
أسماء أخرى	Camerer
عـُرِف بـ	Investigations on the reproductive organs of plants (De sexu plantarum epistola)
الوالد(ان)	Elias Rudolph Camerarius Sr. (الأب);
	السيرة العلمية
المجالات	Botanist and physician
المشرف على الدكتوراه	Elias Rudolph Camerarius Sr.; Georg Balthasar Metzger
طلاب الدكتوراه	Johann Andreas Planer

Rudolf Jakob Camerarius or Camerer (12 February 1665 – 11 September 1721) was a German botanist and physician.

Life

Camerarius was born at Tübingen, and became professor of medicine and director of the botanical gardens at Tübingen in 1687. He is chiefly known for his investigations on the reproductive organs of plants (De sexu plantarum epistola (1694)).^[1]

While other botanists, such as John Ray and Nehemiah Grew, had observed that plants seemed to have sex in some form, and guessed that pollen was the male fertilizing agent, it was Camerarius who did experimental work. In studying the mulberry, he determined that female plants not near to male (staminate) plants produced fruit but with no seeds. Mercurialis and spinach plants fared likewise. With the castor oil plant (Ricinus) and with maize he cut off the staminate flowers (the "tassels" of maize), and likewise observed that no seeds formed. His results were reported in the form of a letter (the epistola), and attracted immediate attention, subsequent workers extending his results from the monoecious plants he had studied to dioecious ones as well.

Works

ملف:Camerarius, Rudolf Jakob – De sexu plantarum, 1694 – BEIC 11856403.jpg

De sexu plantarum, 1694

De plantis vernis (in اللاتينية). Tübingen: Martin Rommey. 1688.
De sexu plantarum (in اللاتينية). Tübingen: Martin Rommey. 1694.

Notes

^ Chisholm 1911.

References

This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Camerarius, Rudolf Jakob" . دائرة المعارف البريطانية. Vol. 5 (eleventh ed.). Cambridge University Press. p. 108. {{cite encyclopedia}}: Cite has empty unknown parameter: |coauthors= (help)
Duane Isely, One hundred and one botanists (Iowa State University Press, 1994), pp. 74–76

External links

Media related to Rudolf Jakob Camerarius at Wikimedia Commons
Rudolf Jakob Camerarius at the Mathematics Genealogy Project

[FOOTNOTEChisholm1911-1] Chisholm 1911.

[1]