German physiologist botanist of Jewish origin, born in Breslau, today Wroclav, Poland, founder of modern experimental science in plant physiology. Under the supervision of Jan Evangelista Purkinje, he obtained his doctorate in Plant Physiology at the University of Prague (1856). He received the title of Full Professor (1856) from the chair of Plant Physiology and, three years later (1859), he went to teach this subject in Popplesdorf, near Bonn. As a researcher, he initially dedicated himself to plant morphology, but achieved his greatest successes in physiology, becoming a world authority on the subject.
He showed that starch in plants was produced by photosynthetic processes (1862), discovering the chlorophyllian function. He wrote his definitive work: Handbuch der Experimentalphysiologie des Pflanzen (1865). The study of plant movement as a reaction to external stimuli such as light, gravity, heat, etc., completed his scientific production and died in Würzburg, Germany. Other important works of his were Lehrbuch der Botanik (1868), Geschichte der Botanik (1875) and Vorlesungen uber Pflanzenphysiologie (1882).
Source: http://www.dec.ufcg.edu.br/biografias/
Order F - Biography - Brazil School
Source: Brazil School - https://brasilescola.uol.com.br/biografia/ferdinand-gustav-julius-von-sachs.htm
