Julius von Sachs (1832-1897) was a German botanist and the founder of experimental plant physiology. He discovered that, in the presence of light, chlorophyll catalyzes photosynthetic reactions (1865). He also discovered the chlorophyll-containing chloroplasts and that starch is produced in chloroplasts as a result of the photosynthetic activities. Among his works is the famous Textbook of Botany (1868, tr. 1882), which first combined the knowledge gained in various branches of modern botany.
Sachs, Julius Von (The Ohio State University)