MS in Molecular Plant Science

During the Weimar Republic, the university quickly grew to become important. The student population reached several thousand, and the growing popularity of the university drew scholars such as Albrecht Mendelssohn Bartholdy, Aby Warburg and Ernst Cassirer to Hamburg. Many students were suffering due to the poor economic situation that prevailed in the early republic, leading to the foundation of the Hamburg Association of Student Aid in 1922. Ernst Cassirer became the principal of the university in 1929, one of the first Jewish scholars to take that role in Germany. The number of full professors had grown to 75 by 1931.

The academic situation shifted quickly after the general election in March 1933. On 1 May of that year, the university held a ceremony to honor Adolf Hitler as its leader. Massive political influence by the Nazis followed, including the removal of books from the libraries and harassment against alleged enemies of the regime. About 50 scientists, including Ernst Cassirer and William Stern, had to leave the university. At least 10 Hamburg students were suspected of working with the White Rose and arrested; four died in custody or were executed. A commemorative plate depicting the foyer of the lecture hall, designed by Fritz Fleer, was produced in 1971 in their memory.