Philip R. White (1901-1968) First to establish indefinite growth of isolated roots and of tumor tissues of plants.
P. Nobecourt (1895-1961) One of the pioneers, along with Gautheret and White of plant tissue culture. He obtained growth of carrot tissues in 1939.
Earnest A. Ball (1909- ) discovered the principle of micropropagation (1946).
Folke Skoog (1908- 2001 ) Leading member of the group that discovered kinetin. Organogenesis with Carlos Miller.