Mikhail Khristoforovich Chailakhyan (, ; 1902–1991) was a Soviet Armenian scientist who is widely known for proposing the existence of a universal plant hormone that is involved in flowering.Hooley, R. 2005. Book review: Phytohormones in Plant Biotechnology. Annals of Botany 95(5): 888. He named this hormone florigen in 1936.Zeevaart JAD. 2006. Florigen Coming of Age after 70 Years. Plant Cell. 2006 August; 18(8): 1783–1789. His studies included the mechanisms of flowering, tuberization and sex expression in plants. His pioneer work included the agricultural applications of phytohormones and synthetic analogs.Aksenova, P. 2002. Problems of growth and development in the studies by M.Kh. Chailakhyan. Russian journal of Plant Physiology 49(4) 434-437.
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