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  4. Cytokinin was first discovered by

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Q. Cytokinin was first discovered by

NTA AbhyasNTA Abhyas 2022

Solution:

The first cytokinin was discovered by Miller, Skoog, and Strong (1955) during the callus tissue culture of Nicotiana tobaccum (tobacco). It was a synthetic product formed by autoclaving Herring sperm (fish sperm) DNA. This synthetic product was identified as 6-furfuryl amino-purine and named kinetin.