Growth and Development of Horticultural Crops (1+1)

Cytokinins in t-RNA

• In 1966 Zachau et al. identified cytokinin 2iPA as a constituent of two serine t-RNA species from brewers yeast and showed this cytokinin to be adjacent to the 3’ end of the anticodon in both the species.
  
• Apart from yeast, cytokinins have now been found in t-RNA preparations from a wide variety of organisms such as bacteria including E.coli, animals including man and higher plants viz., frozen peas, tobacco callus tissue.