Glucosylation of cytokinin analogues

David S. Letham*, Roger E. Summons, Barrie Entsch, Bettina I. Gollnow, Charles W. Parker, John K. MacLeod

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    22 Citations (Scopus)


    Glucosylation of adenine and 6-methylaminopurine was not detected in derooted 10-day-old radish seedlings. However, 4-(purin-6-ylamino)butanoic amide and 6-(3,4-dimethoxybenzylamino)purine (N6-substituted adenines with negligible cytokinin activity), like the highly active cytokinin 6-benzylaminopurine, were converted to 7-glucopyranosides. The N2-substituted guanine, 2-benzylaminopurin-6-one, and 6-benzylamino-2-(2-hydroxy-ethylamino)purine were also metabolized to glucosides which were probably 7-glucopyranosides. Hence glucosylation of purines is not restricted to N6-substituted adenines with strong cytokinin activity. Although only ca 1.6% of 6-benzylamino-9-(4-chlorobutyl)purine taken up by the derooted seedlings could be accounted for as 7- and 9-glucosides, a considerable proportion was metabolized to these glucosides in cotyledons excised from 2-day-old radish seedlings. The high cytokinin activity of this 9-substituted compound may be a consequence of cleavage of the 4-chlorobutyl groud at N-9.

    Original languageEnglish
    Pages (from-to)2053-2057
    Number of pages5
    Issue number12
    Publication statusPublished - 1978


    • Cruciferae
    • cytokinins.
    • metabolism
    • radish
    • Raphanus sativus
    • substituted purines


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