Effects of substituted pyrrolo(2,3-d)pyrimidine derivatives [herbicide] on plant growth

• Published in: Journal of Pesticide Science 1981/02/20, Vol.6(1), pp.9-15
• Main Authors: IWAMURA, Hajime, ITO, Tetsuo, MASUDA, Noboru, MIZUNO, Akira, KOSHIMIZU, Koichi, KUMAZAWA, Zenzaburo, NAGATO, Shoin, OKUDA, Shiroh
• Format: Article
• Language: English
• ISSN: 0385-1559; 1348-589X; 1349-0923
• DOI: 10.1584/jpestics.6.9

The plant growth inhibitory activity of some 7-(β-D-ribofuranosyl)pyrrolo[2, 3-d]-pyrimidines, analogs of the antibiotic tubercidin, was conspicuous through three bioassay systems used in this study, i. e. pre-emergence, foliar treatment and submerged tests. Deribosylated, base analogs of some representatives were, however, shown to be weakly active, implying that the 7-ribosyl moiety plays a role in enhancing activity. On the other hand, some of 4-substitutedamino-pyrrolo[2, 3-d]pyrimidines were as active in the pre-emergence test as the corresponding nucleoside derivatives which are known as anticytokinins in the tobacco callus system. Other kinds of anticytokinins with the pyrrolo[2, 3-d]pyrimidine structure exhibited, however, weak plant growth inhibitory activity, showing that anticytokinin nature in the tobacco callus test is not necessarily in parallel with activities in other test systems like those used in this study.