1981 Volume 47 Issue 2 Pages 228-233
Purine and their relative compounds were found to accelerate the infection and lesion formation caused by gray mold fungus, Botrytis cinerea, on cucumber seedling in the presence of glucose at the concentration more than 2.5%. The required concentration of all these compounds for exhibiting their action on the gray mold fungus to accelerated the infection and lesion formation were more than 1×10-5M. All pyrimidines, however, were not effective, even at the concentration of 1×10-3M. Among the purines, the tri- and the mono-phosphates were much more effective; whereas the free bases and the diphosphates were somewhat less effective. Some metabolites of purines, uric acid, allantoin and allantoic acid were considerably effective as well as that of ATP and AMP.