Observations on the reactions of Plant to the infection of some pathogens. I.

(1) The germination of the conidia of both Fusarium nivale(F.R.) Ces. and Fusarium solani in the ground juice of barley leaves was better than that in the dist. water and was somewhat inhibited in comparison with that in the boiled ground juice. From this method, no difference was foulld between the reactions of the barley to the conidial germination of these fungi.(2) Barley leaves, which were needle pricked and mounted with drops of dist. wate on the wounded parts, were kept in a moist chamber. In the experiment with these drops which were gathered to test after 24 hours, it was cleared that the, germination of the conidia of F. solani in this drops was inhibited significantly and that the gemination of the conidia of this fungus in the drops which had been inoculated with the conidia of this fungus on the wound parts of, the barley leaf piece was checked completely. These inhibition of germination could not be observed in the case of F. nivale. The results of this experiment suggest that the reaction of the barley to the infection by F. nivale (pathogen) differ from that to the infection by F. solani (non pathogen).