馬鈴薯疫病病斑中の活性鉄に就いて

Potato tubers (as susceptible varieties, Danshaku-imo and Early Rose, as resistant varieties Kintoki-imo and Kennebec were used) were planted on march 24, 1953 in the University Farm of shimane Agr. College.
Active iron was analysed on the filtrate extracted for 24 hrs. by nHCI. Suscepetible varieties have much more total iron content than the resistant varieties.
In the lower leaves, the peak of total and active iron was observed on June 10 and this peak was coincided with the flowering period of the potato plant. Every potato variety increased in its active iron content with the laps of its growing stage.
The Proprtion of active iron to total iron decreased in the necrotic parts. The proportion of active iron to total iron decreased in the diseased part, in both varieties, Danshaku-imo and kintoki-imo.
OSERKOWSKY proved active iron soluble in nHCl, has intimate relationship to the chlorophyll content. McGEORGE urged the significance of the Proportion of active iron to total one. As to the enzyme activity, connected with Fe active molecule such as catalase and peroxydase, future studies are now expected.