抄録
This investigation has been undertaken to know the temperature and its duration to cause freezing injury on potato seedlings of about 40 days old by artificially produced low temperature. The results obtained are summarized as follows. [table] according to this investigation, it seems that the freezing temperature of potato seedling is slightly higher than those of many other crops. Perhaps such a difference may be due to the higher freezing temperature of cell sap in potato seedlings than in other crops. Also the non-hardened condition of materials and the rapid refrigeration as well as the susceptible stage of seedling development may have caused early freezing injury on potato seedlings.
