Relationship between oxygen concentration in endogenous gas beneath potato skin and blackspot bruise.

我国马铃薯产量为400万吨，其中70%产于北海道。马铃薯加工业的消费增加了西方化的饮食习惯，马铃薯的黑点挫伤是马铃薯加工业中的一个严重问题。在这项研究中，黑斑病的机制进行了调查，使用抗（Hokkaikogane），中间（Toyoshiro，Toya）和感病（Norin-ichigo，Danshaku-imo）品种。通过测定多酚氧化酶（PPO）活性、酚含量、马铃薯皮的断裂力、马铃薯的破坏力和马铃薯块茎内的内源气体，得出PPO对马铃薯损伤的贡献最大，其次是破坏力、酚含量和断裂力。感病品种O2浓度较低，CO2浓度较高。因此，本研究揭示了培育具有硬壳和组织的马铃薯品种以及尽可能抑制呼吸作用的马铃薯储存和处理对于抑制损伤是重要的。

The potato production of our country is 4,000,000 tons, and 70% is produced in Hokkaido among those. The consumption of the potato for the processing increases westernizing eating habits, and the blackspot bruise of potatoes is a serious problem in potato processing industries. In this study, the mechanism for the blackspot bruise was investigated using the blackspot resistant (Hokkaikogane), middle (Toyoshiro, Toya) and susceptible (Norin-ichigo, Danshaku-imo) varieties. When the polyphenol oxidase (PPO) activity, phenol content, rapture force of potato skin, destruction load of potato, and endogenous gas inside potato tuber were measured, the PPO was the heist contribution to the bruise, followed by the destruction load, phenol content and rapture force. In addition, the O2 concentration was smaller in the susceptible variety while the CO2 was higher. Therefore, this study revealed that it was important for suppressing the bruise to develop potato varieties with hard skin and tissue, and to store and handle potatoes as much as suppressing the respiration.