Red River Valley Potato Processing Laboratory , East Grand Forks, Minnesota 56721.
Plant Physiol. 1966 Dec;41(10):1657-61. doi: 10.1104/pp.41.10.1657.
The accumulation of reducing sugars in potato tubers exposed to low temperatures occurs with concomitant formation of the enzyme invertase. During the initial period of cold treatment when reducing sugars increase rapidly, invertase formation proceeds until the level of enzyme exceeds that of an endogenous macromolecular invertase inhibitor, resulting in a basal invertase activity. As the rate of sugar accumulation decreases and the sugar level becomes nearly constant, total invertase decreases, the basal activity disappears, and a low excess of inhibitor develops. On transfer of cold-stored tubers to warmer temperatures, sugars and invertase decrease sharply and a large excess of inhibitor develops. These changes in sugars, invertase and inhibitor occur reversibly when the tubers are subjected to alternating temperatures.
低温暴露的马铃薯块茎中还原糖的积累伴随着转化酶的同时形成。在冷处理的初始阶段，还原糖迅速增加，转化酶的形成一直持续到酶的水平超过内源性大分子转化酶抑制剂的水平，从而导致基础转化酶活性。随着糖积累速率的降低和糖水平变得几乎恒定，总转化酶减少，基础活性消失，抑制剂的低过剩发展。将冷藏的块茎转移到温暖的温度下时，糖和转化酶急剧下降，并且抑制剂的大量过剩发展。当块茎受到交替温度时，糖、转化酶和抑制剂会发生可逆变化。
