在未成熟的甜菜块根中,测定碱性蔗糖酶的活性是很难的,但在块根开始发育及蔗糖合成的同时,蔗糖酶出现。此后,随着蔗糖积累而平行增长。与之相反,酸性蔗糖酶在未成熟块根中的活性则很高,但在蔗糖贮藏之前迅速下降,在成熟块根中很难测得。 In unripe beet root, it is difficult to measure the activity of alkaline sucrase, but sucrose enzyme appears at the same time as root tuber begins to develop and sucrose is synthesized. Since then, it increases in parallel with sucrose accumulation. In contrast, acid invertase is highly active in immature roots, but declines rapidly before storage of sucrose and is hard to measure in mature roots.