Respiration of sweet potato roots was significantly depressed by low oxygen concentrations from 5 to 15% compared to 20% O 2 , but respiration at 2.5% O 2 was high. Total sugar accumulated with low oxygen (2.5 and 5.0%) storage. Protopectin was low in roots stored at low O 2 concentrations but water soluble pectin was not significantly affected. Physical parameters Ew and δf the storage roots were high when stored at low O 2 concentrations. Ey and Ef were not significantly affected. Ew was correlated with total sugar (r = 0.79).
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Chang et al. (1981) studied this question.
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