Starch Deposition and Carbohydrase Activities in Developing and Germinating Soya Bean Seeds

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Abstract
Immature soya bean seeds accumulate starch as a transient reserve material which is utilized later in development. Germinating seeds also accumulate starch reserves, probably as a result of gluconeogenesis from storage lipid. Developing beans show a rapid increase in β-amylase activity which continues into early germination before declining. Distribution of β-amylase activity is not consistent with its supposed role in starch degradation. Soya bean seeds also contain α-amylase and α-glucosidase activities which could be responsible for starch mobilization.