UNUSUAL STRUCTURES IN CORN STARCH GRANULES*

Abstract
Commercial Buffalo corn starch frequently showed granules possessing a central cavity and a few radial fissures in electron microscopic pictures of methacrylate impregnated ultrathin sections (0.05-0.25 micron). Concentric lamellar structure was found in 1/5-1/7 of the tested sections. A salivary amylase-digested section demonstrated a bigger central hole along with broader radial fissures than the non-digested one did. It is suggested that a central cavity and radial fissures in the granule may be less resistent parts against amylolytic processes, occurring in vivo before harvesting.

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