The morphological microstructures of starch granules of endosperm cells of rice with different qualities were observed by means of an optical microscope and a scanning electron microscope. It was found that the high quality rice varieties had no chalky colour and the starch granules of their endosperm cells all appeared in the polygonal shape, identical size and dense arrangemeut. On the other hand the low quality rice varieties had chalky colour and the starch granules of their endosperm cells appeared in ...