Cereal Chem 56:427 - 429.  |  VIEW ARTICLE
Variation in Starch Granule Size Distribution and Amylose Content During Wheat Endosperm Development.

C. M. Duffus and S. M. Murdoch. Copyright 1979 by the American Association of Cereal Chemists, Inc. 

This study confirmed that the amylose content of endosperm starch increases during grain development in wheat. Changes in the percent amylose content of endosperm starch granules separated into different size classes were then followed over the developmental period. At all stages of development, the amylose content of the smaller granules, expressed as a percentage of their total starch content, increased as starch granule size increased. Amylose content of the other separated size classes also increased somewhat in the later stages of development. This was most marked with those less than 7 micrometers in diameter. The largest granules (25-30 micrometers) accounted for only 0.4% of total granule numbers at 14 days after anthesis but accounted for about 3.7% by 56 days. At all stages of development, more than 78% of the granules were less than 10 micrometers.