Sorghum-size relationships of seed, embryo, seedling and the first seedling leaves

Abstract

The seeds of sorghum vary very much in their size. Seed size (length × breadth × thickness) is highly correlated to seed weight. The larger the seed the bigger is its embryo, and the bigger the seedling that grows from it. In six varieties typical of different seed sizes the relationship between seed and seedling leaf measurements have been pursued. The first two seedling leaves are abnormal, in shape, being much wider than long. In these two seedling leaves the width of the seedling is highly correlated with seed size. In the third seedling leaf the length of the leaf is beginning to be influenced by seed size. In this third leaf the midrib and ligular and auricular structures attain their full development.