RNA Composition in Cotton 1

Suimmary. Nucleotide compositions of soluble (sRNA), whole-cell, and in one instance particulate and nonparticulate, RNA of embryos, cotyledons (dark and lightgrown), leaves, stems, ancd roots of Gossypium hirsuttum were compared. Evidence of substantial differences in the overall compositions of the RNAs was not obtained. However, a tendency for some plant parts to differ, particularly in sRNA composition, and that of the cotyledons (including particulate and nonparticulate RNA) to change durinlg the formation of chlorophyll, was indicated by small but statistically significant shifts in certain nucleotide components.