phenolic acids and compounds and were more resistant to grain weathering. Phenolic acids
and compounds increase during caryopsis development with a maximum at physiological
maturity (and a decrease afterwards). This decrease may be due to decomposition, covalent
linkage to structural polymers, or to entrapment with the solid endosperm matrix. Higher levels of
phenolic compounds relate to improved grain mold resistance. This observation, however, may be
the simple result of the strong correlation of phenolic compounds with tannins, since most tannin
containing sorghums are more resistant to grain mold.