Variation in sterols, alkaloids, and polyphenols of two nicotiana varieties under different nitrogen fertilization and drying processes

Abstract

Coker 139 and Burley 21 were cultured under high and low levels of nitrogen fertilization and sampled throughout the growing season. Analyses of polyphenols, alkaloids, and sterols were performed on primed fresh leaves, air-dried leaves, and oven-dried leaves. Coker 139 had higher quantities of rutin and chlorogenic acid than Burley 21, and in both varieties the polyphenols decreased over the growing season.