11个陆地棉(Gossypium hirutum L.)品种和品系的叶、茎、根中,可溶性酚含量(ppm)分别为70—79、29—34、13—14。植株为同组织酚的含量有差异,而且抗病品种(系)酚的含量比感病品种(系)略高,但品种间的差异不显著。棉株中酚及其衍生化合物的天然含量不足以阻止枯、黄萎病的侵染。 The contents of soluble phenols (ppm) in leaves, stems and roots of 11 Gossypium hirutum L. cultivars and lines were 70-79, 29-34 and 13-14, respectively. The content of phenol in plants was different from that in the same tissue, and the content of phenol in resistant varieties (lines) was slightly higher than that in susceptible varieties (lines), but the differences among varieties were not significant. The natural content of phenol and its derivatives in cotton plants is not enough to prevent the infection of withered and Verticillium wilt.