Also,the filtrate of race O was highly acfive to cause death of corn root cap cells. There was a positive correlation with sensitivity of root cap cells to filtrates and susceptibility to the pathogen.

• O小种培养滤液对玉米根冠细胞具有强烈的致死作用,根冠细胞对培养滤液的敏感性与幼苗对病菌的感病性间存在明显的正相关。