串珠镰刀菌是小麦根腐病病原菌之一。利用串珠镰刀菌毒素对小麦种子萌发及幼苗根系胁迫处理,研究表明:毒素对小麦萌发率和胚根、胚芽生长起着明显的抑制作用,且毒素浓度越高,抑制效果越明显。毒素对小麦根系毒害作用明显,毒素浓度越高,处理时间越长,小麦根系相对电导率越高。说明串珠镰刀菌毒素是小麦根腐病的致病因子,可以利用毒素筛选抗病小麦品种。 Fusarium is one of the pathogen of wheat root rot. The use of Fusarium moniliforme toxin germination of wheat seeds and seedling root stress treatment studies have shown that: toxins on wheat germination rate and radicle, embryo growth played a significant inhibitory effect, and the higher the concentration of toxins, the more obvious inhibitory effect. Toxins had obvious toxic effects on wheat root system. The higher the concentration of toxin and the longer the treatment time, the higher the relative conductivity of wheat roots. The Fusarium moniliforme toxin is a causative factor of wheat root rot, which can be used to screen resistant wheat cultivars.