The morphogenesis of sexual organs in inflorescence of sweet corn was observed by using SEM, and the contents of iPAs, ZRs, DHZRs, zearalenone (ZEN), GA 3, ZT and IAA in maize plant were detected by using ELISA and HPLC separately. The results showed that the development of flowers of both sexes passed through asexual, bisexual and unisexual stages. The contents of iPAs, ZRs, GA 3 and ZEN in tassels were significantly higher than in ears during the elongation of meristem and spikelet initiation. At the st...