When the maize is treated by EGTA or verapamil, the ABA contents of leaf, stem or root decrease and are not related to the ABA concentration in the sap whose changes are complex.

• EGTA、异博啶处理后玉米叶茎根中脱落酸含量降低，木质部汁液中脱落酸浓度与叶茎根脱落酸含量并没有明显相关性，表现出复杂变化；