The development of endosperm haustorium in watermelon (Citrulluslanatus) was observed,and the ultracytochemical localization of ATPase activity was carried out in the endosperm haustorium cells.

• 报道了西瓜(Citrulluslanatus)胚乳吸器发育过程，并对胚乳吸器细胞中的ATP酶进行了超微细胞化学定位。