Accumulation and components of sugars were affected evidently by AI and NI in muskmelon fruit, but the action of SS was weak. Sucrose accumulation accorded with the increase of SPS activity in sarcocarp of Elizabeth during ripe stage.

• AI、NI的活性变化对2种甜瓜果实中糖的积累和构成具有重要影响,SS对2种甜瓜果实中糖积累的作用较小,SPS活性升高与成熟期伊丽莎白果实中蔗糖的积累相一致。