Carpel of cucumber (Cucumis sativus. L) male flowers maintains early primordia characteristics during organ development

Diclinism is not only an interesting natural phenomenon in plant kingdom, b ut also of significance in the yield of crops, e.g. cucumber and watermelon . Cucumber has been a model plant for studying the diclinism for decades. H owever, it is still obscure how the carpel primordia of cucumber male flowe r undergo the developmental processes after the initiation of their develop ment, By showing morphological alternation, metabolic activity, as well as CFL gene expression, the present study demonstrated that the carpel primord ia of cucumber male flowers maintained the characteristics of primordium un til anthesis, although it developed significantly slower than that of the f emale flowers.