The Comparative Study On Pistil Development In Two Different Kinds Of Flowers Of Xanthoceras Sorbifolia Bunge

Xanthoceras sorbifolia Bunge is polygamous flower and it is andromonoecious. The two kinds of flowers (male flower and bisexual flower) have similar structures of floral organ during the early stage of sex differentiation. They both have stamen and pistil. But after sex differentiation the florets in lateral buds become male flowers because selective abortion happens in pistil.Some morphological and anatomical observations on both male and bisexual flowers were made in different developmental stages. The right stage when the selective abortion happened in male flower was ascertained preliminarily. The result was that the ovule in ovary of male flower abored when the megasporocyte was not formed in nucellar tissue.Some special isozyme bands found in the two types of flowers in our experiment were relative to the physiological and biochemical changes during the pistil development or abortion.The differential proteins related to the abortion were also found after the result of tow-dimentional polyacrylamid gel electrophoresis was analyzed. These proteins may be related to the wilting of ovary and the abnormal development of ovule. Other proteins which may promote expanding of ovary and development of ovule were also found. They were inferred to be the proteins which was related to normal development of pistil.The structure and function of these proteins and isozyme bands need to be analyzed in advanced researches and finally special genes related to the abortion will be found.