금낭화(Dicentra spectabilis)의 배우체 형성 및 접합자배의 발달

Abstract

This study was carried out to obtain the basic informations on the characteristics ofgametophytes formation and embryo developement in Dicentra spectabilis. Microsporemother cells developed from archesporial cells, start meiosis when flower bud length reachesaround 1 mm, formed tetrahedral type tetrad. The 4 microspores were separated. They weredeveloped to male gametophytes, respectively. Megaspore mother cells were observed whenflower bud length was 4~5 mm. The developemental type of megaspore was polygonum andembryo sac was amphitropous. Three large and distinctive antipodals did not degeneratedand remained after embryo sac was developed. When the male and female gametophyteswas fully developed, the length of stamen and style was very similar or stamen was shorterabout 0.5 mm than that of style. This result indicates that self-fertilization can be occurredin this species. After fertilization, developing zygotic embryos showed various stages ofdevelopment from globular to cotyledonary embryos, and zygotic embryo in seed scatteringtime seemed to have an early cotyledonary stage.