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Formation of Gametophytes and Development of Zygotic Embryo in Dicentra spectabilis  

Sim Ock-Kyeong (Panaxia Co. Ltd.)
Lee Kang-Seop (Panaxia Co. Ltd.)
Kim Ee-Yup (Panaxia Co. Ltd.)
Eun Jong-Seon (Dept. of Horticulture, Chonbuk National Univ.)
Publication Information
Korean Journal of Plant Resources / v.18, no.2, 2005 , pp. 302-308 More about this Journal
Abstract
This study was carried out to obtain the basic informations on the characteristics of gametophytes formation and embryo developement in Dicentra spectabilis. Microspore mother cells developed from archesporial cells, start meiosis when flower bud length reaches around 1 mm, formed tetrahedral type tetrad. The 4 microspores were separated. They were developed to male gametophytes, respectively. Megaspore mother cells were observed when flower bud length was $4{\sim}5\;mm$. The developemental type of megaspore was polygonum and embryo sac was amphitropous. Three large and distinctive antipodals did not degenerated and remained after embryo sac was developed. When the male and female gametophytes was fully developed, the length of stamen and style was very similar or stamen was shorter about 0.5 mm than that of style. This result indicates that self-fertilization can be occurred in this species. After fertilization, developing zygotic embryos showed various stages of development from globular to cotyledonary embryos, and zygotic embryo in seed scattering time seemed to have an early cotyledonary stage.
Keywords
bleeding heart; gametophytes; megaspore; microspore; self-fertilization; embryo;
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