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KMID : 1098420040120030209
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Korean Journal of Medicinal Crop Science
2004 Volume.12 No. 3 p.209 ~ p.213
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Embryological Characteristics on Seed Sterility of Ligusticum chuanxiong Hoit.
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Park Chung-Heon
Lee Man-Sang
Namkoong Seung-Bak
Yu Hong-Seob
Park Hee-Woon
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Abstract
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Ligusticum chuanxiong is receiving much attentions as one of the important medicinal crops with the increasement of the crude drug demands. This study was conducted to obtain the basic informations of breeding of Ligusticum chuanxiong. Embryological characteristics were examined to elucidate the process of male and female gametophytic development and fertilization. Meiosis and nucleus division of megaspore and microspore were proceeded normally. With regard to the formation of female gametophyte, only a half of female gametophyte developed to normal egg apparatus. While another 50% showed abnormal egg apparatus with poly-nuclei or non-nuclei ovule. The pollens developed from the micros pore were formed more than 90 % of normal pollen. It was difficult to observe fertilization because ovule tissue was very compact and cell was extremely tiny, but could be easely observed proembryo and embryo formation. Only 30 percent developed into proembryo and subsequently into embryo, and the others were degenerated.
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KEYWORD
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Ligusticum chuanxiong, female gametophyte, egg apparatus, embryo
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