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Çѱ¹ÀÚ¿ø½Ä¹°ÇÐȸ / v.8, no.3, 1995³â, pp.237-246
À¯ÀÚ (Citrus junos SIEB.) ÀÇ ¹ß»ý´Ü°è¿¡ µû¸¥ ¹Ì¼¼±¸Á¶Àû Ư¼º
( Ultrastructural Characteristics of Developmental Stages During in vitro Regeneration in Citrus junos SIEB. )
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In this study, the callus was induced and regenerated from the immature embryo and ultrastructural characteristics of developmental stages in Citrus junos SIEB, were investigated. The yellowish callus was induced by 5 to 6 week of culture of citrus. In proliferation callus after 6 weeks of culture, large vacuole was formed by fusion between adjacent small ones. In the non-embryogenic callus cultured for 12weeks, re-differentiated cells of callus showed the large nucleus with globular nucleus and amyloplast with large size of starches. In the embryogenic callus cltured for 14-16 weeks, the active exocytosis occurred in cells, secretory vesicles appeared on cell membrane and small particles from cytoplasm were released to intercelluar space. In the embryogenic callus cultured for 24 weeks, a sperical type of chloroplast bounded on cytoplasm by double membrane and typical grana was dispersed equally among matrix. In the normal plantlet after 26 weeks of culture, a lot of vessels and companion cells apperaed in the leaf cell of plantlet. In the normal plantlet after 30 weeks of culture, the immature leaf showed many small companion cells, sieve tubes and central vacuole. Also, the secondary vacuole protruded into the central vacuole and elongated chloroplasts near plasma membrane. In the matured plant habituated on the soil, palisada tissue composed of orderly arranged cells contained the nucleus in the center of the cell and large vacuoles on either side of the nucleus.
 
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Citrus Junes SIEB Non-embryogenic Callus Embryogenic callus;
 
Çѱ¹ÀÚ¿ø½Ä¹°ÇÐȸÁö / v.8, no.3, 1995³â, pp.237-246
Çѱ¹ÀÚ¿ø½Ä¹°ÇÐȸ
ISSN : 1226-3591
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920278097)
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