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Çѱ¹½Ä¹°ÇÐȸ / v.39, no.1, 1996³â, pp.71-77
´ç±ÙÀÇ ¹è¾ç¼¼Æ÷·ÎºÎÅÍ Çü¼ºµÈ ü¼¼Æ÷¹èÀÇ ´ÙÀÚ¿± ±¸Á¶
( Multicotyledonary Structure of Somatic Embryos Formed from Cell Cultures of Daucus carota L. )
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¹è¹ß»ý Ķ·¯½ºÀÇ ¼±¹ßÀº 1.0mg/L 2,4-D¸¦ ÷°¡ÇÑ MS ±âº»¹èÁö¿¡¼­ ¹è¾çÇÑ ´ç±Ù À¯½Ä¹°ÀÇ ¹èÃàÀýÆíÀ¸·ÎºÎÅÍ À¯µµµÈ Ķ·¯½º¿¡¼­ ÀÌ·ïÁ³´Ù. ü¼¼Æ÷¹è ¹ß»ýÀ» À¯µµÇϱâ À§Çؼ­ ¹è¹ß»ý Ķ·¯½º·ÎºÎÅÍ ¾ò¾îÁø ¼¼Æ÷±«´Â 2,4-D¸¦ Á¦°ÅÇÑ MS ¹èÁö¿¡ ¿Å°å´Ù. ¼¼Æ÷±«¸¦ 1.0mg/L 2,4-D ÷°¡¹èÁö¿¡¼­ 1ÁÖ°£ ±×¸®°í 2,4-D Á¦°Å ¹èÁö¿¡¼­ 2ÁÖ°£ ¹è¾çÇÑ ÈÄ¿¡ 2ÀÚ¿±¹èÀÇ ¹ß»ýÀº 63%¿¡ ±×ÃÆ°í ³ª¸ÓÁö´Â 1ÀÚ¿± 5%, 3ÀÚ¿± 21%, 4ÀÚ¿± 6%, 5ÀÚ¿± 5%, 6ÀÚ¿± 0.2% ¹× ³ªÆÈÇü ÀÚ¿± 1%ÀÇ ¹ß»ýºóµµ¸¦ ³ªÅ¸³Â´Ù. ü¼¼Æ÷¹èÀÇ ¹ß¾ÆÀ²Àº ´ÙÀÚ¿± ü¼¼Æ÷¹è¿¡¼­ º¸´Ù 2ÀÚ¿± ¹è¿¡¼­ ³ô¾Ò´Ù. ³ªÆÈÇü ÀÚ¿±ÀÇ Ã¼¼¼Æ÷¹è´Â °æ¿±ºÎ ¹ß»ý¾øÀÌ ÀÚ¿±°ú »Ñ¸®°¡ ´Ù¼Ò ½ÅÀå È®´ëµÇ´Âµ¥ ±×Ä¡´Â µî Á¤»óÀûÀ¸·Î ¹ß¾ÆµÇÁö ¸øÇß´Ù. ÇØºÎÇÐÀûÀÎ °üÂû¿¡¼­ ü¼¼Æ÷¹èÀÇ »Ñ¸®¿Í ȯ»ó ÀüÇü¼ºÃþÀº ¹èÃàÀÇ Áß°£ºÎÀ§¿¡¼­ ºÐÁöµÇ±â ½ÃÀÛÇϰí ÀÚ¿±ÀýÀ» °ÅÃļ­ ÀÚ¿±À¸·Î À̾îÁö´Âµ¥ ¹èÃà¿¡¼­ ÀüÇü¼ºÃþ¼ÓÀº ÀÚ¿±¼ö¿Í °°Àº ¼ö¿´´Ù. 1ÀÚ¿± ü¼¼Æ÷¹è´Â ´ÙÀÚ¿± ü¼¼Æ÷¹èÀÇ °¢°¢ÀÇ ÀÚ¿±º¸´Ù Å©°í ÀüÇü¼ºÃþ°ú ÇÔ²² ¸»±ÁÇü ÀÚ¿±À» °¡Áö°í ÀÖ¾ú´Ù. µû¶ó¼­ ü¼¼Æ÷¹èÀÇ ÀÚ¿±±¸Á¶´Â ÀüÇü¼ºÃþ ¹è¿­»óÅÂ¿Í ¹ÐÁ¢ÇÑ °ü·ÃÀÌ ÀÖ´Ù´Â °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.
Embryogenic callus was selected from callus induced from hypocotyl segment cultures of Daucus carota seedlings on MS basal medium supplemented with 1.0 mg/L 2,4-D. Cell clumps prepared from the embryogenic callus were transferred to MS medium without 2,4-D for somatic embryo development. Cotyledonary abnormalities were frequently observed on somatic embryos developed after the incubation of cell clumps in MS basal medium with 1.0 mg/L 2,4-D for one week and then subculture in the same medium but without 2.4-D for two weeks. The percentage of abnormalities was as follows: 5% one cotyledon, 21% three cotyledons, 6% four cotyledons, 5% five cotyledons, 0.2% six cotyledons and 1% trumpet-like cotyledons. On the other hand, the normal somatic embryo with two cotyledons appeared at 63%. The germination rate of somatic embryos was higher in two cotyledon somatic embryos than in multicotyledonary embryos. Trumpet-like somatic embryos did not germinate normally showing limited elongation and enlargement of roots and cotyledons without shoot development. From anatomical examination circular procambium in the root of somatic embryo began to branch around the middle regions of the hypocotyl which extended into the cotyledons through the cotyledonary nodes and the number of branched procambial strands in hypocotyl was equal to the number of cotyledons. Monocotyledonous somatic embryo always had larger cotyledon than that of somatic embryos with multicotyledons and had horseshoe-like cotyledons where the procambium was of the same structure.ucture.
 
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ü¼¼Æ÷¹è ¹ß»ý;ÀÚ¿±±¸Á¶;ÀüÇü¼ºÃþ ¹è¿­;¹ß¾Æ;´ç±Ù;somatic embry;cotyledonaty structure;procambial arrangement;gemination Daucus carota;
 
Journal of Plant Biology / v.39, no.1, 1996³â, pp.71-77
Çѱ¹½Ä¹°ÇÐȸ
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920118290)
¾ð¾î : Çѱ¹¾î
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