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Çѱ¹ÀܵðÇÐȸ / v.25, no.1, 2011³â, pp.17-21
¹è¼ö¼ºÀÌ ´Ù¸¥ ÀÚ»ý ¹ö¹Â´Ù±×·¡½ºÀÇ ÈÞ¸é ÀüÈÄ Ç×»êÈ­ È¿¼ÒȰ¼º ¹× ¼¼Æ÷¸· ¾ÈÁ¤¼º º¯È­
( Antioxidant Enzyme Activity and Cell Membrane Stability of Korean Bermudagrass Genotypes Different in Ploidy at Dormant Stage )
À̱àÁÖ;ÀÌÇýÁ¤;¸¶±âÀ±;Àü¿µÁÖ;±èÀΰæ; ¸ñÆ÷´ëÇб³ ¿ø¿¹°úÇаú;ÃæºÏ´ëÇб³ ½Ä¹°ÀÚ¿øÇаú;¸ñÆ÷´ëÇб³ ¿ø¿¹°úÇаú;¸ñÆ÷´ëÇб³ ¿ø¿¹°úÇаú;¸ñÆ÷´ëÇб³ ¿ø¿¹°úÇаú;
 
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±âÁ¸ º¸°íµÈ ¹Ù¿¡ ÀÇÇϸé Çѱ¹ ÀÚ»ý ¹ö¹Â´Ù±×·¡½º´Â ±ºÁý ³»¿¡¼­ ÇüÅÂÇÐ, »ýÀ° Ư¼º, ¼¼Æ÷ÇÐÀû Ư¼º¿¡ ´ëÇØ À¯ÀüÀûÀ¸·Î ¸Å¿ì ´Ù¾çÇÑ º¯À̸¦ º¸¿©ÁÖ¾ú´Ù. ¹ö¹Â´Ù±×·¡½ºÀÇ ¿°»öü ¼ö¿Í ÇÙ DNA ·®¿¡ µû¸£¸é ¹è¼ö¼º ¼öÁØÀÇ ¹üÀ§°¡, 3¹è ü(2n=3x), 4¹èü(2n=4x), 5¹èü(2n=5x), 6¹èü(2n=6x)·Î ³ªÅ¸³µ¾ú´Ù. º» ¿¬±¸¿¡¼­´Â Çѱ¹¿¡¼­ ÈÞ¸éÀÌ À¯µµµÇ´ÂÀú¿Â°ú ªÀº ÀÏÀå¿¡ ´ëÇÑ Ç×»êÈ­È¿¼Ò(superoxide dismutase, catalase, peroxidase, ascorbate peroxidase)ÀÇ ´Ù¾çÇÑ ¹ÝÀÀ°ú °¢ ¹ö¹Â´Ù±×·¡½º ¼¼Æ÷ÇüÀÇ ¼¼Æ÷¸· ¾ÈÁ¤¼ºÀ» Á¶»çÇÏ¿´´Ù. ¸ðµç Ç×»êÈ­È¿¼Ò´Â ÈÞ¸é ±â°£µ¿¾È ³ô°Ô ³ªÅ¸³µÀ¸³ª, °ú»êÈ­¼ö¼Ò¸¦ ¹°°ú »ê¼Ò ºÐÀÚ·Î º¯È¯½ÃŰ´Â Çð±â¸¦ ÇÔÀ¯ÇÑ Ä«Å»¶óÁ¦´Â 6¹èü ¹ö¹Â´Ù±×·¡½º¸¦ Á¦¿ÜÇÑ ¼¼ °³ÀÇ ¼¼Æ÷Çü¿¡¼­ ÈÞ¸éÀÌ °³½ÃµÇ±â Àü¿¡ Ȱ¼ºÈ­µÇ¾ú´Ù. »ó´ëÀûÀ¸·Î ¼¼¿±ÀÌ¸ç »ýÀ°¼Óµµ°¡ ºü¸¥3¹èü¿Í 4¹èü´Â superoxide dismutase¿Í peroxidase È¿¼ÒÀÇ È°¼ºÀÌ Áõ°¡µÊÀ» È®ÀÎÇÏ¿´´Ù. ¼ö»ê±â¸¦ °¡Áø ¶óµðÄ®¿¡ ÀÇÇØ ¼Õ»óÀ» ¹ÞÀº ¼¼Æ÷¸·¿¡¼­ ÁöÁú°ú»êÈ­ÀÇ »ê¹°ÀÎ ¸»·Ðµð¾Ëµ¥È÷µå(MDA)´Â ¿Âµµ°¡ °¨¼ÒÇÔ¿¡ µû¶ó ¸ðµç ¼¼Æ÷Çü¿¡¼­ Áõ°¡µÇ¾ú°í, ¹æ¾îÀûÀÎ Ç×»êÈ­È¿¼Ò¸¦ ´õ °®°í ÀÖ´Â 3¹èü¿Í 4¹èü´Â MDA »ý»êÀÌ ÇöÀúÇÏ°Ô ´õ ³·°Ô ³ªÅ¸³µ´Ù. ÀüÇØÁú À¯ÃâÀº 5¹èü¿Í 6¹èü¿¡¼­ ´õ ³ô¾Ò´ø °Í°ú À¯»çÇϰÔ, Àú¿ÂÀÌ Àû¿ëµÉ ¶§ ¿Ü°ß»óÀ¸·Î ¼¼Æ÷¸·¿¡ ´õ ¼Õ»óÀ» ¹Þ´Â °Í °°¾Ò´Ù. ½ÇÇè °á°ú, ¼­·Î ´Ù¸¥ ¼¼Æ÷Çü(cytotype)ÀÇ Ç×»êÈ­ ¹ÝÀÀÀº À¯ÀüÀûÀ¸·Î ƯÀÌÀûÀ̸ç, ÀÌ´Â ¹ö¹Â´Ù±×·¡½º¿¡¼­ Àú¿Â ÀúÇ×¼º°úÀÇ ¿¬°ü¼ºÀ» ºÐÀÚ ¼öÁØ¿¡¼­ ´õ ¿¬±¸ÇÏ´Â °ÍÀÌ ÇÊ¿äÇÏ´Ù.
Korean bennudagrass collections showed diverse genetic variations in their morphology, growth habit, and cytological aspects. Chromosome number and nuclear DNA content of the bennudagrasses indicated a ploidy level ranging from triploid (2n=3x) to hexaploid (2n=6x). In this study, we investigated the different responses of antioxidant enzymes (superoxide dismutase, catalase, peroxidase, ascorbate peroxidase) and cell membrane stability of those bennudagrass cytotypes to lower temperature and shorter day length, which meets a dormant induction in Korea. All the antioxidant enzymes were found to be higher during dormant stage, while the heme-containing catalase which converts hydrogen peroxide ($H_2O_2$) to water and oxygen molecules was activated before dormant initiation in the three cytotypes except for hexaploid bennudagrass. The triploid and tetraploid which exhibited relatively finer leaves and a rapid establishment speed were found to show increased activities of superoxide dismutase and peroxidase enzyme. The malondialdehyde(MDA) which is a product of lipid peroxidation in the cell membrane damaged by the hydroxyl radical was increased in all cytotypes as temperature declined, and tri- and tetraploids which had more protective antioxidant enzymes demonstrated a significantly lower MDA production. Similarly electrolyte leakage was higher in penta- and hexaploidy, seemingly more damage to cell membrane when low temperature was implemented. Results indicated that antioxidant responses of different cytotypes were genetically specific, which needs to be investigated the relevance with the low temperature tolerance in the bermudagrass further at the molecular level.
 
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¹ö¹Â´Ù±×·¡½º cytotype;ÀüÇØÁúÀ¯Ãâ;Àú¿Â ½ºÆ®·¹½º;Ȱ¼º»ê¼ÒÁ¾;Bermudagrass cytotype;Electrolyte leakage;Low temperature stress;Malondialdehyde;Reactive oxygen species;
 
Çѱ¹ÀܵðÇÐȸÁö / v.25, no.1, 2011³â, pp.17-21
Çѱ¹ÀܵðÇÐȸ
ISSN : 1229-3253
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201128451816818)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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