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Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ / v.11, no.3, 2002³â, pp.139-143
¿°ºÐ°ú Àú¿Â¿¡ ´ëÇÑ ³»¼ºÁõÁøÀ» À§ÇÑ GST À¯ÀüÀÚÀÇ °ú¹ßÇö
( Increase of Salt and Low Temperature Tolerance by Overexpressing Glutathione S-Transferase (GST) Gene )
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¸ñÈ­ÀÇ Glutathione S-Transferase(GST) cDNA¸¦ cloningÇÑ µÚ ´ã¹è½Ä¹°Ã¼¿¡¼­ °ú¹ßÇö½ÃŲ µÚ À¯ÀüÀÚÀÇ ±â´ÉÀ» ºÐ¼®ÇÏ¿´´Ù. Northern blot ºÐ¼®À¸·Î ¸ñÈ­ÀÇ GST À¯ÀüÀÚ°¡ ¼º°øÀûÀ¸·Î ´ã¹è½Ä¹°Ã¼ÀÇ ¿°»öü¿¡ µµÀÔµÈ °ÍÀ» È®ÀÎÇÏ¿´´Ù Type I Type IIÀÇ Àü»çüµéÀÌ ÀÎÁöµÇ¾ú°í ÀÌ º¸°í¿¡¼­´Â Type II Àü»çüµéÀÇ ¿ªÇÒÀ» ±â¼úÇÏ¿´´Ù. Type II Àü»çüµéÀ» ¹ßÇöÇÏ´Â ÇüÁúÀüȯ ½Ä¹°Ã¼µéÀº ¾ß»ýÇü ¶Ç´Â ºñÇüÁúÀüȯü¿Í ºñ±³ÇÏ¿´À» ¶§ ¾à 1.5¹è ÀÌ»óÀÇ GST È¿¼ÒȰ¼ºÀ» ³ªÅ¸³»¾ú´Ù. GST È¿¼ÒÀÇ È°¼ºÀº 1-chloro-2,4-dinitrobenzene (CDNB)¿Í ±Û·çŸġ¿ÂÀ» ±âÁú·Î »ç¿ëÇÏ¿© ÃøÁ¤ÇÏ¿´´Ù. ´ã¹è½Ä¹°Ã¼¿¡¼­ ¸ñÈ­ GST CDNAÀÇ °ú¹ßÇöÀº ÀÌ À¯ÀüÀÚ°¡ ±â´ÉÀ» °®´Â ´Ü¹éÁú·Î ¹ø¿ªÀÌ µÉ ¼ö°¡ ÀÖ´Ù´Â °ÍÀ» º¸¿©ÁØ´Ù. ÇüÁúÀüȯµÈ ´ã¹è À¯¹¦¸¦ Àú¿Â($15^{circ}C$)°ú ±¤ÀÌ ÀÖ´Â »óÅ¿¡¼­ Ű¿ö GSTÀ¯ÀüÀÚÀÇ ¿ªÇÒ¿¡ ´ëÇÑ ±â´ÉÀ» ½ÃÇèÇÏ¿´´Ù. GST À¯ÀüÀÚÀÇ ÇüÁú ÀüȯüµéÀº ´ëÁ¶±¸ÀÇ À¯¹¦µé°ú ºñ±³ÇÏ¿© º¸¾ÒÀ» ¶§ ¼ºÀåÀÌ ÁÁ¾Ò´Ù. ¼Ò±Ý¿¡ ´ëÇÑ ³»¼º ½ÃÇè¿¡¼­µµ È¿°ú¸¦ º¸¿´´Ù. 0, 50, 100, 150, and 200 mM NaCl³óµµ¿¡¼­ »ýÀå½ÃÇèÀ» ÇÏ¿´´Ù. 50, 100 mM NaCl³óµµ¿¡¼­ GST ÇüÁúÀüȯ À¯¹¦µéÀº ¼ºÀåÀÌ ´ëÁ¶±¸¿¡ ºñÇÏ¿© À¯ÀǼºÀ» º¸¿´À¸³ª 0, 150, ±×¸®°í 200mMÀÇ ¼Ò±Ý³óµµ¿¡¼­´Â ¼ºÀåÀÇ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.
Cotton Glutathione S-Transferase (GST: EC 2.5.1.18) was cloned and overexpressed in tobacco (Nicotiana tabacum) plants. Northern blot analysis confirmed the successful transformation of cotton gst gene in tobacco plant. Type I and Type ll transcript patterns were identified in transgenic tobacco plants and only Type I transcripts were discussed in this paper, The activity of GST in the type II transgenic plants was about 1.5-fold higher than those of the wild type and non-expresser by using 1-chloro-2,4-dinitrobenzene (CDNB) and reduced glutathione as the substrate. The expression of cotton GST in tobacco plants proved that Gh-5 could be translated into functional protein. Type II transgenic plants produced functional GST in the cells. The effects of cotton GST in the seedlings was evaluated by growing the control and transgenic seedlings at $15^{circ}C$ in the growth chamber in the light. Overexpressors were grown well compared to the control plants (non-expressors). lo test far tolerance to salinity, seeds of Gh-5 overexpressors and the wild type Xanthi seedlings were grown at 0, 50, 100, 150, and 200 mM NaCl solution. Gh-5 transgenic seedlings showed higher growth rate over control seedlings on 50 and 100 mM NaCl solution. There was no difference in growth rate at 150 and 200mM NaCl concentration.
 
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Àú¿Â;¿°ºÐ;°ú¹ßÇö;³»¼º;Glutathione S-transferases (GST);low temperature;overexpession;salinity;
 
»ý¹°È¯°æÁ¶ÀýÇÐȸÁö / v.11, no.3, 2002³â, pp.139-143
Çѱ¹»ý¹°È¯°æÁ¶ÀýÇÐȸ
ISSN : 1229-4675
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211922407281)
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