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Çѱ¹½Ä¹°ÇÐȸ / v.38, no.2, 1995³â, pp.195-201
±Í¸®ÀÙÀÇ ±âÀúºÎ Àý°£ºÐ¿­Á¶Á÷¿¡¼­ ºÐÀÌÇÑ ¿øÇüÁúüÀÇ ¾ÏÈ£Èí Ȱ¼º¿¡ ¹ÌÄ¡´Â ABA¿Í $Ca^{2+}$ÀÇ ¾ïÁ¦È¿°ú
( Inhibitory Effects of ABA and $Ca^{2+}$ on Dark Respiration in Protoplasts Isolated from the Basal Intercalary Meristematic Tissues of Oat Leaves )
È«¿µ³²; ¼­¿ï´ëÇб³ ÀÚ¿¬°úÇдëÇÐ »ý¹°Çаú;
 
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º» ¿¬±¸´Â ±Í¸®ÀÙ ±âÀúºÎ Àý°£ ºÐ¿­Á¶Á÷ÀÇ ¿øÇüÁúü ¾ÏÈ£Èí¿¡ ¹ÌÄ¡´Â ABA¿Í Ä®½·ÀÇ È¿°ú¸¦ Á¶»çÇÏ¿´´Ù. µ¿½Ã¿¡ ¾ÏÈ£Èíµ¿¾È ¼¼Æ÷¸·³» Ä®½·Åë·Î ¹× Ä®¸ðµâ¸°ÀÇ °ü·Ã °¡´É¼ºÀ» Á¶»çÇϱâ À§ÇØ ¼¼Æ÷¸·ÀÇ Ä®½·Åë·Î Â÷´ÜÁ¦ÀÎ diltiazem(DTZ), verapamil(VPM), ¹× $LaCl_2$ ±×¸®°í Ä®½·-Ä®¸ðµâ¸° °áÇÕ ÀúÇØÁ¦ÀÎ trifluoperazine(TFP)ÀÌ ¿øÇüÁúü È£ÈíȰ¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ºÐ¼®ÇÏ¿´´Ù. Abscisic acid ´Üµ¶ 󸮽à $10^{-6};M$ ³óµµ¿¡¼­ 21%ÀÇ È£Èí¾ïÁ¦¸¦ º¸¿´À¸¸ç, ABA°¡ 󸮵ÇÁö ¾ÊÀº »óÅ¿¡¼­´Â Ä®½·¿¡ ÀÇÇÑ È£Èí°¨¼Ò Çö»óÀÌ °ÅÀÇ ³ªÅ¸³ªÁö ¾Ê¾Ò´Ù. ±×·¯³ª $10^{-6};M$ ABA Á¸Àç½Ã Ä®½·³óµµÀÇ Áõ°¡¿¡ µû¶ó ÇöÀúÇÑ È£Èí°¨¼Ò°¡ ÀϾ´Ù. Á¤µµÂ÷ÀÌ´Â ÀÖ¾úÁö¸¸ DTZ³ª VPM󸮷ΠABA¿Í Ä®½·¿¡ ÀÇÇØ ¾ïÁ¦µÇ¾ú´ø È£ÈíȰ¼ºÀÌ È¸º¹µÇ¾úÀ¸¸ç $LaCl_2$ 󸮽ÿ¡µµ $10^{-4};M$ ³óµµ¸¦ Á¦¿ÜÇϰí´Â À¯»çÇÑ °á°ú¸¦ º¸¿´°í TFP´Â $10^{-6};M$¿¡¼­ $10^{-4};M$ ³óµµ¹üÀ§¿¡¼­ 󸮳󵵰¡ Áõ°¡µÉ¼ö·Ï ABA¿¡ ÀÇÇÑ È£Èí¾ïÁ¦¸¦ ȸº¹½ÃÄ×´Ù. ÀÌ»óÀÇ °á°ú·ÎºÎÅÍ ABA´Â Ä®½·¿¡ ´ëÇÑ agonist·Î¼­ ¼¼Æ÷¸·ÀÇ Åõ°ú¼ºÀ» Áõ´ë½ÃÄÑ Ä®½· À¯ÀÔÀ» ÃËÁø½ÃŰ°í ±×·ÎÀÎÇØ À¯ÀÔµÈ Ä®½·ÀÌ Ä®¸ðµâ¸°°ú °áÇÕÇÏ¿© ±Í¸® ¿øÇüÁúü ¾ÏÈ£ÈíÀ» Á¶ÀýÇÏ´Â °ÍÀ¸·Î »ý°¢µÇ¾ú´Ù.
The present study was made of the effects of abscisic acid(ABA) and calcium ions on dark respiration in protoplasts isolated from the basal intercalary meristematic tissues of oat (Avena sativa L.) seedlings. The influences of calcium channel blockers diitiazem(DTZ), verapamil(VPM), and $LaCl_2$ and the calmodulin antagonist trifluoperazine(TFP) on protoplast respiration activities were also investigated in order to evaluate the possible involvement of calcium channels and calmodulin during the dark respiration. The ABA only caused an 21% inhibition of protoplast respiration at $10^{-6};M$, but the extent of inhibition was very low by calcium treatments in the absence of ABA. In the presence of $10^{-6};M$ ABA, however, this inhibition of respiration increased by the increment of calcium ions concentrations. Treatments of DTZ and VPM were all found to restore the calcium-dependent inhibition of protoplast respiration by ABA and it was the same in thc $LaCl_2$ treatment except at $10^{-4};M$. At concentration from $10^{-6};M;to;10^{-4};M$, TFP also restored an inhibition of respiration. These results support the possibility that ABA increases plasmalemma permeability to calcium ions which might then bind to calmodulin to regulate oat protoplast dark respiration.ration.
 
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¾ÏÈ£Èí;ABA;dark respiration;diltiazem;verapamil;trifluoperazine;
 
Journal of Plant Biology / v.38, no.2, 1995³â, pp.195-201
Çѱ¹½Ä¹°ÇÐȸ
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920117728)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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