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Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.18, no.1, 2000³â, pp.63-67
´ßÀÇÀåÇ® ³» $Cd^2+$ÀÇ ºÐÆ÷¿Í »ý¸®Àû µ¶¼º
( The Distribution of $Cd^2+$ and its Physiological Toxicity in Commelina communis L. )
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$Cd^2+$ÀÌ ´ßÀÇÀåÇ®ÀÇ ¿±·Ï¼Ò ÇÔÀ¯·®, ±â°ø Å©±â, ¼öºÐÆÛÅÙ¼È, À̿ ¼ö¼Û¿¡ ´ëÇÑ È¿°ú¿Í ±â°ü³»ÀÇ Ä«µå¹ÅÀÇ ÃàÀû¿¡ ´ëÇÏ¿© Á¶»çÇÏ¿´´Ù. 3ÁÖ°£ ¼ºÀåÇÑ ´ßÀÇÀåÇ®À» Hoagland¿ë¾×(${pm}5mM Cd^2+$)¿¡¼­ 4ÀÏ µ¿¾È ¼ö°æ¹è¾çÇÏ¿´´Ù. Ä«µå¹ÅÀº ½Ä¹°ÀÇ »Ñ¸®, Áٱ⠱׸®°í ÀÙ µî ¸ðµç ±â°ü¿¡ ÃàÀûµÇ¾ú´Ù. »Ñ¸®·ÎºÎÅÍÀÇ °Å¸®¿Í ÀÙÀÇ ³ªÀÌ µîÀÌ Ä«µå¹Å ºÐÆ÷¸¦ °áÁ¤Áþ´Â °¡Àå Áß¿äÇÑ ¿ä¼Ò¿´´Ù. ´ëºÎºÐÀÇ $Cd^2+$ÀÌ »Ñ¸®·ÎºÎÅÍ °¡Àå ÀÎÁ¢ÇÑ ¼º¼÷ÇÑ Ã¹ ¹øÂ° ÀÙ¿¡ ÃàÀûµÇ¾ú´Ù. ÀÙ¿¡ $Cd^2+$ÀÇ ÃàÀûÀº ¿©·¯ »ý¸®ÀûÀÎ ´ë»çÀÇ È°¼º¿¡ °¨¼Ò¸¦ °¡Á®¿Ô´Ù. Ä«µå¹Å 󸮴 70%ÀÇ ¿±·Ï¼Ò ÇÔ·® °¨¼Ò¸¦ °¡Á®¿ÔÀ¸¸ç, ¿±·Ï¼Ò a/bºñµµ 2·Î °¨¼ÒÇÏ¿´´Ù. $Cd^2+$Àº ¶ÇÇÑ 20%ÀÇ ¼öºÐÆÛÅÙ¼ÈÀ» °¨¼Ò½ÃÄ×´Ù. Ä«µå¹Å 󸮴 ¿©·¯ ±¤µµ(100-l,000$mu$mol $Em^-2s^-1$)¿¡¼­ ±¤ÇÕ¼º Ȱ¼ºÀ» ¾à 60% °¨¼Ò½ÃÄ×À¸¸ç ±â°øÀüµµµµµµ ºñ½ÁÇÑ ¹ÝÀÀÀ» º¸¿´´Ù. µû¶ó¼­, $Cd^2+$ÀÌ ´ßÀÇÀåÇ®ÀÇ Àü¹ÝÀûÀÎ »ý¸®Àû Ȱ¼ºÀ» °¨¼Ò½ÃŰ°Å³ª Â÷´ÜÇÏ´Â °ÍÀ¸·Î ÃßÃøµÈ´Ù.
The effect of $Cd^2+$ on chlorophyll content, water potentials, ion transport, photosynthesis, stomatal apertures and $Cd^2+$ accumulation of organs in Commelina communis was investigated. 3-weeks old Commelina. communis was transferred to and grown in Hoagland solution in the presence or absence of 5 mM $Cd^2+$ for 4 days. $Cd^2+$ was accumulated in all parts of the organs including leaves, roots and stem. The proximity from the root and the age of leaf were significant factors responsible for the distribution of cadmium. Most of $Cd^2+$ was accumulated in the first leaf which was the nearest from the root. $Cd^2+$) accumulation in the leaves led to significant reductions in a series of physiological metabolism. $Cd^2+$ reduced total chlorophyll content up to 70%, and changed chlorophyll a/b ratio to 2. $Cd^2+$ also reduced about 20% of water potential. The treatment of $Cd^2+$ showed about 60% inhibition of photosynthetic activity when measured at various light intensity (100-1,000 $mu$mol $Em^-2s^-1$). Similar effect was found in terms of stomatal conductance. Therefore, it could be concluded that the treatment of $Cd^2+$ decrease or block various physiological activities. [Cadmium, Photosynthesis, Stomatal conductance].
 
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ȯ°æ»ý¹° / v.18, no.1, 2000³â, pp.63-67
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200011921491613)
¾ð¾î : Çѱ¹¾î
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