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한국환경생물학회 / v.20, no.4, 2002년, pp.303-308 
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( The Effect of 4Ca^{2+}$ on $Cd^{2+}$ -induced Physiological Toxicity in Commelina communis L. ) |
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| 초 록 |
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| 3-weeks old Commelina was transferred to and grown in Hoagland solution ($pm$ 100 $mu{M}$ $Cd^{2+}$, 100 $mu{M}$ $Cd^{2+}$ ＋ 100$mu{M}$ $Ca^{2+}$, 100 $mu{M}$ $Cd^{2+}$ ＋ 200 $mu{M}$ EGTA) for two weeks and then a number of physiological activities was investigated. $Cd^{2+}$ reduced total chlorophyll content up to 29% at a week and 75% at two weeks. In the treatment of $Cd^{2+}$ ＋ $Ca^{2+}$, the total chlorophyll content was reduced to 29% at a week and 80% at two weeks. $Cd^{2+}$ reduced 24% of Fv/Fm after two weeks. In case of $Cd^{2+}$ ＋ $Ca^{2+}$, Fv/Fm was reduced 55% at a week, but after two weeks, the plants were almost dead and Fv/Fm could not be measured. When EGTA was treated with $Cd^{2+}$, the value of Fv/Fm was not affected. There were no differences of water potential between the control and the treatment of $Cd^{2+}$+EGTA toy a week, but in other treatments. water potential was reduced. $Cd^{2+}$ reduced about 21% of water potential and $Cd^{2+}$ ＋ $Ca^{2+}$ reduced 43% of water potential after two weeks. $Cd^{2+}$ inhibited 21% of photosynthetic activity at a week and 32% at two weeks. In case of photosynthetic activity, $Cd^{2+}$ ＋ $Ca^{2+}$ inhibited 58% at a week and 73% at two weeks. $Cd^{2+}$+EGTA inhibited 15% of photosynthetic activity at a week and 21% at two weeks. Similar results were found in stomatal conductance. From the above results, it was observed that the treatment of $Ca^{2+}$ with $Cd^{2+}$ induced more reduction of a series of physiological responses than those of the treatment of $Cd^{2+}$ alone. Therefore, it could be concluded that $Ca^{2+}$ did not reduce the toxicity of $Cd^{2+}$, but enhanced $Cd^{2+}$ -induced physiological toxicities, but EGTA induced an decrease of $Cd^{2+}$ -induced physiological toxicities. |
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| 키워드 |
| cadmium-tocixities;calcium;Commelina;EGTA; |
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환경생물 / v.20, no.4, 2002년, pp.303-308
한국환경생물학회
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921713724)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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