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Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.26, no.4, 2008³â, pp.271-278
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C$_3$ ½Ä¹°°ú CAM ½Ä¹°¿¡¼ ¼öºÐ ½ºÆ®·¹½ºÀÇ È¿°ú
( The Effects of Water Stress on C$_3$ Plant and CAM Plant ) |
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| The differences of several kinds of physiological responses between Commelina communis (C$_3$ plant) and Sedum sarmentosum (CAM plant: Crassulacean Acid metabolism) when both plants were exposed to water stress for 3 weeks were investigated. In case of Commelina it was shown a clear loss of water to 12% in three weeks, but no changes were observed in Sedum. Total chlorophyll content was also reduced to 57% in Commelina but not clear changes of chlorophyll content in Sedum. were observed for three weeks. In chlorophyll fluorescence experiments Fv/Fm ratios were reduced to 19% in Commelina, but no changes were observed in Sedum. There were very sensitive responses according to the different KCl concentrations and the stomatal aperture of epidermal strips was 12.8 ${mu}m$ at 200 mM KCl in Commelina, but less than 3 ${mu}m$ was observed at the same KCl concentration in Sedum. In addition, there were no chloroplasts in guard cells of Sedum, but most plants had chloroplasts including Commelina. From the above results, the ability of water stress resistance in Sedum. could be come from slow physiological metabolism including growth and less loss of water through unique stomatal characteristics. |
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| Ű¿öµå |
| C$_3$ and CAM plants;Commelina communis;photosynthesis;Sedum sarmentosum;stomata;water stress; |
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ȯ°æ»ý¹° / v.26, no.4, 2008³â, pp.271-278
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200820258463190)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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