|
|
|
Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.20, no.3, 2002³â, pp.205-215
|
Á߯ÄÀڿܼ±¿¡ ´ëÇÑ ³²±Ø»ê ÇØÁ¶·ùÀÇ ±¤ÇÕ¼º ¹× Àڿܼ± Èí¼ö¹°Áú Çü¼º ¹ÝÀÀ
( Photosynthesis and Formation of UV-absorbing Substances in Antarctic Macroalgae Under Different Levels of UV-B Radiation ) |
| ÇÑÅÂÁØ;¹Úº´Á÷;ÇÑ¿µ¼®;°¼ºÈ£;ÀÌ»óÈÆ; ÀÎõ´ëÇб³ »ý¹°Çаú;ÀÎõ´ëÇб³ »ý¹°Çаú;ÀÎõ´ëÇб³ »ý¹°Çаú;Çѱ¹ ÇØ¾ç¿¬±¸¿ø ±ØÁö¿¬±¸¼¾ÅÍ;Çѱ¹ ÇØ¾ç¿¬±¸¿ø ±ØÁö¿¬±¸¼¾ÅÍ;
|
|
|
 |
|
| |
| ÃÊ ·Ï |
| ³²±Ø¿¡ »ýÀ°ÇÏ´Â 5Á¾ÀÇ È«Á¶·ù(Curdiea racouitzae, Gigartina skottsbergii, Mazzaella obovata, Myriogramme manginii, Palmaria decipiens)¸¦ ´ë»óÀ¸·Î Àΰø Áᒎ Àڿܼ±°ú ž籤¼±¿¡ ´ëÇÑ Á¾º° »ý¸®Àû ¹ÝÀÀÀ» ±¤ÇÕ¼ºÀ̶ó´Â ÆÄ¶ó¹ÌÅ͸¦ »ç¿ëÇÏ¿© Á¶»ç ¿¬±¸ÇÏ¿´´Ù. ½ÇÇè½Ç¿¬±¸ °á°ú, Á¾°£¿¡ Áᒎ Àڿܼ±¿¡ ´ëÇÑ ³»¼º Â÷À̰¡ È®ÀεǾúÀ¸¸ç ÀÌ·¯ÇÑ Â÷ÀÌ´Â °¢ Á¾µéÀÌ Ã¤ÁýµÇ±â Àü¿¡ ¼½ÄÇϰí ÀÖ¾ú´ø ¼ö½É°ú ¸Å¿ì ¹ÐÁ¢ÇÑ °ü°è°¡ ÀÖ¾î¼ 20-30mÀÇ ¼ö½É¿¡¼ äÁýµÈ M. manginii¿Í P. decipiensÀÇ Àڿܼ± ³»¼ºÀÌ ´Ù¸¥ Á¾µé¿¡ ºñÇÏ¿© ÀÛ°Ô ³ª¿Ô´Ù. º» ¿¬±¸ °á°ú´Â ¼½ÄÁö ÁÖº¯ÀÇ ±¤È¯°æÀÌ ÇØÁ¶·ùÀÇ Àڿܼ± ³»¼ºÀ» °áÁ¤ÇØ ÁÖ´Â ÇÑ ¿äÀÎÀ̶ó´Â °¡¼³À» ÀÔÁõÇØÁÖ¾úÀ» »Ó ¾Æ´Ï¶ó Çü±¤ º¯È¸¦ ÀÌ¿ëÇÑ ±¤ÇÕ¼º ÃøÁ¤¹ýÀº Àڿܼ± ³»¼ºÀ» ŸÁøÇϴµ¥ ÀÖ¾î¼ ¸Å¿ì ½Å¼ÓÇÏ°í ºñÆÄ±«ÀûÀÎ ¹æ¹ýÀ¸·Î ÀÌ¿ëµÉ ¼ö ÀÖÀ½À» ÀÔÁõÇÏ¿´´Ù. µÎ Á¾ÀÇ ÈïÁ¶·ù(M. manginii, P. decipiens)¸¦ ´ë»óÀ¸·Î ž籤¼± ÇÏ¿¡¼ÀÇ ±¤ÇÕ¼º È¿À²À» °üÂûÇÑ °á°ú, Á¤¿À¿¡ ÃÖÀú ±¤ÇÕ¼ºÀ» º¸ÀÎ ¹Ý¸é Àú³á¿¡´Â ±¤ÇÕ¼º ´É·ÂÀÌ È¸º¹µÇ´Â Çö»óÀ» ³ªÅ¸³»¾ú´Ù. À̰°Àº µ¿ÀûÀÎ ±¤ÀúÇØ Çö»ó(dynamic photoinhibition)Àº ÀÏÁ¾ÀÇ ±¤ÀûÀÀ ´É·ÂÀ¸·Î¼ ½Ä¹°ÀÌ ºñ±³Àû °ÇÑ Å¾籤¼±¿¡ ³ëÃâµÈ Áö¿ª¿¡ ¼º°øÀûÀ¸·Î ¼½ÄÇϴµ¥ Å©°Ô ±â¿©ÇÏ´Â °ÍÀ¸·Î »ç·áµÈ´Ù. º» ¿¬±¸¿¡¼´Â ¶ÇÇÑ Å¾籤¼±³» Á߯ÄÀڿܼ± Æ÷ÇÔ À¯¹«¿¡ µû¶ó ±¤ÇÕ¼º ȸº¹ ¼Óµµ¿¡ Â÷À̰¡ ³ª´Â °ÍÀ» º¼ ¼ö ÀÖ¾ú´Âµ¥ Á߯ÄÀڿܼ±ÀÌ Æ÷ÇÔµÈ ÅÂ¾ç ±¤¼± ÇÏ¿¡¼´Â ±¤ÇÕ¼ºÀÇ È¸º¹ÀÌ ´À¸° ¹Ý¸é, Áᒎ Àڿܼ±ÀÌ Á¦°ÅµÈ Á¶°Ç¿¡¼´Â ±¤ÇÕ¼ºÀÌ ºñ±³Àû »¡¸® ȸº¹µÇ´Â °ÍÀ» °üÂûÇÒ ¼ö ÀÖ¾ú°í ÀÌ´Â Áᒎ Àڿܼ±ÀÌ ±¤ÇÕ¼º ȸº¹ ±âÀÛÀ» Áö¿¬½ÃŰ´Â ÀÛ¿ëÀ» ÇÑ °ÍÀ¸·Î ÇØ¼®µÉ ¼ö ÀÖ´Ù. ¾ß¿Ü¿¡¼ Àڿܼ± ¹Î°¨¼ºÀ» ºñ±³ÇÑ °á°ú, P. decipiens°¡ M. manginii¿¡ ºñÇÏ¿© Àڿܼ± ³»¼ºÀÌ Å« °ÍÀ¸·Î ³ªÅ¸³µ´Âµ¥, µÎ Á¾ °øÈ÷ Á¶°£´ë·ÎºÎÅÍ Á¶ÇÏ´ë »óºÎ±îÁö ¼½ÄÇÏ´Â Á¾ÀÓ¿¡µµ ºÒ±¸Çϰí ÀÌ·¯ÇÑ ³»¼ºÂ÷À̸¦ º¸ÀÎ ÀÌÀ¯´Â Àڿܼ± Èí¼ö¹°ÁúÀÇ Á¤·®ÀûÀÎ Â÷ÀÌ¿¡ ±âÀÎÇÑ´Ù°í ÇÒ ¼ö ÀÖ´Ù. M. manginii¿Í P decipiens¿¡¼ ¹ß°ßµÈ Àڿܼ± Èí¼ö¹°ÁúÀÇ ¾çÀº ¾à 1:2 Á¤µµÀÇ ºñÀ²À» º¸¿´´Âµ¥ ÀÌ·¯ÇÑ Á¤·®Àû Â÷À̰¡ Àڿܼ± ¹Î°¨¼º¿¡ ±â¿©ÇÑ °ÍÀ¸·Î »ç·áµÈ´Ù. º» ¿¬±¸¿¡¼´Â ¶ÇÇÑ °èÀýº° ±×¸®°í äÁý ¼ö½Éº°·Î Àڿܼ± Èí¼ö¹°ÁúÀÇ Á¤·®Àû Â÷À̸¦ ¹ß°ßÇÒ ¼ö ÀÖ¾ú´Âµ¥ ž籤¼±ÀÌ Ç³ºÎÇÑ ¿©¸§Ã¶¿¡ ±×¸®°í °í±¤·®ÀÌ µµ´ÞµÇ´Â ¼ö½É ¾èÀº °÷¿¡ ¼½ÄÇÏ´Â °³Ã¼°¡ ´õ¿í ¸¹Àº ¾çÀÇ Àڿܼ± Èí¼ö¹°ÁúÀ» ÇÔÀ¯ÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
|
| Effects of artificial and solar W-B radiation on five rhodophytes (Curdiea racovitzae, Gigaytina skottsbergii, Mazzaella obovata, Myriogramme manginii, Palmaria decipiens) from Antarctica have been investigated using PAM fluorescence in laboratory and in the field. Laboratory studies showed that there were significant differences in the UV sensitivity between different species, and that the differences appeared to be correlated with the depth of collection of the specimens. It was apparent from the observations that the samples such as M. manginii and P. decipiens collected from 20-30 m depths were move sensitive to W-B radiation compared with those collected from shallower depths, The present study confirmed that an acclimation to the surrounding light regime could be an important factor to determine the UV-sensitivity of a species or individuals and that PAM measurements are rapid and non-destructive methods to evaluate UV influences. From field studies on M. manginii and P. decipiens it was observed that both plants exhibited changes in the effective quantum yield, with the minimum values nt noon followed by n recovery in the evening. Photoinhibition occurred in these species could therefore be accounted for by so- called dynamic photoinhibition. It seems likely that this protective mechanism may contribute to survival of the species in shallow water where they may encounter intense solar radiation. The presence or absence of the W- B component under solar radiation differently affected the photosynthetic recovery process, and the rate of recovery was much stoney in UV- present than in W- absent conditions. Functional role of W- B appears to delay the recovery of photosynthesis in the studied macroalgae. Differential sensitivity to UV-B recognised between M. manginii and P. decipiens seemed to correspond well with the amount of UV-absorbing substances (UVAS) contained in the respective species. Higher tolerance to solar radiation by the latter species may be due to the higher amount of UVAS. There were variations of UVAS concentrations in algal thalli depending on the season and depth of collection. |
| |
| Ű¿öµå |
| UV-B;Antarctica;PAM;Photoinhibition;UVAS; |
| |
|
|
 |
|
ȯ°æ»ý¹° / v.20, no.3, 2002³â, pp.205-215
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921492709)
¾ð¾î : Çѱ¹¾î |
|
| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
|
|
|
|
|
|