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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.36, no.2, 2003³â, pp.108-116
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Anabaena cylindrica ºÐÇØ¼¼±Õ AK-07ÀÇ µ¿Á¤°ú ºÐÇØ °ü·Ã È¿¼ÒȰ¼º Á¶»ç
( Identification of Alga-lytic Bacterium AK-07 and Its Enzyme Activities Associated with Degradability of Cyanobacterium Anabaena cylindrica ) |
| ±èÁ¤µ¿;ÇѸí¼ö; ÇѾç´ëÇб³ »ý¸í°úÇаú;ÇѾç´ëÇб³ »ý¸í°úÇаú;
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| ºÎ¿µ¾çÈ Çö»óÀ» ³ªÅ¸³»´Â ¼®ÃÌÈ£¼ö¿Í ÆÈ´çÈ£ÀÇ Ç¥Ãþ¼ö¿Í Àú´Ï·ÎºÎÅÍ 178°³ÀÇ ±ÕÁÖ¸¦ ºÐ¸®ÇÑ ÈÄ, Anabaena cylindrica lawn »ó¿¡¼ plaque¸¦ Çü¼ºÇÏ´Â 9°³ÀÇ ±ÕÁÖ¸¦ ¼±º°ÇÏ¿´À¸¸ç À̵é Áß¿¡¼ ³²Á¶·ù »ýÀå ¾ïÁ¦ ´É·ÂÀÌ °¡Àå ¿ì¼öÇÑ AK-07¸¦ ¼±¹ßÇÏ¿´´Ù. AK-07ÀÇ Æ¯¼º°ú 16S rDNAÀÇ ¿°±â ¼¿ ºÐ¼®À» ±âÃÊ·Î ÇÏ¿© À¯¿¬°ü°è¸¦ Á¶»çÇÑ °á°ú, ÇüÅÂÀû, »ý¸®Àû »ýÈÇÐÀû Ư¡µéÀº Acinetobacter¼ÓÀÇ Æ¯¼ºµé°ú À¯»çÇÏ¿´À¸¸ç, 165 rDNAÀÇ ¿°±â ¼¿ ºÐ¼®ÇÑ °á°ú´Â Acinetobacter johnsonii¿Í 99.5%ÀÇ À¯»ç¼ºÀ» ³ªÅ¸³»¾î, Acinetobacter johnsonii AK-07·Î ¸í¸íÇÏ¿´´Ù. ³²Á¶·ù ºÐÇØ Ư¼ºÀ» Á¶»çÇϱâ À§Çؼ, AK-07¸¦ A. cylindrica¿Í È¥ÇÕ ¹è¾ç½Ã Á¢Á¾ 2ÀÏ ÈÄ¿¡ ³²Á¶·ùÀÇ ºÐÇØ°¡ °üÂûµÇ¾ú°í, Á¢Á¾ 10ÀÏ ÈÄ¿¡´Â ³²Á¶·ù°¡ ¿ÏÀüÈ÷ »ç¸êÇÏ¿´À¸¸ç, AK-07ÀÇ ¼¼Æ÷ ¼ö´Â $8;{ imes};10^8;cfu;ml^{-1}$±îÁö Áõ°¡ÇÏ¿´´Ù. ±×·¯³ª ¹è¾ç »óµî¾×À» A. cylindrica¿Í È¥ÇÕ ¹è¾ç ÇÏ¿´À» ¶§¿¡´Â ³²Á¶·ùÀÇ ºÐÇØ´Â °üÂû µÇÁö ¾Ê¾Ò´Ù. µû¶ó¼ AK-07´Â ³²Á¶·ù¸¦ Á÷Á¢ Á¢ÃËÇÏ¿© ºÐÇØÇÏ´Â °ÍÀ¸·Î »ç·áµÇ¾î, AK-07¿¡ ¼¼Æ÷¿¡ Á¸ÀçÇÏ´Â È¿¼ÒÀÇ È°¼ºÀ» Á¶»çÇÑ °á°ú Pretense¿Í glycanasesÁß¿¡¼ ${eta}$-XylosidaseÀÇ È°¼ºÀÌ °¡Àå ³ô¾ÒÀ¸¸ç, Alginase, Laminarinase, Lipase, ${eta}$-Galactosidase ¹× ${eta}$-GlucosidaseÀÇ È°¼ºµµ ³ôÀº ¼öÁØÀ¸·Î °üÂûµÇ¾ú´Ù. A. johnsonii AK-07Àº A. cylindricaÀÇ polysaccharides³ª peptidoglycans¸¦ monosaccharidesÀ̳ª ÀúºÐÀÚ À¯±â¹°·Î ºÐÇØÇÏ´Â °ÍÀ¸·Î ¿©°ÜÁø´Ù. |
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| To investigate bacteria with algal Iytic activities against Anabaena cylindrica when water blooming occurs and to study enzyme profiles of alga-Iytic bacteria, various bacterial strains were isolated from surface waters and sediments in eutrophic lakes or reservoirs in Korea. Abacterial strain AK-07 was characterized and identified as Acinetobacter johnsonii based on its16S rDNA base sequence. When AK-07 was co-cultivated with A. cylindrica, bacterial cells propagated to $8;{ imes};10^8$ cfu $ml^{-1}$ and Iyses algal cells. However, culture filtrates of AK-07 did not exhibit algal Iytic activities. That suggesting the enzymes on the surfaces of the bacterium might be effective algal Iytic agents to cause Iyses of cells. Acinetobacter johnsonii AK-07 exhibited high degradation activities against A. cylindrica, and formed alginase, caseinase, lipase, fucodian hydrolase, and laminarinase. Moreover, glycosidases for example ${eta}$-galatosidase, ${eta}$-glucosidase, ${eta}$-glucosaminidase, and ${eta}$-xylosidase, which hydrolyzed ${eta}$-0-glycosidic bonds, were found in cell-free extracts of A. johnsonii AK-07. Other glycosidase such as ${alpha}$-galctosidases, ${alpha}$-N-Ac-galctosidases, ${alpha}$-mannosidases, and ${alpha}$- L-fuco-sidases, which cleavage ${alpha}$-0-glycosidic bondsare not detected. In the results, enzyme systemsof A. johnsonii AK-07 were very complex to do-grade cell walls of cyanobacteria. The polysaccharides or peptidoglycans of A. cylindrica maybe hydrolyzed and metabolized to a range of easily utilizable monosaccharides or other low molecular weight organic substances by strain AK-07 of A. johnsonii. |
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| Ű¿öµå |
| hydrolytic-enzyme;alga-lytic bacterium;Acinetobacter johnsonii;Anabaena cylindrica; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.36, no.2, 2003³â, pp.108-116
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200318317181139)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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