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Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.27, no.2, 2009³â, pp.198-204
Åä¾ç¿¡¼­ ºÐ¸®ÇÑ Poly(butylene succinate-co-butylene adipate) ºÐÇØ±ÕÀÇ ºÐÇØÈ°¼º ÁõÁø
( Improvement of Degrading Activity of Poly(butylene succinateco-butylene adipate)-Degrading Strains Isolated from Soils )
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¿ì¸®³ª¶ó ¼­¿ï½Ã¿Í °æ±âµµ ÀÏ´ëÀÇ Åä¾çÀ¸·ÎºÎÅÍ poly(butylene succinate-co-butylene adipate: PBSA)¸¦ ºÐÇØÇÏ´Â Á߿¼º¼¼±Õ 3ÁÖ¸¦ ºÐ¸®ÇÏ¿´´Ù. 0.01%ÀÇ PBSA filmÀÌ À¯ÀÏ Åº¼Ò¿øÀ¸·Î ÷°¡µÈ º¯Çü Sturm test¿¡¼­ 40Àϰ£ PBSAÀÇ »ýºÐÇØµµ´Â °¢ ºÐ¸®±ÕÁÖ°¡ 30%, 55% ¹× 43%¸¦ ³ªÅ¸³»¾úÀ¸¸ç, ÀÌ Áß Bacillus licheniformis PBSA-5ÀÇ °æ¿ì´Â PBSA»Ó¸¸ ¾Æ´Ï¶ó PVA¿¡µµ ºÐÇØ Ȱ¼ºÀ» ³ªÅ¸³»¾î »ê¾÷ÀûÀ¸·Î ¸Å¿ì À¯¿ëÇÏ°Ô »ç¿ëµÉ °ÍÀ¸·Î »ç·áµÈ´Ù. ºÐ¸®±ÕÁÖ¿¡ ´ëÇÑ 16S rDNA ¿°±â¼­¿­ºÐ¼® °á°ú·ÎºÎÅÍ °¢°¢ Burkholderia cepacia PBSA-4, Bacillus licheniformis PBSA-5 ¹× Burkholderia sp. PBSA-6·Î µ¿Á¤µÇ¾ú´Ù. ºÐ¸®±ÕÁÖµéÀÇ PBSA ºÐÇØ Ȱ¼ºÀº $27^{circ}C$¿¡¼­ °¡Àå ³ô°Ô ³ªÅ¸³µÀ¸¸ç, $47^{circ}C$ ÀÌ»óÀÇ °í¿Â¿¡¼­´Â ºÐÇØ Ȱ¼ºÀÌ °¨¼ÒÇÏ¿´´Ù. ÃÊ±â ±Õ Á¢Á¾·®ÀÌ $10^{10}cfu;mL^{-1}$ÀÏ ¶§ $10^9cfu;mL^{-1}$º¸´Ù PBSAÀÇ ºÐÇØ Ȱ¼ºÀÌ ¾à 1.2~1.3¹è Áõ°¡ÇÏ¿´´Ù. 0.1 ¹× 0.5%ÀÇ gelatin, yeast extract ¹× ammonium sulfate¸¦ ÷°¡ÇÑ °æ¿ì¿¡ PBSAÀÇ ºÐÇØ Ȱ¼ºÀÌ Áõ°¡ÇÏ¿´´Âµ¥, ƯÈ÷ 0.1% gelatinÀÇ Ã·°¡´Â PBSAÀÇ ºÐÇØ Ȱ¼ºÀ» 33% ÁõÁø½ÃÄ×´Ù. ¶ÇÇÑ °¢ ºÐ¸®±ÕÁÖ¸¦ ´Üµ¶ ¹è¾çÇÒ ¶§º¸´Ù µÎ ±ÕÁÖ¸¦ È¥ÇÕ ¹è¾çÇÑ °æ¿ì´Â PBSAÀÇ ºÐÇØ Ȱ¼ºÀÌ ¾à 1.2¹è~2.1¹è±îÁö ÁõÁøµÇ¾î PBSAÀÇ »ýºÐÇØµµ´Â 54~68%¿¡ µµ´ÞÇÏ¿´´Ù.
From leaf mold and reclamation site soil of the Capital area of Korea, 3 poly(butylene succinate-co-butylene adipate: PBSA)-degrading strains were isolated through the clear zone test. The PBSA-degrading activities of the strains were assessed by means of a modified Sturm test using 0.01% of PBSA film as a sole carbon source. After the modified Sturm tests for 40 days at the respective isolation temperatures, the 3 strains degraded 30%, 55% and 43% of PBSA, respectively. The isolated strains were identified to be Burkholderia cepacia PBSA-4, Bacillus licheniformisPBSA-5 and Burkholderia sp. PBSA-6 through the 16S rDNA gene sequence analysis. Among them, PBSA-5 degraded both PBSA and Poly(vinyl alcohol). The degradation activity of the PBSA degrading strains appeared to be high at moderate temperatures such as $27^{circ}C$ and $37^{circ}C$, and initial inoculum size of $10^{10}cfu;mL^{-1}$ degraded PBSA 1.2~1.3 more times than that $10^9cfu;mL^{-1}$. Addition of 0.1 or 0.5% (w/w) of gelatin, yeast extract and ammonium sulfate raised the PBSA degrading activity, and especially addition of 0.1% (w/w) of gelatin enhanced the PBSA degrading activity by more than 33%. The mixed strains degraded PBSA faster than the single strain.
 
Ű¿öµå
PBSA;soil;16S rRNA seguencing;Burkholderia cepacia PBSA-4;Bacillus licheniformis PBSA-5;Burkholderia sp. PBSA-6;activator;
 
ȯ°æ»ý¹° / v.27, no.2, 2009³â, pp.198-204
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200919061725462)
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