Biodegradation of microcystin analogues by Stenotrophomonas maltophilia isolated from Beira Lake Sri Lanka

被引：11
|
作者：
Idroos, E. Sumaiya [1 ,2 ]
De Silva, B. G. D. N. K. [2 ]
Manage, Pathmalal M. [1 ,2 ]
机构：
[1] Univ Sri Jayewardenepura, Fac Sci Appl, Dept Zool, Ctr Water Qual & Algae Res, Nugegoda, Sri Lanka
[2] Univ Sri Jayewardenepura, Fac Sci Appl, Dept Zool, Nugegoda, Sri Lanka
来源：
JOURNAL OF THE NATIONAL SCIENCE FOUNDATION OF SRI LANKA | 2017年 / 45卷 / 02期
关键词：
16S rRNA; microcystin; nitrates; optimisation; phosphates; S; maltophilia; LR; DEGRADATION; BACTERIA; REMOVAL; TOXINS;
D O I：
10.4038/jnsfsr.v45i2.8175
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Bacterial strain 4B4 capable of degrading microcystin-LR (MC-LR) was isolated from the Beira Lake (N 6 degrees 55' 46", E 79 degrees 51' 15") in Sri Lanka. Based on phylogenetic analysis of the 16S rRNA gene sequence, the isolate 4B4 was identified as Stenotrophomonas maltophilia. The bacterium showed 100 % removal of MC-LR in 10 and 8 days of incubation at 28 degrees C and 32 degrees C, respectively. Optimisation studies confirmed that the addition of nitrates (0.4 ppm) and phosphates (0.02 ppm) to the medium can increase the microcystin removal rate of the bacterial strain. Further evaluation of S. maltophilia revealed that it is capable of degrading other microcystin analogues; microcystin-RR, -LW, -LF and nodularin (NOD) as well.
引用
收藏
页码：91 / 99
页数：9
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