Oxidative stress of Microcystis aeruginosa induced by algicidal bacterium Stenotrophomonas sp. KT48
文献类型：期刊论文
| 作者 | Lyu, Ping; Li, Huili; Zheng, Xiaoxu ; Zhang, Hao; Wang, Cong; Qin, Yu; Xia, Bing; Wang, Dongsheng; Xu, Shengjun; Zhuang, Xuliang
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| 刊名 | APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
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| 出版日期 | 2022-06 |
| 卷号 | 106期号:11页码:4329-4340 |
| 关键词 | LAKE TAIHU ACTIVE-SUBSTANCE STRAIN CYANOBACTERIA IMPACT ALGAE |
| ISSN号 | 0175-7598 |
| 英文摘要 | Cyanobacterial harmful algal blooms are a worldwide problem with substantial adverse effects on the aquatic environment as well as human health. Among the multiple physicochemical and biotic approaches, algicidal bacterium is one of the most promising and eco-friendly ways to control bloom expansion. In this study, Stenotrophomonas sp. KT48 isolated from the pond where cyanobacterial blooms occurred exhibited a strong inhibitory effect on Microcystis aeruginosa. However, the algicidal performance and mechanisms of Stenotrophomonas sp. remain under-documented. To explore the algicidal performance and physiological response againt M. aeruginosa, further works were implemented here. Our results indicated that the algicidal rate of strain KT48 cultured in 1/8 LB medium supplemented with 0.3% starch or glucose was about 30% higher than that in 1/8 LB medium. Strain KT48 culture, cell-free filtrate, and cells re-suspended were inoculated into the M. aeruginosa culture, and the Chl-a content was determined. Those results indicated that the algicidal activity of cells re-suspended was far higher than that of cell-free filtrate and culture. Thus, strain KT48 exhibited algicidal activity mainly through direct attacking M. aeruginosa rather than excretion of algicides. Furthermore, strain KT48 led to an increase in cellular reactive oxygen species (ROS) and caused lipid peroxidation as supported by the increase in malondialdehyde (MDA) levels. The ROS and MDA levels in algal cells treated with strain KT48 cells re-suspended were about 3.23-fold and 2.80-fold higher than those of untreated algal cells on day 11. And a further inhibition to the antioxidant system is suggested by a sharp decrease in the superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) activities. In addition, we also observed that the morphology of most algal cells changed from integrity to break. This study not only indicated strain KT48 with strong algicidal activity, but also explored the underlying algicidal mechanisms to provide a source of bacterial agent for the biocontrol of cyanobacterial blooms. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47809]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 通讯作者 | Xu, Shengjun |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China 3.Kashgar Univ, Sch Civil Engn, Kashgar 844000, Peoples R China 4.Yangtze River Delta Res Ctr Ecoenvironm Sci, Yiwu 322000, Peoples R China 5.Shenzhen BLY Landscape & Architecture Planning &, Shenzhen 518055, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lyu, Ping,Li, Huili,Zheng, Xiaoxu,et al. Oxidative stress of Microcystis aeruginosa induced by algicidal bacterium Stenotrophomonas sp. KT48[J]. APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,2022,106(11):4329-4340. |
| APA | Lyu, Ping.,Li, Huili.,Zheng, Xiaoxu.,Zhang, Hao.,Wang, Cong.,...&Zhuang, Xuliang.(2022).Oxidative stress of Microcystis aeruginosa induced by algicidal bacterium Stenotrophomonas sp. KT48.APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,106(11),4329-4340. |
| MLA | Lyu, Ping,et al."Oxidative stress of Microcystis aeruginosa induced by algicidal bacterium Stenotrophomonas sp. KT48".APPLIED MICROBIOLOGY AND BIOTECHNOLOGY 106.11(2022):4329-4340. |
入库方式： OAI收割
来源：生态环境研究中心
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