<br>肠膜明串珠菌DH消除铜绿微囊藻及其机制,Science of the Total Environment

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肠膜明串珠菌DH消除铜绿微囊藻及其机制
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-11-07 , DOI: 10.1016/j.scitotenv.2023.168290
Yi Li ₁ , Mengyuan Qin ₁ , Shuo Han ₁ , Yuqi Wang ₁ , Chao Gao ₁ , Wenfang Niu ₁ , Xiaohua Xia ₂

Affiliation

广泛存在于各种水体中，可产生微囊藻毒素（MC），威胁水生动物和人类的健康。消除过量有利于保护生态系统和公众健康。在这方面，溶藻细菌作为根除藻类的有效措施已被广泛研究。然而，溶藻细菌产生的活性物质是有限的。在本研究中，我们揭示了DH产生的苯乳酸（PLA）对去除具有高效的功效，并探讨了菌株DH对的消除机制。结果发现，DH菌株的无细胞上清液对 .暴露于菌株 DH 上清液后，藻细胞中诱导出丰富的活性氧，以及超氧化物歧化酶和过氧化氢酶反应。此外，藻类细胞膜和光合作用的完整性受到严重破坏。有趣的是，添加的外源丁子香酚显着抑制了菌株DH产生的活性物质的合成，这在代谢组学分析的基础上进一步确定PLA是有助于根除该菌的活性物质之一。我们的研究结果首次证明PLA（作为一种抗蓝藻化合物）可以用于去除蓝藻，这为控制蓝藻提供了理论基础。

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Elimination of Microcystis aeruginosa through Leuconostoc mesenteroides DH and its underlying mechanism

is ubiquitously found in various water bodies and can produce microcystins (MCs), which threaten the health of aquatic animals and human beings. The elimination of excessive is beneficial for the protection of the ecosystems and public health. In this regard, algae-lysing bacteria have been extensively studied as an effective measure for their eradication. However, the active substances generated by algae-lysing bacteria are limited. For this study, we reveal that the phenyllactic acid (PLA) produced by DH exhibits high efficacy for the removal of , and explore the elimination mechanism of strain DH on . It was found that a cell-free supernatant of strain DH possessed high removal activities against . Abundant reactive oxygen species were induced in algal cells following exposure to strain DH supernatant, as well as superoxide dismutase and catalase responses. Furthermore, the integrity of algal cell membranes and photosynthesis was seriously damaged. Interestingly, added exogenous eugenol significantly inhibited the synthesis of active substance produced by strain DH, which further identified that PLA is one of the active substances that contribute to the eradication of on the basis of metabolomics analysis. Our finding demonstrated, for the first time, that PLA (as an anti-cyanobacterial compound) can be used for the removal of , which provides a theoretical basis for the control of .

更新日期：2023-11-07

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