Synechococcus and Other Bloom‐Forming Cyanobacteria Exhibit Unique Redox Signatures
Synechococcus and Other Bloom‐Forming Cyanobacteria Exhibit Unique Redox Signatures
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聚球藻和其他形成水华的蓝细菌表现出独特的氧化还原特征
DOI：
10.1002/celc.202001274
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发表时间：
2021
期刊：
影响因子：
4
通讯作者：
Freguia Stefano
中科院分区：
文献类型：
--
作者：
Tokunou Yoshihide;Vieira Lemos Rita;Tsujimura Seiya;Okamoto Akihiro;Ledezma Pablo;Freguia Stefano
蓝藻形成密集的水华，损害水质。虽然水华对水质的影响在很大程度上取决于蓝藻的种类，这是具有挑战性的区分蓝藻种类与传统的传感器，由于其相似的物理化学性质。在这里，我们对三种主要的水华蓝藻进行了循环伏安法，铜绿微囊藻和圆环鱼腥藻，没有添加氧化还原活性化合物，也没有对工作电极进行化学修饰。这些蓝细菌表现出氧化还原峰，具有彼此不同的电位，在+0.60 - +0.75 V vs SHE的范围内。 因为这些氧化还原电位几乎不与其他环境电活性细菌的氧化还原电位重叠，所以这些氧化还原峰可用作蓝藻水华开始的指示剂。鉴于光响应电流与集球藻属的细胞密度相关，电化学测量将是一种有前途的技术，用于新型蓝藻定量传感器，具有识别蓝藻物种的内置能力。
Cyanobacteria form dense blooms that impair water quality. Although the impact of blooms on water quality largely differs depending on the species of cyanobacteria, it is challenging to distinguish cyanobacterial species with conventional sensors due to their similar physicochemical properties. Here, we conducted cyclic voltammetry to three major bloom‐forming cyanobacteria,Synechococcussp.,Microcystis aeruginosa, andAnabaena circinaliswithout addition of redox active compounds nor chemical modifications of the working electrode. These cyanobacteria exhibited redox peaks with distinct potentials from each other, in the range of +0.60 – +0.75 V vs SHE. Because these redox potentials hardly overlap with those of other environmental electroactive bacteria, those redox peaks may be used as indicators of the onset of a cyanobacterial bloom. Given that the photo‐responsive current correlated with the cell density ofSynechococcussp., electrochemical measurement would be a promising technique for a novel cyanobacterial quantification sensor, with in‐built ability to identify cyanobacterial species.