Abstract：
Increasing frequency and intensity of cyanobacterial blooms in water sources is a growing global issue. Algicides are usually implemented in summer or autumn when blooms break out, however, the blooms will form again when algicide\'s concentration declines to a certain extent. Preventing the recovery and growth of cyanobacteria in early spring may be conducive to abatement of the blooms in summer or autumn. In this study solid sodium percarbonate (SPC) was used as an algicide to suppress recovery and growth of Pseudanabaena sp., a common odour-producing cyanobacterium, in early spring (12 °C). Results showed that 3.0 and 6.0 mg/L SPC were able to kill most of the algal cells after 12 h treatment at 12 °C, and the residual cells gradually died during the re-cultivation period at 25 °C. As a control, although SPC also caused most of algal cells to lyse at 25 °C, regrowth of cells was found during the period of re-cultivation at 25 °C. Transcriptomic analysis revealed that the dysregulated genes were strongly associated with translation and photosynthesis after SPC treatment. All differentially expressed unigenes related to translation and photosynthesis were down-regulated after SPC oxidation at 12 °C, whereas key genes associated with translation and photosynthesis were upregulated after SPC treatment at 25 °C.
摘要：
水源中蓝藻水华的频率和强度不断增加是一个日益严重的全球问题。灭藻剂通常在夏天或秋天开花时实施，然而,当杀藻剂的浓度下降到一定程度时，水华将再次形成。防止早春蓝藻的恢复和生长可能有助于夏季或秋季的水华减少。在这项研究中，固体过碳酸钠（SPC）用作杀藻剂，以抑制假单胞菌的恢复和生长。,一种常见的产生气味的蓝细菌，早春（12°C）。结果表明，3.0和6.0mg/LSPC在12℃处理12h后能够杀死大部分藻类细胞，并且残留的细胞在25°C的再培养期间逐渐死亡。作为一种控制，尽管SPC也导致大多数藻类细胞在25°C时裂解，在25°C的再培养期间发现细胞再生长。转录组分析显示，SPC处理后，失调的基因与翻译和光合作用密切相关。SPC在12°C氧化后，所有与翻译和光合作用相关的差异表达的单基因均下调，而与翻译和光合作用相关的关键基因在25°C的SPC处理后上调。
