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Spermidine Protects Chlorella sp. from Oxidative Damage Caused by SO2 in Flue Gas from Coal-Fired Power Plants
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2020-09-17 , DOI: 10.1021/acssuschemeng.0c04527
Zhenyi Wang 1 , Jun Cheng 1 , Xiangdong Zhang 1 , Weijuan Yang 1 , Ji-Yeon Park 2 , Hyung-Taek Kim 3 , Li-Hua Xu 3
Affiliation  

To resist the negative effects on Chlorella sp. growth caused by SO2 impurities and 15% CO2 in flue gas from coal-fired power plants, exogenous spermidine, which possesses two amino-terminal domains, was used to enhance antioxidant reactions, improve photosynthesis, protect the cell structure, and repair the extracellular environment. The protective effect on Chlorella sp. growth exhibited by spermidine became more obvious when the cells experienced more serious damage due to higher SO2 concentrations. The superoxide dismutase activity increased from 2.58 to 18.41 U/mg, which effectively alleviated cell damage from reactive oxygen species and toxicity. Spermidine inhibited HSO3/SO32– penetration through cell walls, as well as protected the photosynthetic PSII structure and thylakoid membrane. Accordingly, chlorophyll synthesis recovered from 0.5 to 8.5 mg/L and the maximum photochemical efficiency improved from 0.41 to 0.7. As a result, the Chlorella sp. biomass yield recovered from 0.12 to 1.52 g/L in the presence of exogenous spermidine, while the lipid content of the biomass recovered from 5.28 to 19.12%, which showed the significance of spermidine in protecting microalgal cells in the presence of 15% CO2 flue gas with SO2 impurities.

中文翻译:

亚精胺保护小球藻。燃煤电厂烟气中SO 2引起的氧化损伤

抵抗小球藻的负面影响。燃煤电厂烟道气中SO 2杂质和15%CO 2引起的生长,具有两个氨基末端结构域的外源亚精胺可用于增强抗氧化剂反应,改善光合作用,保护细胞结构并修复细胞外环境。对小球藻的保护作用。当细胞由于较高的SO 2浓度遭受更严重的破坏时,亚精胺所表现出的生长变得更加明显。超氧化物歧化酶活性从2.58 U / mg增加到18.41 U / mg,有效减轻了活性氧和毒性对细胞的伤害。亚精胺抑制HSO 3 / SO 3 2 –穿透细胞壁,并保护光合PSII结构和类囊体膜。因此,叶绿素的合成从0.5升至8.5 mg / L,最大光化学效率从0.41升至0.7。结果,小球藻属。在存在外源亚精胺的情况下,生物量的收率从0.12 g / L恢复至1.52 g / L,而生物质中的脂质含量从5.28恢复至19.12%,这表明亚精胺在15%CO 2烟道存在下对微藻细胞的保护具有重要意义。含SO 2杂质的气体。
更新日期:2020-10-12
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