Growth and metabolismEffect of irradiance on fatty acid, carotenoid, total protein composition and growth of Microcystis aeruginosa
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2021, Water ResearchCitation Excerpt :M. aeruginosa aggregates present on water surfaces are often exposed to intense sunlight (∼2 400 µmol m−2 s−1) (de-Bashan et al., 2008). Many previous studies have also demonstrated that high light intensity can inhibit the growth of M. aeruginosa (Walsh et al., 1997; Zilliges et al., 2011; Zheng et al., 2020). Axenic PCC7806 cells incubated at a light intensity of 80 µmol m−2 s−1 (hereinafter referred to as HL) in BG11 media could not grow after 5 days of incubation and this lack of growth continued until the end of our monitoring period (18 days).
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2017, LimnologicaCitation Excerpt :M. aeruginosa (FACHB-1214) isolated from Lake Taihu was obtained from the Institute of Hydrobiology, Chinese Academy of Sciences. Cells were cultured in BG11 medium at 25 °C under fluorescent light at an intensity of 39 μmol m−2 s−1 with a light:dark period of 12 h:12 h (Walsh et al., 1997; Xu et al., 2013). Before inoculation, M. aeruginosa was centrifuged and washed with sterile deionized water.
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2016, Biomass and BioenergyEffects of light intensity and carbon dioxide on lipids and fatty acids produced by Synechocystis sp. PCC6803 during continuous flow
2015, Algal ResearchCitation Excerpt :Environmental growth conditions determine the fatty acid profile of lipid in microalgae and cyanobacteria [8,15–20]. Quintana et al. [9] reported that growth conditions affected the fatty acid composition of different cyanobacteria species, Liu et al. [21] noted that the degree of unsaturation in fatty acids increased at lower temperatures, Walsh et al. [22] found that the amount of polyunsaturated fatty acids (PUFAs) decreased in favor of monounsaturated fatty acids at high light intensities, and Gombos et al. [23] found that temperature had a strong impact on the degree of unsaturation of fatty acid groups. Synechocystis sp.
Influence of coexisting spiramycin contaminant on the harm of Microcystis aeruginosa at different nitrogen levels
2015, Journal of Hazardous MaterialsCitation Excerpt :At nitrogen levels of 5–100 mg L−1, the stimulated synthesis of chlorophyll-a by 0.1 μg L−1 of spiramycin appeared to be an adaptive response that reflected a cellular requirement for protection against damage by producing excessive energy [35]. This result was consistent with a previous study in which an elevated chlorophyll-a content was detected in M. aeruginosa under environmental stress caused by high irradiance [36]. The toxicity of spiramycin increased as the test concentration increased, and the effects of spiramycin on the chlorophyll-a content changed from stimulation to inhibition at a test concentration of 0.4 μg L−1.