The severe toxicity of CuO nanoparticles to the photosynthesis of the prokaryotic algae Arthrospira sp

Che, Xingkai; Ding, Ruirui; Zhang, Qiang; Li, Yujie; Sun, Qi; Li, Yuting; Zhang, Zishan; Wang, Wei; Gao, Huiyuan

doi:10.1007/s11356-021-14341-3

Cited by 12 publications

(2 citation statements)

References 41 publications

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“…More generally, zinc is indispensable for electron transport in photosynthesis and by various enzyme systems as an essential element for metabolic and physiological processes. Numerous studies suggested that inhibition of photosynthesis by metal ions had been observed in algae [35,36]. As the concentration of Zn 2+ exceeded 1 µmol/L, the growth of Scenedesmus subspicatus and Chlamydomonas reinhardtii was inhibited [37].…”

Section: Analysis Of Fluorescence Characteristicsmentioning

confidence: 99%

Response of Chlorophyll Fluorescence Characteristics and Dissolved Organic Matter for Marine Diatom Skeletonema dohrnii under Stress from Penicillin and Zn2+

Liu

Sun

2021

Plants

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Skeletonema dohrnii is a good model diatom for studying environmental stress and has promising applications and prospects in various fields. Antibiotics and heavy metals are commonly exceeded in the nearshore marine habitats. In this work, we investigated the effects of an antibiotic (penicillin, 2 µg/L) and a heavy metal ion (Zn2+, 10 µmol/L) stress on marine diatom S. dohrnii, mainly using excitation-emission matrices (EEMs) fluorescence methods and OJIP test. Results indicated that algal cells grown with the antibiotic showed higher biomass, specific growth rate, doubling time, chlorophyll a, and chlorophyll fluorescence variables. Moreover, excess zinc had negative effects on S. dohrnii. We found that zinc not only inhibited the relative photosynthetic electron transfer efficiency but also reduced the Chl a content, which ultimately affected algal growth and organic matter production. In addition, the combined effect of penicillin and Zn2+ further affected the physiological state of S. dohrnii. The dissolved organic matter (DOM) characteristics of the four cultures were also different, including fluorescence indices (fluorescence index, biological index, β/α, and humification index) and fluorescence peaks (peaks A, C, M and T). In brief, characterization of chlorophyll fluorescence characteristics and DOM-related variables are important for understanding the effects of environmental stress on microalgae.

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Section: Analysis Of Fluorescence Characteristicsmentioning

confidence: 99%

Response of Chlorophyll Fluorescence Characteristics and Dissolved Organic Matter for Marine Diatom Skeletonema dohrnii under Stress from Penicillin and Zn2+

Liu

Sun

2021

Plants

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“…), affecting the photosynthesis and increasing the negative effects of copper oxide (CuO) NPs. 26 Nevertheless, Tang et al discovered that DOM sorbed on the interface of ZnO NPs could limit ROS production and lipid peroxidation, thus reducing the toxicity of NPs. 27 As a typical representative of DOM, humic acid (HA) not only prevented the adhesion of TiO 2 NPs and alleviated the overstimulation of stress response pathways, 28 but also moderated the physiological toxicity of ZnO NPs to Daphnia magna by affecting the aggregation, sedimentation in the aquatic environment.…”

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confidence: 99%