Effect of urea on the growth of<i> Skeletonema costatum </i>and <i>Karenia mikimotoi</i>

Zhilin, 李志林 Li; Yanlei, 周艳蕾 Zhou; Xuejing, 王雪景 Wang; Xiaoyong, 石晓勇 Shi; Chuansong, 张传松 Zhang

doi:10.5846/stxb201601130085

Cited by 2 publications

(1 citation statement)

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“…This study aimed to investigate the toxic effects and mechanism of different copper NPs on marine algae Nitzschia closterium, a commonly used marine bait in aquaculture (Sun et al 2016), and Skeletonema costatum, a red tide species commonly found near the offshore area of China (Li et al 2017). Cu 2+ concentrations in the culture media were analyzed to assess the impact of NPs on microalgae.…”

Section: Introductionmentioning

confidence: 99%

Effects of copper ions and copper nanomaterials on the output of amino acids from marine algae

Huang

Zhou

Zhao

et al. 2021

Preprint

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In this study, the effects of different copper’s forms, metal salt (Cu2+), nano-metal (nano-Cu) and nano-metal oxide (nano-CuO), were tested on two marine algae named Skeletonema costatum and Nitzschia closterium. During a 96-hour exposure to nanoparticles (NPs) and salt, cell number, Cu2+ concentration in the culture medium, morphology and intracellular amino acids was measured to assess the toxicity of those copper materials and the toxicity mechanism of NPs. It was found that the toxicity of Cu2+, nano-Cu and nano-CuO on marine phytoplankton decreased in order. The EC50 values of Cu2+ and nano-Cu for S. costatum and N. closterium ranged from 0.356 to 0.991 mg/L and 0.663 to 2.455 mg/L, respectively. Nano-Cu inhibited the growth of marine phytoplankton mainly by releasing Cu2+, however, nano-CuO mainly produced toxic effects on microalgae through the effect of NPs. The secretion of extracellular polymeric substances by microalgae could be another possible reason for nano-Cu and nano-CuO to impose implications for microalgae. S. costatum was more sensitive to copper than N. closterium. Cu2+, nano-Cu and nano-CuO all reduced the total output of algae-derived amino acids by affecting the growth of phytoplankton and per-cell amino acids. This manuscript is of important implications to fill the data gaps for nano-Cu and nano-CuO risk assessment on marine algae.

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Section: Introductionmentioning

confidence: 99%