Cadmium toxicity to two marine phytoplankton under different nutrient conditions

Aquatic Toxicology
Ai-Jun Miao, Wen-Xiong Wang

Abstract

Cd accumulation and toxicity in two marine phytoplankton (diatom Thalassiosira weissflogii and dinoflagellate Prorocentrum minimum) under different nutrient conditions (nutrient-enriched, N- and P-starved conditions) were examined in this study. Strong interactions between the nutrients and Cd uptake by the two algal species were found. Cd accumulation as well as N and P starvation themselves inhibited the assimilation of N, P, and Si by the phytoplankton. Conversely, N starvation strongly inhibited Cd accumulation but no influence was observed under P starvation. However, the Cd accumulation difference between nutrient-enriched and N-starved cells was smaller when [Cd(2+)] was increased in the medium, indicating that net Cd accumulation was less dependent on the N-containing ligands at high-Cd levels. As for the subcellular distribution of the accumulated Cd, most was distributed in the insoluble fraction of T. weissflogii while it was evenly distributed in the soluble and insoluble fractions of P. minimum at low-Cd levels. A small percentage of cellular Cd (<15%) was adsorbed on the cell surface for both algae at the lowest [Cd(2+)], which increased when the [Cd(2+)] increased. Cd toxicity in phytoplankton was quantified as d...Continue Reading

Citations

Apr 27, 2011·Journal of Environmental Sciences (China)·Qingxia KongXueyou Shen
Feb 6, 2010·Journal of Hazardous Materials·Qingxia KongXueyou Shen
Sep 15, 2009·Aquatic Toxicology·Meng-Jiao Wang, Wen-Xiong Wang
Nov 3, 2011·Environmental Toxicology and Chemistry·Tasha L StoiberDavid E Armstrong
Jun 30, 2009·Environmental Pollution·Ai-Jun MiaoPeter H Santschi
Apr 6, 2012·Plant Signaling & Behavior·Sanaa ShanabEmad Shalaby
Dec 22, 2017·Chemosphere·Goni-Urriza MarisolPringault Olivier
Jun 2, 2020·Chemosphere·Olivier PringaultAsma Sakka Hlaili
Jul 8, 2014·Journal of Agricultural and Food Chemistry·Shun-Xing LiXu-Guang Huang
Mar 8, 2008·Environmental Science & Technology·Mengjiao Wang, Wen-Xiong Wang

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