Lead and copper effects on lipid metabolism in cultured lichen photobionts with different phosphorus status

Phytochemistry
I A Guschina, J L Harwood

Abstract

We evaluated the ability of heavy metals (copper, lead) to alter lipid metabolism in four algal lichen photobionts following short term exposure. Metal concentrations (10 microM) were equivalent to environmentally relevant levels that have been reported to have effects on intact algae. The algae were grown under normal or deficient phosphate conditions to assess any interactions with the heavy metal stress. Given the frequent sensitivity of lichens to copper and lead, there were surprisingly small changes on lipid metabolism, as assessed by radiolabelling from [1-14C]acetate. The main effects, which were seen in a number of cases, were an overall inhibition of total lipid labelling and a relative increase in the labelling of triacylglycerols in the non-polar fraction. Both of these changes can be viewed as reflecting general toxicity of heavy metals. The Coccomyxa photobiont species were more sensitive than Trebouxia species, which fits with the general distribution of the latter in lichens inhabiting harsh environments.

Citations

Nov 4, 2006·Applied Microbiology and Biotechnology·Ilona Oksanen
Apr 6, 2007·BMC Evolutionary Biology·Christoph KneipUwe-G Maier
Sep 24, 2014·BioMed Research International·Vidyadharani Gopalakrishnan, Dhandapani Ramamurthy
Feb 24, 2006·Progress in Lipid Research·Irina A Guschina, John L Harwood
Apr 27, 2018·Ecological Applications : a Publication of the Ecological Society of America·Christoph MensensMarleen De Troch
Jun 17, 2020·Environmental Pollution·Lays de Oliveira Gonçalves AlhoMariada Graça Gama Melão

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