Copper localization, elemental content, and thallus colour in the copper hyperaccumulator lichenLecanora sierraefrom California

Autor:	John Spratt, O. W. Purvis, James P. Bennett
Rok vydání:	2011
Předmět:	Canyon geography geography.geographical_feature_category biology Chemistry chemistry.chemical_element Lecanora Electron microprobe biology.organism_classification Copper Thallus Botany Hyperaccumulator Lichen Ecology Evolution Behavior and Systematics Selenium
Zdroj:	The Lichenologist. 43:165-173
ISSN:	1096-1135 0024-2829
DOI:	10.1017/s0024282910000770
Popis:	An unusual dark blue-green lichen,Lecanora sierrae, was discovered over 30 years ago by Czehura near copper mines in the Lights Creek District, Plumas County, Northern California. Using atomic absorption spectroscopy, Czehura found that dark green lichen samples from Warren Canyon contained 4% Cu in ash and suggested that its colour was due to copper accumulation in the cortex. The present study addressed the hypothesis that the green colour in similar material we sampled from Warren Canyon in 2008, is caused by copper localization in the thallus. Optical microscopy and electron microprobe analysis of specimens ofL. sierraeconfirmed that copper localization took place in the cortex. Elemental analyses ofL. sierraeand three other species from the same localities showed high enrichments of copper and selenium, suggesting that copper selenates or selenites might occur in these lichens and be responsible for the unusual colour.
Databáze:	OpenAIRE
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