Use of the aquatic lichen Dermatocarpon luridum as bioindicator of copper pollution: Accumulation and cellular distribution tests

Physiological comparison of copper toxicity in the lichens Peltigera rufescens (Weis) Humb. and Cladina arbuscula subsp. mitis (Sandst.) Ruoss

“…Recently, Bačkor et al (2007) found that TBARS production in the lichen photobiont is increased in response to copper excess. Increased production of malondialdehyde (MDA) related to damage of cell membranes in Dermatocarpon luridum subjected to excess of copper has been confirmed by Monnet et al (2005). Content of MDA, the main constituent of TBARS, has been found to increase after 6 h of copper treatment (250 and 500 lM) in lichen D. luridum, and ranged between approximately 130 and 160 lmol/g dw.…”

Cladia aggregata (lichen) from Brazilian northeast: chemical characterization and antimicrobial activity

“…Lichen substances have been used for centuries (Llano, 1951). Their metabolites possess several biological properties such as antitumor (Santos et al, 2006), antiinflamatory (Vijayakumar et al, 2000;Maia et al, 2002), antimicrobial (Piovano et al, 2002;Falcão et al, 2002;Ingólfsdóttir, 2002), antiparasitary (Carvalho et al, 2005), besides their action as UV sun blockers (Rancan et al, 2002) and efficiency as bioaccumulators and bioindicators of air quality, due to their ability of retaining contaminants, mainly heavy metals (Krishna et al, 2003;Monnet et al, 2005). The presence of phenolic derivatives in lichen is determinant for its antimicrobial activity.…”

Biosorption of Co2+ ions by lichen Hypogymnia physodes from aqueous solutions

“…Lower intracellular Co content was observed with Na 2 EDTA. Such small differences could be explained by taking into consideration that 20 mM Na 2 EDTA is capable of extracting metals that are strongly bound to extracellular sites, although it causes releases of mobile elements from the cell (Vázquez et al 1999;Monnet et al 2005). Our results suggested that cobalt is preferentially accumulated in extracellular sites of lichen H. physodes.…”

“…There is a tendency to use nonvascular plants (lichen and mosses biomass) as bioindicators of water contamination with metals and radionuclides. Some newer data were published by Fugueira & Ribeiro (2005) and Monnet et al (2005). However in the case when lichen will be used as a probe in extremely acidic mine waters, false low concentrations of cobalt can be registered.…”

“…However, the role of lichens in micronutrient and trace metal cycling in many settings remains largely non-quantified (Haas et al 1998). Lichens' nutrition depends on an input of mineral elements by interception of either soluble or particulate material through extracellular exchange at the thalli level, followed by intracellular uptake of elements (Sarret et al 1998;Monnet et al 2005).…”