Physiological effects of mercury in the lichens Cladonia arbuscula subsp. mitis (Sandst.) Ruoss and Peltigera rufescens (Weiss) Humb.

Pisani, Tommaso; Munzi, Silvana; Paoli, Luca; Bačkor, Martin; Kováčik, Jozef; Piovár, Juraj

doi:10.1016/j.chemosphere.2010.10.062

Cited by 25 publications

(20 citation statements)

References 48 publications

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“…1(c)). These results indicated that low-level air Hg exposure at 50 ng m −3 potentially damaged the functional photosynthetic apparatus in leaves, and the Hg-induced injury of plant photosynthesis has previously been observed in both the light and dark reactions (Krupa and Baszynski 1995;Lu et al 2000;Pisani et al 2011). Ericksen and Gustin (2004) reported that neither P n nor G s of aspen leaves had significant changes among the treatments of Hg exposure at the gradient of 2.4, 11, and 30 ng m −3 (p>0.05).…”

Section: Effects Of Air Hg Exposures On the Physiology Of Maize Leavessupporting

confidence: 54%

“…Mercury (Hg) is a strong phytotoxic metal, which has wideranging adverse effects on the physiological activities of plants, such as prevention of mineral nutrient uptake (Patra and Sharma 2000); inhibition of photosynthesis (Krupa and Baszynski 1995;Lu et al 2000;Pisani et al 2011), transpiration, and water uptake (Zhang and Tyerman 1999); and induction of lipid peroxidation (Cho and Park 2000;Cargnelitti et al 2006;Moreno-Jiménez et al 2006). Mercuric ions react specifically with sulfhydryl groups in proteins and induce the Fenton reaction, resulting in oxidative stress and membrane lipid peroxidation in plants (Han et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the increase in atmospheric Hg concentration may have adverse effects on the physiology of plant leaves, yet detailed knowledge of this hypothesis remains lacking. Additionally, previous studies on the toxicity of Hg to plant physiology were commonly carried out via hydroponic experiments at high Hg levels, that is, hundreds to thousands times of the environmental background level (Cho and Park 2000;Cargnelitti et al 2006;Lomonte et al 2010;Pisani et al 2011;Zhang and Tyerman 1999). Therefore, it is meaningful to study the effects of air and soil Hg exposures on plant physiology at relatively low levels such as several to dozen times of the environmental background level.…”

Section: Introductionmentioning

confidence: 99%

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Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures

Niu

Zhang

Wang

et al. 2013

Environ Sci Pollut Res

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Thousands of tons of mercury (Hg) are released from anthropogenic and natural sources to the atmosphere in a gaseous elemental form per year, yet little is known regarding the influence of airborne Hg on the physiological activities of plant leaves. In the present study, the effects of low-level air and soil Hg exposures on the gas exchange parameters of maize (Zea mays L.) leaves and their accumulation of Hg, proline, and malondialdehyde (MDA) were examined via field open-top chamber and Hg-enriched soil experiments, respectively. Low-level air Hg exposures (<50 ng m −3 ) had little effects on the gas exchange parameters of maize leaves during most of the daytime (p>0.05). However, both the net photosynthesis rate and carboxylation efficiency of maize leaves exposed to 50 ng m −3 air Hg were significantly lower than those exposed to 2 ng m −3 air Hg in late morning (p<0.05). Additionally, the Hg, proline, and MDA concentrations in maize leaves exposed to 20 and 50 ng m −3 air Hg were significantly higher than those exposed to 2 ng m −3 air Hg (p<0.05). These results indicated that the increase in airborne Hg potentially damaged functional photosynthetic apparatus in plant leaves, inducing free proline accumulation and membrane lipid peroxidation. Due to minor translocation of soil Hg to the leaves, low-level soil Hg exposures (<1,000 ng g −1 ) had no significant influences on the gas exchange parameters, or the Hg, proline, and MDA concentrations in maize leaves (p>0.05). Compared to soil Hg, airborne Hg easily caused physiological stress to plant leaves. The effects of increasing atmospheric Hg concentration on plant physiology should be of concern.

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Section: Effects Of Air Hg Exposures On the Physiology Of Maize Leavessupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures

Niu

Zhang

Wang

et al. 2013

Environ Sci Pollut Res

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“…Following projects aimed at investigating the possible toxic effects of elements of geothermal origin such as boron (Pisani et al, 2009), mercury (Pisani et al, 2011a) and arsenic (Pisani et al, 2011b) on lichens, as well as toxicity of new tracers of traffic pollution (Paoli et al, 2013), the aim of this study was to test if treating the lichen X. parietina with Sb-containing solutions causes Sb bioaccumulation as well as physiological and ultrastructural changes.…”

Section: Introductionmentioning

confidence: 99%

Antimony toxicity in the lichen Xanthoria parietina (L.) Th. Fr.

et al. 2013

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In this paper we tested if treating the lichen Xanthoria parietina with Sb-containing solutions causes Sb bioaccumulation as well as physiological and ultrastructural changes. Total and intracellular antimony content in Sb-treated samples increased progressively with increasing concentration in the treatment solutions. Incubation of X. parietina thalli with Sb at concentrations as low as 0.1mM caused a decrease in sample viability, measured as intensity of respiratory activity, and damage to cell membranes, expressed in terms of membrane lipid peroxidation, as well as ultrastructural changes such as plasmolysis, impairment of the thylakoid system of the alga and cytoplasmic lipid droplets. The photosynthetic system hardly responded, at least under the tested experimental conditions.

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“…15 Four northeastern amphibian species have been shown to be adversely affected by approximately 50-1,000 mg L −1 chloride, depending on the species and life stage, 22 suggesting that small amounts of HVHHF wastewater could render breeding habitats unsuitable. Many lichens, [23][24][25] liverworts, 26 sphagnum mosses, [27][28][29] conifers, 30,31 aquatic plants, 32,33 and bog plants 34 are also sensitive to salt; numerous streams are already salinized from road deicing. 35 Furthermore, lichens [36][37][38][39][40] and stoneworts [41][42][43] can be harmed by heavy metals.…”

Section: Hydraulic Fracturingmentioning

confidence: 99%

Risks to biodiversity from hydraulic fracturing for natural gas in the Marcellus and Utica shales

Kiviat

2013

Annals of the New York Academy of Sciences

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High-volume horizontal hydraulic fracturing (HVHHF) for mining natural gas from the Marcellus and Utica shales is widespread in Pennsylvania and potentially throughout approximately 280,000 km(2) of the Appalachian Basin. Physical and chemical impacts of HVHHF include pollution by toxic synthetic chemicals, salt, and radionuclides, landscape fragmentation by wellpads, pipelines, and roads, alteration of stream and wetland hydrology, and increased truck traffic. Despite concerns about human health, there has been little study of the impacts on habitats and biota. Taxa and guilds potentially sensitive to HVHHF impacts include freshwater organisms (e.g., brook trout, freshwater mussels), fragmentation-sensitive biota (e.g., forest-interior breeding birds, forest orchids), and species with restricted geographic ranges (e.g., Wehrle's salamander, tongue-tied minnow). Impacts are potentially serious due to the rapid development of HVHHF over a large region.

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Physiological effects of mercury in the lichens Cladonia arbuscula subsp. mitis (Sandst.) Ruoss and Peltigera rufescens (Weiss) Humb.

Cited by 25 publications

References 48 publications

Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures

Field controlled experiments on the physiological responses of maize (Zea mays L.) leaves to low-level air and soil mercury exposures

Antimony toxicity in the lichen Xanthoria parietina (L.) Th. Fr.

Risks to biodiversity from hydraulic fracturing for natural gas in the Marcellus and Utica shales

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