Accumulation of atmospheric mercury in forest foliage

Ericksen, Jody; Gustin, Mae Sexauer; Schorran, David E.; Johnson, Dale W.; Lindbeŕg, Steven E.; Coleman, James S.

doi:10.1016/s1352-2310(03)00008-6

Cited by 349 publications

(286 citation statements)

References 31 publications

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“…When Hg evaporates from the nutritive solution it can be absorbed by the leaf surfaces of control plants nearby (Göthberg et al, 2004) with little transport to roots. Airborne Hg has been reported to be readily taken up by plant leaves (Mosbaek et al, 1988;Ericksen et al, 2003); the long duration of the present experiment might have allowed a certain degree of such accumulation.…”

Section: Discussionmentioning

confidence: 77%

Physiological responses of Eichhornia crassipes [Mart.] Solms to the combined exposure to excess nutrients and Hg

Caldelas

Iglesia-Turiño

Araus

et al. 2009

Braz. J. Plant Physiol.

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. The accumulation of P and S was reduced by the addition of HgCl 2 , and also the P and K concentrations in emerged and submerged parts respectively decreased. In contrast, the addition of HgCl 2 increased Ca and Mg concentrations in submerged parts. Furthermore, the concentration ratios of submerged/ emerged parts for Ca, Mg and P were also reduced by the addition of HgCl 2 . The interaction of HgCl 2 and KNO 3 was synergistic and decreased F v /F m , total chlorophyll content and P and Mn concentrations in emerged parts. In submerged plant parts Ca concentration increased and K content stabilized as a result of the above interaction. However, the total accumulation of Hg per plant was not reduced, thereby confirming the water hyacinth as a promising candidate for the heavy metal phytoremediation of eutrophic waters.

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Section: Discussionmentioning

confidence: 77%

Physiological responses of Eichhornia crassipes [Mart.] Solms to the combined exposure to excess nutrients and Hg

Caldelas

Iglesia-Turiño

Araus

et al. 2009

Braz. J. Plant Physiol.

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“…Louis et al, 2001;Obrist, 2007;Friedli et al, 2009), e.g., vegetation as the missing sink in global Hg mass balance (Gustin et al, 2008). A critical question eager for answer in the global Hg cycling is whether the large amount of Hg stored in vegetation originates from the soil or from the atmosphere (Ericksen et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Field controlled experiments of mercury accumulation in crops from air and soil

Niu

Zhang

Wang

et al. 2011

Environmental Pollution

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“…3(b)). Previous studies have shown that Hg in maize leaves is mainly derived from the atmosphere and that roots act as a barrier for soil Hg translocation to the aboveground plant biomass (Bishop et al 1998;Rea et al 2002;Ericksen et al 2003;Fay and Gustin 2007). In addition, active Hg is not the dominant speciation in soil (Zhu et al 1996).…”

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

confidence: 99%

“…Studies demonstrated that the concentration of Hg in plant leaves is correlated positively with that in the atmosphere (e.g., Ericksen et al 2003;Millhollen et al 2006;Niu et al 2011Niu et al , 2013. 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.…”

Section: Introductionmentioning

confidence: 99%

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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Accumulation of atmospheric mercury in forest foliage

Cited by 349 publications

References 31 publications

Physiological responses of Eichhornia crassipes [Mart.] Solms to the combined exposure to excess nutrients and Hg

Physiological responses of Eichhornia crassipes [Mart.] Solms to the combined exposure to excess nutrients and Hg

Field controlled experiments of mercury accumulation in crops from air and soil

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

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