A comparison of physiological indicators of sublethal cadmium stress in wetland plants

Mendelssohn, I. A.; McKee, Karen L.; Tingting, Kong

doi:10.1016/s0098-8472(01)00106-x

Cited by 83 publications

(33 citation statements)

References 18 publications

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“…Because our sites were located in pristine areas (Sapelo Island, a National Estuarine Research Reserve; and Cumberland Island, a National Sea -shore), contamination was unlikely to be the cause of the observed increase in foliar metals. In fact, very few of the metal concentrations observed here (B, Cd, and Co) were elevated compared to other studies that have reported foliar metals in S. alterniflora, and none exceeded the amounts that would be expected to cause toxicity (Mendelssohn et al 2001, Plank & Kissel 2011.…”

Section: Foliar Metal Concentrationcontrasting

confidence: 76%

“…These have either reported the effects of metal toxicity on Spartina alterniflora in greenhouse studies (Mendelssohn et al 2001, Mateos-Naranjo et al 2008 or have examined metal accumulation in the field at polluted sites (Cambrollé et al 2011, Salla et al 2011. Across these studies, S. alterniflora was highly tolerant of soil metal contamination, able to hyperaccumulate metals, and capable of phytoremediation (Salla et al 2011).…”

Section: Foliar Metal Concentrationmentioning

confidence: 99%

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Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

McFarlin¹,

Alber²

2013

Mar. Ecol. Prog. Ser.

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We evaluated 2 potential indicators of stress, viz. the ratio of dimethylsulfoxide to dimethylsulfoniopropionate (DMSO:DMSP) and foliar metals, in Spartina alterniflora collected from areas affected by 4 different disturbances (sudden marsh dieback, horse grazing, increased snail densities, wrack deposition) across 20 marshes in Georgia, USA. The DMSO:DMSP ratio was a stronger and more consistent indicator of stress than either DMSP or DMSO concentrations alone, with significantly higher ratios occurring in leaves and stems collected from affected compared to healthy areas in all 4 disturbance types. Foliar metal concentrations also differed in affected compared to healthy areas. Of 20 metals evaluated, concentrations of 19 were increased in leaves collected from edge and affected areas. Multidimensional scaling using the entire suite of metals showed separation between plants from affected and healthy areas, but no difference among disturbance types. In contrast, chlorophyll a concentrations were not significantly different between affected and healthy areas, and did not correlate with variation in either of the 2 indicators. These results suggest that the DMSO:DMSP ratio and foliar metal suite are sensitive indicators of sublethal stress in Spartina, capable of identifying stress before there are visible signs such as chlorophyll loss. The fact that both indicators were consistent across a variety of disturbance types suggests that they may be primarily responsive to general oxidative stress and thus, broadly useful tools for evaluating the health of salt marsh habitat in the field. Spartina alterniflora salt marsh near St. Simons Island, GA, with a dieback area along the edge of the tidal creek.

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Section: Foliar Metal Concentrationcontrasting

confidence: 76%

Section: Foliar Metal Concentrationmentioning

confidence: 99%

Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

McFarlin¹,

Alber²

2013

Mar. Ecol. Prog. Ser.

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“…Cadmium: In plants, Cd triggers a sequence of reactions leading to: (i) inhibition (Schützendübel and Polle, 2002) or growth reduction of the aerial part and the root system (Mendelssohn et al, 2001); (ii) induction of phytochelatin production (Cobbett and Goldsbrough, 2002); (iii) interference in chlorophyll biosynthesis and activity of specific enzymes, such as peroxidase, ascorbate peroxidase, catalase, glutathione synthetase, glutathione reductase, dehydroascorbate reductase, superoxide dismutase, guaiacol peroxidase, monodehydroascorbate reductase (Vassilev et al, 2002); (iv) induction of apoptotic bodies and oligonucleosomal DNA fragments (Souza, 2007); (v) induction of oxidative stress (Souza, 2007); (vi) damage to chloroplasts A.-A.F. ALMEIDA et al (Vollenweider et al, 2006); (vii) reduction of transpiration and photosynthetic rates (Sanitá di Toppi and Gabbrielli, 1999); (viii) induction of premature leaf senescence and chlorosis (Souza, 2007); and (ix) stimulation of secondary metabolism, lignification and, finally, cellular death (Schützendübel and Polle, 2002).…”

Section: Effect Of Metals On Nutrition and Metabolism Of Plantsmentioning

confidence: 99%

Tolerance and prospection of phytoremediator woody species of Cd, Pb, Cu and Cr

Almeida

Valle

Mielke

et al. 2007

Braz. J. Plant Physiol.

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High concentrations of Cd, Pb, Cu and Cr can cause harmful effects to the environment. These highly toxic pollutants constitute a risk for aquatic and terrestrial life. They are associated with diverse bioavailable geochemical fractions, like the water-soluble fraction and the exchangeable fraction, and non-available fractions like those associated with the crystalline net of clays and silica minerals. Depending upon their chemical and physical properties we can distinguish different mechanisms of metal toxicity in plants, such as production of reactive oxygen species from auto-oxidation, blocking and/or displacement of essential functional groups or metallic ions of biomolecules, changes in the permeability of cellular membranes, reactions of sulphydryl groups with cations, affinity for reactions with phosphate groups and active groups of ADP or ATP, substitution of essential ions, induction of chromosomal anomalies and decrease of the cellular division rate. However, some plant species have developed tolerance or resistance to these metals naturally. Such evolution of ecotypes is a classic example of local adaptation and microevolution, restricted to species with appropriate genetic variability. Phytoremediator woody species, with (i) high biomass production, (ii) a deep root system, (iii) high growth rate, (iv) high capacity to grow in impoverished soils, and (v) high capacity to allocate metals in the trunk, can be an alternative for the recovery of degraded soils due to excess of metallic elements. Phytoremediation using woody species presents advantageous characteristics as an economic and ecologically viable system, making it an appropriate, practical and successful technology. Key-words: decontamination, heavy metals, hyperaccumulation, phytodegradation, phytostabilization, phytotoxicity Tolerância e prospecção de espécies lenhosas fitorremediadoras de Cd, Pb, Cu e Cr: Altas concentrações de Cd, Pb, Cu e Cr podem provocar efeitos danosos ao ambiente. Esses poluentes altamente tóxicos constituem um risco para a vida aquática e terrestre. Encontram-se associados às diversas frações geoquímicas biodisponíveis, a exemplo da fração solúvel em água e da fração trocável, e as não disponíveis como a fração associada à rede cristalina de argilas e de minerais silicatados. Conforme as suas propriedades químicas e físicas podem-se distinguir mecanismos diferentes de toxicidade de metais em plantas, tais como produção de espécies reativas de oxigênio pela auto-oxidação, bloqueio e, ou, deslocamento de grupos funcionais ou de íons metálicos essenciais de biomoléculas, mudanças na permeabilidade de membranas celulares, reações de grupos sulfidrílicos com cátions, afinidade para reações com grupos fosfatos e grupos ativos de ADP ou ATP, substituição de íons essenciais, indução de anomalias cromossomais e decréscimo da taxa de divisão celular. Várias espécies vegetais desenvolveram, naturalmente, tolerância ou resistência a esses metais. Essa evolução de ecótipos é exemplo clássico de adaptação local e de microevolução,...

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“…It is known that Hg affects antioxidant defense system of cells, interfering with nonenzymatic antioxidants, glutathione and non-protein thiols as well as the enzymatic antioxidants superoxide dismutase, ascorbate peroxidase and glutathione reductase [7][8][9]. Cadmium is a nonessential metal for plants and it causes a decrease in growth rate, impaired chloroplast structure and reduction in pigment content that result in chlorosis and even plant death [10][11][12]. Unlike other transition elements that can produce ROS directly by participating in the conversion of relatively stable oxidants into powerful radicals, Cd is not redox active and cannot catalyze Fenton-type reactions.…”

Section: Introductionmentioning

confidence: 99%

Short term exposure of Lemna minor and Lemna gibba to mercury, cadmium and chromium

2013

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The effects of mercury (Hg), cadmium (Cd) and chromium (Cr) in concentrations ranging from 0.02 to 20 mg L−1 applied for 24 h were assessed in Lemna minor and Lemna gibba by measuring changes in protein concentration, ascorbic acid, phenolics, malondialdehyde (MDA), hydrogen peroxide (H2O2), the activity of guaiacol peroxidase (G-POX) and catalase (CAT). Ascorbic acid, phenolics, catalase and guaiacol peroxidase played a key role in the antioxidative response of L. gibba. Inadequate activity of antioxidant enzymes in the L. minor resulted in MDA and H2O2 accumulation. In both used species, Hg treatment decreased protein content and increased CAT and G-POX activity, but decreased MDA and H2O2 levels. Cadmium and chromium had opposite impacts on two used Lemna species on almost all observed parameters. Enhanced antioxidative responses of L. gibba to lower concentrations of Hg, Cd and Cr indicated greater abiotic stress tolerance than L. minor.

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A comparison of physiological indicators of sublethal cadmium stress in wetland plants

Cited by 83 publications

References 18 publications

Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

Foliar DMSO:DMSP ratio and metal content as indicators of stress in Spartina alterniflora

Tolerance and prospection of phytoremediator woody species of Cd, Pb, Cu and Cr

Short term exposure of Lemna minor and Lemna gibba to mercury, cadmium and chromium

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