Release into the environment of metals by two vascular salt marsh plants

Weis, Peddrick; Windham, Lisamarie; Burke, David; Weis, Judith S.

doi:10.1016/s0141-1136(02)00131-9

Cited by 49 publications

(36 citation statements)

References 7 publications

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“…Spartina alterniflora excludes metals through salt glands (Burke et al 2000, Weis et al 2002, but when stomata are closed, the reduced xylem pressure may inhibit the translocation and exclusion of ions from salt glands and thus increase metal concentrations in S. alterniflora tissues. It is also possible that there is increased metal translocation to leaves during stress.…”

Section: Foliar Metal Concentrationmentioning

confidence: 99%

“…It is also possible that there is increased metal translocation to leaves during stress. It has been documented that S. alterniflora leaves increase in metal concentration during senescence, which may also be a mechanism to reduce overall plant metal load as leaves are dropped (P. Weis et al 2002, J. Weis et al 2003. There is also the possibility that plants grow more slowly when stressed, yet accumulate metals at a similar rate to healthy plants, which could lead to an increased concentration (per unit weight) of metals in stressed plants.…”

Section: Foliar Metal Concentrationmentioning

confidence: 99%

See 1 more Smart Citation

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 Concentrationmentioning

confidence: 99%

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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show abstract

“…In set II experiments micro-organisms were present, whereas in set I experiments 8 micro-organisms presence was markedly reduced (results not shown). Therefore, the elutriates 9 with measurable PAHs levels had a much lower microbial population than the other 10 conditions, but even in these cases PAH concentrations were much lower than the dosed could also be adsorbed on the root surface or absorbed into root tissues (Lin et al, 2007) ). 17 However, in the current study it is not possible to determine the exact causes contributing to 18 the removal of PAHs from solution.…”

mentioning

confidence: 99%

“…4), which 9 indicated that PAHs by themselves did not control Cu solubility. Thus, the observed effects 10 were the result of unknown interactions among PAHs, plants and probably Cu (as the PAHs 11 effects depended on the levels of Cu in the medium).…”

mentioning

confidence: 99%

Can PAHs influence Cu accumulation by salt marsh plants?

Almeida

Mucha

Delgado

et al. 2008

Marine Environmental Research

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“…Macrophytes play important roles in the biogeochemistry of salt marsh ecosystems through their active and passive circulation of elements (Weis & Weis, 2004;Weis, Windham, Burke, & Weis, 2002).…”

mentioning

confidence: 99%