Metal Ions and Plant Nutrition

Mehra, Aradhana; Farago, M. E.

doi:10.1002/9783527615919.ch2

Cited by 21 publications

(15 citation statements)

References 141 publications

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“…Several macronutrients, N, P, K, S, Ca, and Mg, are needed for normal plant growth and development. In addition, plants need a variety of metal ions for the optimum integration of growth and metabolic activity (Mehra and Farago, 1994) Alteration of these macro and micronutrients changes the physicochemical conditions in the rhizosphere and a!ects plant metabolism. This raises therefore the possibility that the growth medium nutrients, frequently in#uenced by agronomic practices, could in#uence heavy metal accumulation by plants.…”

Section: Introductionmentioning

confidence: 99%

Nutrition Influence on Copper Accumulation by Brassica pekinensis Rupr.

Xiong

2002

Ecotoxicology and Environmental Safety

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Section: Introductionmentioning

confidence: 99%

Nutrition Influence on Copper Accumulation by Brassica pekinensis Rupr.

Xiong

2002

Ecotoxicology and Environmental Safety

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“…Whereas Pb is not an essential element to plants and only a small proportion in soils is considered bioavailable, Zn is an essential micronutrient, being part of some enzymes (Mehra & Farago 1994). Very high levels of these metals have been reported within lichens (e.g.…”

Section: Lichens Of Lead/zinc -Rich Rocks and Associated Soilsmentioning

confidence: 99%

“…Generally, the deposits containing these minerals are Fe sulphide deposits in which Cu only occurs in subordinate amounts. Whereas Cu is an essential element playing a significant role in several enzyme systems (Hay 1994;Mehra & Farago 1994), it is toxic to both plants and fungi in high concentration.…”

Section: Ironmentioning

confidence: 99%

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A Review of Lichens in Metal-Enriched Environments

Purvis

Halls

1996

LIC

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The importance of mineralogy in determining lichen assemblages occurring on metalliferous rocks and derived soils is discussed with reference to environments enriched in metals from mine and smelter wastes and other sites involving human activities. A study of lichens growing on Cu and Fe sulphide-rich rocks in Scandinavia is presented. This data suggests that the composition of the lichen communities is governed by mineralogy, which influences the mobility and availability of Cu 2+ and Fe 2+ in the environment, rather than the total concentrations of either metals within the substratum. A new lichen community, the Lecideion inopis Purvis, is described characterized by the faithful species Lecidea inops, Psilolechia leprosa and several Cu-rich ecotypes. This community occurs in alkaline environments where Cu is fixed predominantly as a secondary hydroxide or carbonate. Conversely, low pH, Fe sulphide-rich environments, where Cu may also be present, are characterized by the Acarosporion sinopicae, which includes several species with a rusty colouration. Contrasting assemblages rich in terricolous ephemeral species, especially Vezdaea spp. occurring in Pb/Zn-rich environments, and the comparatively species-poor assemblages on Cr and Ni-rich ultrabasic rocks, are also reviewed. Although mine spoil heaps and other mineralized environments are perceived in human terms as toxic, they may support a diversity of lichens, including rare taxa restricted to these sites. The systematic description of these lichen communities in relation to rock mineralogy and chemical processes are necessary if physiological tolerance and speciation are to be understood.

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“…Accumulation of Se in plants can vary depending on plant species, soil Se content, and availability of soil Se species (Mehra and Farago, 1994). The processes leading to Se availability and plant uptake from soils are numerous, interrelated and variable (Skinner, 2001), and need to be considered when analyzing the distribution of plant Se in the Fort Carson environment.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Seleniferous Plants and Soils Within Disturbed and Native Lands

Skinner-Martin¹,

Vance²

2002

JASMR

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Fort Carson is situated in southeastern Colorado where selenium (Se) occurs naturally in erosive geological formations. Due to both water and wind erosion on the military base, deposition of seleniferous sediments can augment soil Se levels, often exceeding the suitable management level of 0.5 mg/kg extractable Se and creating the potential for some vegetation to accumulate more than the 5 mg Se/kg total plant Se concentrations that are of concern for food chain transfer. Our objective was to locate areas in Fort Carson where plant Se concentrations can occur at levels high enough to impact wildlife, and where programs for prevention and control of soil erosion might be implemented. Soil, geology and vegetation attributes were identified in GIS coverages for sampled descriptive units exceeding suitable Se levels (> 5.0 mg Se/kg in plants, > 0.5 mg Se/kg in soils), which were then used to project the potential for similar Se levels in comparable units that were not sampled. Plant Se levels followed the order: forbs > shrubs > grasses > trees; no sampled tree material exceeded the Se suitability limit. Plant Se uptake was not necessarily dependent upon land disturbance or Se concentration in soils; however, areas having the highest plant and soil Se concentrations were primarily coincident with areas of greatest plant productivity, plentiful water supply, and soils derived from or overlying Cretaceous shales.

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Metal Ions and Plant Nutrition

Cited by 21 publications

References 141 publications

Nutrition Influence on Copper Accumulation by Brassica pekinensis Rupr.

Nutrition Influence on Copper Accumulation by Brassica pekinensis Rupr.

A Review of Lichens in Metal-Enriched Environments

Evaluation of Seleniferous Plants and Soils Within Disturbed and Native Lands

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