Histochemical detection of lead in plant tissues

Tung, Gabrielle; Temple, Patrick J.

doi:10.1002/etc.5620150612

Cited by 29 publications

(9 citation statements)

References 16 publications

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“…Wierzbicka and Antosiewicz (1993) reported that in the roots Pb is binding to cell walls and vacuoles, or by extracellular precipitation (Verma and Dubey, 2003), which prevents it from entering the cytoplasm, avoiding the toxic effects of Pb on the cytosol. Thus, cell walls can be considered as barriers to symplastic and apoplastic lead transport (Tung and Temple, 1996). The exclusor behavior of oleander under controlled conditions confirms the results obtained in the field.…”

Section: Discussionsupporting

confidence: 72%

Evaluation of the ability of Nerium oleander L. to remediate Pb-contaminated soils

Trigueros

Mingorance

Oliva

2012

Journal of Geochemical Exploration

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Section: Discussionsupporting

confidence: 72%

Evaluation of the ability of Nerium oleander L. to remediate Pb-contaminated soils

Trigueros

Mingorance

Oliva

2012

Journal of Geochemical Exploration

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“…Cadmium, taken up by the roots, accumulates preferentially in the trichomes on the leaf surface of Indian mustard (Salt et al 1995b), suggesting that Cd storage in the trichome is a detoxi®-cation mechanism. Trichomes in other plants have been reported to accumulate toxic ions, including Mn (Blamey et al 1986) and Pb (Martell 1974;Tung and Temple 1996), or to regulate Ca storage and its release (De Silva et al 1996). Expression of a type-2 metallothionein, a metal-binding protein, in trichomes of bean plants has been suggested to be a mechanism for heavy-metal tolerance (Foley and Singh 1994).…”

Section: Discussionmentioning

confidence: 98%

Accumulation of heavy metals in epidermal glands of the waterlily (Nymphaeaceae)

Lavid

Barkay

Tel‐Or

2001

Planta

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This study investigates the anatomical aspects of heavy-metal accumulation in the waterlily (Nymphaea 'Aurora', Nymphaeaceae). Epidermal glands were identified by light microscopy on the abaxial side of the leaf laminae and on the epidermis of the rhizome; glandular trichomes were observed in the petiole epidermis. Glands were not observed in the roots. Accumulation of heavy metals in these glands was monitored using a scanning electron microscope equipped for energy-dispersive spectroscopy. Further experiments showed maximal cadmium and calcium accumulation in the mature leaf lamina in daylight, and this accumulation was inhibited by the herbicide 3-(3',4'-dichlorophenyl)-1,1-dimethylurea. These results suggest that, in Nymphaea, heavy metals are accumulated primarily in association with glands found in plant organs that have direct contact with water or mud. Deposition and storage of heavy metals by these glands may represent a stage in the sequestration and detoxification of the metals. Our results raise the possibility of utilizing waterlilies for the removal of heavy metals from polluted environments.

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“…Lead can be identified by optical microscopy, e.g., by rhodizonic acid that forms red complexes with this metal (Tung and Temple 1996). Cadmium may be identified, e.g., by Leadmium reagent (Xiong et al 2009) in fluorescence and confocal microscopy.…”

Section: Detection Of Tms In Plant Cell Wallmentioning

confidence: 99%

The cell wall in plant cell response to trace metals: polysaccharide remodeling and its role in defense strategy

2010

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This review paper is focused predominantly on the role of the cell wall in the defense response of plants to trace metals. It is generally known that this compartment accumulates toxic divalent and trivalent metal cations both during their uptake by the cell from the environment and at the final stage of their sequestration from the protoplast. However, from results obtained in recent years, our understanding of the role played by the cell wall in plant defense response to toxic metals has markedly altered. It has been shown that this compartment may function not only as a sink for toxic trace metal accumulation, but that it is also actively modified under trace metal stress. These modifications lead to an increase in the capacity of the cell wall to accumulate trace metals and a decrease of its permeability for trace metal migration into the protoplast. One of the most striking alterations is the enhancement of the level of low-methylesterified pectins: the polysaccharides able to bind divalent and trivalent metal ions. This review paper will present the most recent results, especially those that are concerned with polysaccharide level, composition and distribution under trace metal stress, and describe in detail the polysaccharides responsible for metal binding and immobilization in different groups of plants (algae and higher plants). The review also contains information related to the entry pathways of trace metals into the cell wall and their detection methods.

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Histochemical detection of lead in plant tissues

Cited by 29 publications

References 16 publications

Evaluation of the ability of Nerium oleander L. to remediate Pb-contaminated soils

Evaluation of the ability of Nerium oleander L. to remediate Pb-contaminated soils

Accumulation of heavy metals in epidermal glands of the waterlily (Nymphaeaceae)

The cell wall in plant cell response to trace metals: polysaccharide remodeling and its role in defense strategy

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