The Physiology of Metal Toxicity in Plants

Foy, C. D.; Chaney, R. L.; Shite, M C

doi:10.1146/annurev.pp.29.060178.002455

Cited by 1,927 publications

(1,016 citation statements)

References 139 publications

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“…Reduced translocation of iron is often correlated with the appearance of chlorosis in plants affected by metal toxicity (Foy, Chaney & White, 1978). However, in this case it appears that a mycorrhizal effect on iron uptake or translocation was not important in determining seedling tolerance to nickel and copper.…”

Section: Discussionmentioning

confidence: 78%

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THE EFFECT OF MYCORRHIZAL INFECTION ON THE RESPONSE OF BETULA PAPYRIFERA TO NICKEL AND COPPER

1986

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SUMMARYThe role of ectomycorrhizas in the metal tolerance of birch seedlings from Sudbury, Ontario was investigated. Betula papyrifera Marsh, is one of the few tree species able to survive in the copper-and nickel-polluted area near Sudbury. Two types of birch seedlings were tested; those inoculated with Laccaria proxima (Boud.) Pat., Lactarius hibbardae Peck, Lactarius rufus (Scop, ex Fr.) Fries, or Scleroderma fiavidum E. & E. isolates originating from the Sudbury area, and those which were not inoculated. Once the seedlings were infected, they were grown in sand culture containing 34 or 85 fiM Ni, 32 or 63 fiM Cu, or a control solution. At the low nickel concentration, the mycorrhizal plants, especially those infected with S. fiavidum, grew significantly better than did non-mycorrhizal plants. At the higher nickel concentration, S.flaviduminfected seedlings weighed 86 % of controls without nickel, while the other seedlings weighed only 52 to 61 % of control. The good growth of 5. fiavidum-'mfected birch seedlings may have been due to retention of nickel in the mycorrhizas. These seedlings had the highest root nickel contents and the lowest stem nickel contents. At the high concentration of copper, growth of the mycorrhizal seedlings was significantly reduced compared with the non-mycorrhizal seedlings. This reduction in growth of infected seedlings did not relate to an increase in the uptake or translocation of copper. Under the low copper treatment, infection with mycorrhizal fungi did not affect seedling growth. The potential role of iron and phosphorus in affecting host metal tolerance was investigated. Changes in the tissue concentrations of these elements did not relate to the effect of the fungi on metal tolerance.

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Section: Discussionmentioning

confidence: 78%

“…If the rhizosphere pH could be raised significantly, uptake of nickel would be reduced due to the formation of nickel hydroxides (Pratt, Bair & McLean, 1964). Alterations in rhizosphere pH as a mechanism of tolerance to high aluminum concentrations have been described for wheat and barley (Foy et al, 1978).…”

Section: Discussionmentioning

confidence: 99%

THE EFFECT OF MYCORRHIZAL INFECTION ON THE RESPONSE OF BETULA PAPYRIFERA TO NICKEL AND COPPER

1986

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“…Cadmium, on the other hand, is a non-essential heavy metal resulting from agricultural, mining, industrial and even from the exhaust smoke emitted by vehicles [5]. Chromium is also a toxic environmental pollutant which can cause detrimental effects to plants and animals [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Heavy Metals in Sediments of Iloilo Batiano River, Philippines

Gil¹,

Sarinas²,

Gellada³

et al. 2014

IJESD

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Abstract-No study have existed on heavy metals present in the river of Iloilo Batiano, Philippines. Thus, this study was conducted to determine the presence and quantities of heavy metals specifically cadmium, chromium and lead in the sediments of Iloilo Batiano River. Furthermore, water physicochemical parameters were determined such as pH and temperature, in situ. Three sampling stations were identified adjacent to (1) Batiano Bridge of Oton, Iloilo; (2) Sto. Niño Bridge of Villa, Iloilo City and (3) Calumpang Bridge of Molo, Iloilo City, respectively. Three (two sides and at the center perpendicular to the river) 500 g surface sediments were collected in each of the sampling station for a total of nine sediment samples stored in a sterile ziplock and were immediately transported at the CAS-ASL of UPV, Miag-ao, Iloilo for the quantification of metals through flame atomic absorption spectrophotometry (FAAS). Available cadmium was below detection limit and it appeared that available Pb > Cr in the three points of the river in the three sampling stations. Available chromium and lead have high accumulation in station three (Calumpang Bridge). This study provides information on the heavy metal status of the river, awareness to the public and for further conservation of the river.

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“…Aluminium toxicity (Al 3+ ) is a serious problem limiting crop productivity in acid soil which comprises large areas of the world (Kochian 1995) particularly in the tropics and subtropics (Foy et al 1978). The problem is particularly serious in strongly acid subsurface soil horizons (pH<5.5) that are difficult to lime.…”

Section: Introductionmentioning

confidence: 99%

Screening of pigeonpea genotypes for nutrient uptake efficiency under aluminium toxicity

Choudhary

Singh

2011

Physiol Mol Biol Plants

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For increasing pigeonpea production in India, it is necessary to expand its area in non-traditional areas such as north-eastern states, which have considerable area under acidic soils. In such soils, aluminium toxicity, which is a major yield limiting factor, interferes with nutrient uptake efficiency of crop plants. 32 genotypes of pigeonpea [Cajanus cajan (L.) Millsp.] were screened for tolerance to aluminium toxicity at four different aluminium concentrations (41, 82, 123 and 205 μM Al) by hematoxylin staining and root re-growth methods. The results of the two screening methods were consistent, suggesting that either of the two methods could be used for screening purpose. The most tolerant (IPA 7-10, T 7, 67 B and GT 101E) and sensitive (Bahar, Pusa 9 and Pusa 2002-2) genotypes were assessed for root and shoot aluminium contents in hydroponic assay at 0, 41, 82, 123 and 205 μM aluminium concentrations. Root and shoot aluminium contents were significantly lower in the tolerant than sensitive genotypes, indicating that aluminium tolerance mechanism involved aluminium exclusion and perhaps internal detoxification. Tolerant and sensitive genotypes were further assessed for phosphorus, potassium, calcium and magnesium contents in their root and shoot. Tolerant genotypes (IPA 7-10, T 7, 67 B and GT 101E) accumulated significantly high amounts of these nutrients (>1.5 times) compared to the sensitive ones. Better performance of tolerant genotypes could be ascribed to better nutrient uptake efficiency and distribution within the plants.

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The Physiology of Metal Toxicity in Plants

Cited by 1,927 publications

References 139 publications

THE EFFECT OF MYCORRHIZAL INFECTION ON THE RESPONSE OF BETULA PAPYRIFERA TO NICKEL AND COPPER

THE EFFECT OF MYCORRHIZAL INFECTION ON THE RESPONSE OF BETULA PAPYRIFERA TO NICKEL AND COPPER

Assessment of Heavy Metals in Sediments of Iloilo Batiano River, Philippines

Screening of pigeonpea genotypes for nutrient uptake efficiency under aluminium toxicity

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