Effect of cadmium on growth and the uptake of cadmium and other elements by durum wheat

Jalil, Abdul; Selles, F.; Clarke, J. M.

doi:10.1080/01904169409364851

Cited by 116 publications

(67 citation statements)

References 27 publications

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“…The uptake of Cd by roots of perennial ryegrass exposed to 9 × 10 -8 M Cd for 3 d was depressed by the addition of Ca, Mn, and Zn (Jarvis et al 1976). Other studies at higher, usually toxic, concentrations of Cd also indicate antagonism between Cd and Cu, Fe, Mn and Zn (Thys et al 1991;Jalil et al 1994b;Gussarsson et al 1995). Except for the study of Cataldo et al (1983), the free ion concentrations of Cd, Cu, Fe, Mn and Zn may have varied unintentionally due to competition for the Fe chelator.…”

mentioning

confidence: 94%

Cadmium accumulation in crops

Grant¹,

Buckley²,

Bailey³

et al. 1998

Can. J. Plant Sci.

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330

180

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Cadmium is a heavy metal present in soils from natural and anthropogenic sources. Plant uptake of Cd at levels present in the soil solution is dependent on a system that is largely metabolically mediated and competitive with the uptake system for Zn and possibly other metals. Much of the Cd taken up by plants is retained in the root, but a portion is translocated to the aerial portions of the plant and into the seed. The amount of Cd accumulated and translocated in plants varies with species and with cultivars within species. Soil, environmental and management factors impact on the amount of Cd accumulated in plants. Potential methods of reducing the accumulation of Cd in crops include reduction of Cd input to the soil system, site selection, management practices which decrease the concentration of Cd in the soil solution and its uptake and translocation by plants, and development and production of plant cultivars with the genetic tendency for low Cd uptake.

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mentioning

confidence: 94%

Cadmium accumulation in crops

Grant¹,

Buckley²,

Bailey³

et al. 1998

Can. J. Plant Sci.

Self Cite

330

180

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“…However, for efficient phytoextraction from soils, heavy metals must be translocated into aerial tissues for later harvest. Translocation of Cd 2ϩ from roots to shoots has been studied in diverse plant species (15)(16)(17)(18) and has been proposed to occur via the xylem of Indian mustard in a PCindependent manner (16). The molecular mechanisms for rootto-shoot Cd 2ϩ transport remain largely unknown, and PCs are predicted not to undergo long-distance transport but to enhance vacuolar heavy-metal sequestration in the cells in which they are produced.…”

mentioning

confidence: 99%

Long-distance root-to-shoot transport of phytochelatins and cadmium in Arabidopsis

Gong

Lee²,

Schroeder³

2003

Proc. Natl. Acad. Sci. U.S.A.

308

234

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Phytochelatin synthases (PCS) mediate cellular heavy-metal resistance in plants, fungi, and worms. However, phytochelatins (PCs) are generally considered to function as intracellular heavymetal detoxification mechanisms, and whether long-distance transport of PCs occurs during heavy-metal detoxification remains unknown. Here, wheat TaPCS1 cDNA expression was either targeted to Arabidopsis roots with the Arabidopsis alcohol dehydrogenase (Adh) promoter (Adh:: TaPCS1͞cad1 C admium is a widespread nonessential toxic heavy metal, released into the biosphere mostly by modern industry (1). Phytochelatins (PCs) play an essential role in heavy-metal detoxification in plants and fungi (2, 3). PCs chelate heavy metals and then PC-metal complexes are translocated across the tonoplast and sequestered in vacuoles (4, 5), thus decreasing the heavy-metal content in the cytosol of yeast and plant cells. PCs are synthesized from glutathione by the enzyme PC synthase (PCS) (6-9). However, PC research has focused mainly on PC transport into vacuoles (4, 5), and it remains unknown whether long-distance transport of PCs or PCS occurs in plants.Cd 2ϩ is taken up by plants, and plants have been proposed to provide an efficient system for heavy-metal removal from soils (10, 11). Soil composition affects Cd 2ϩ sensitivity. For example, silicon in soil reduces heavy-metal sensitivity (12, 13). Normally, Cd 2ϩ concentrations in roots are at least 10 times greater than those in shoots (14). However, for efficient phytoextraction from soils, heavy metals must be translocated into aerial tissues for later harvest. Translocation of Cd 2ϩ from roots to shoots has been studied in diverse plant species (15-18) and has been proposed to occur via the xylem of Indian mustard in a PCindependent manner (16). The molecular mechanisms for rootto-shoot Cd 2ϩ transport remain largely unknown, and PCs are predicted not to undergo long-distance transport but to enhance vacuolar heavy-metal sequestration in the cells in which they are produced.The cad1-3 mutant is a recessive, loss-of-function mutation in the Arabidopsis AtPCS1 gene (7) (9) by PCR. The TaPCS1 PCR fragment was subcloned into pBluescript II SK(ϩ) vector. A 3ϫ myc tag DNA sequence was constructed by PCR recovery from a plasmid containing c-myc and then subcloned into the pGEM-T Easy vector (Promega). The subcloned myc fragment was recovered with SpeI and SacI enzymes and then fused to the 3Ј end of the TaPCS1 ORF in the pBluescript II SK(ϩ) vector at the SpeI site. All PCR products were confirmed by sequencing (Retrogen, La Jolla, CA). The fusion sequence was then digested with BamHI and SacI and subcloned into the binary expression vector pBI121, either with the cauliflower mosaic virus 35S or the Arabidopsis alcohol dehydrogenase (Adh) promoter (20). Both constructs were transformed into the PC-deficient Arabidopsis mutant cad1-3 by direct Agrobacterium tumefaciens-mediated transformation using the floral dip technique (21). T2 seeds with 3:1 segregation on kanamycin plates were used for hom...

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“…Quanto ao Zn, em várias espécies de plantas a sua absorção foi reduzida pela presença de Cd (Jalil et al 1994a;Yang et al, 1996b;Nascimento et al, 1998;Soares, 1999).…”

Section: Resultsunclassified

Absorção de nutrientes por mudas de ipê-roxo (Tabebuia impetiginosa (Mart.) Standl.) em solução nutritiva contaminada por cádmio

et al. 2004

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Mudas de ipê-roxo, conduzidas em solução nutritiva de Clark, foram submetidas a doses crescentes de Cd: 0, 22, 44, 88 e 132 µmol/l, em delineamento de blocos ao acaso, por um período de 60 dias. Foram avaliados os teores e os conteúdos de Cd, de macro e de micronutrientes, na raiz, no caule e nas folhas. Os resultados mostraram que na raiz ocorreu redução no teor dos macronutrientes, enquanto nas folhas não houve efeito significativo. O teor radicular de Cu, Fe e Mn aumentou e o de Zn diminuiu na presença de Cd. O conteúdo radicular de macronutrientes diminuiu com a aplicação de Cd, ao passo que os conteúdos caulinar e foliar não foram afetados. O teor e o conteúdo de Cd nas diferentes partes das mudas foram crescentes em função da dose do metal pesado.

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Effect of cadmium on growth and the uptake of cadmium and other elements by durum wheat

Cited by 116 publications

References 27 publications

Cadmium accumulation in crops

Cadmium accumulation in crops

Long-distance root-to-shoot transport of phytochelatins and cadmium in Arabidopsis

Absorção de nutrientes por mudas de ipê-roxo (Tabebuia impetiginosa (Mart.) Standl.) em solução nutritiva contaminada por cádmio

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