Índice de translocação de nutrientes em mudas de cedro (Cedrela fissilis Vell.) e de ipê-roxo (Tabebuia impetiginosa (Mart.) Standl.) submetidas a doses crescentes de cádmio, níquel e chumbo

Paiva, Haroldo Nogueira de; de, Janice Carvalho Guedes; Siqueira, José Oswaldo

doi:10.1590/s0100-67622002000400009

Cited by 30 publications

(20 citation statements)

References 7 publications

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“…The B, Cu, Pb, Mn and Zn transport from soil to the shoots was evaluated using the transfer factor (F) = SC (mg kg -1 ) + RC (mg kg -1 ) / TC (mg kg -1 ) where, SC = elements shoots concentration (Table 2); RC = elements root concentration (Table 2); TC = elements soil concentration obtained with Aqua Regia method (Table 1) (Lubben and Sauerbeck, 1991). The species ability in B, Cu, Pb, Mn and Zn translocation from roots to shoots was calculated by the translocation index (TI) suggested by Bichequer and Bohrlen cited by Paiva et al (2002): TI (%) = SQ (mg per pot)/ WPQ (mg per pot) × 100, where, SQ = element accumulation in the shoots (Table 2); WPQ = element accumulation in the whole plant (shoots + roots) ( Table 2). The plant metal accumulation capacity was calculated by the bioconcentration index (BI) suggested by Gosh and Singh (2005): TC (mg kg -1 ) / SM (mg kg -1 ) where, TC = elements soil concentration obtained with Aqua Regia method (Table 1); SM= soluble metals content obtained with CaCl2 0.05 mol L -1 (Table 2).…”

Section: Methodsmentioning

confidence: 99%

Vegetable species for phytoextraction of boron, copper, lead, manganese and zinc from contaminated soil

Santos

Rodella²,

Abreu

et al. 2010

Sci. agric. (Piracicaba, Braz.)

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Phytoremediation is an attractive option to remove metal from contaminated soil since it is a simple, low-cost, and environmentally friendly procedure. To better examine the phytoremediation potential of kenaf (Hybiscus canabinnus), mustard (Brassica juncea), turnip (Raphunus sativus) and amaranth (Amaranthus crentus) plants, a greenhouse experiment was performed in which these species were grown on a soil contaminated with Zn, Cu, Mn, Pb and B. The translocation, the bioconcentration and the removal index, the transference factor and the time to reach 50% of element removal from soil, among other indicators, were used in order to identify a hyperaccumulator. Kenaf plants were more tolerant to the conditions tested, with the highest dry matter production and no visual toxicity symptoms. Amaranth would be the species chosen to remediate the soil under field conditions as it presented the higher indexes for decontamination of Zn and Mn and was also able to remove B. Turnip showed the best results for Pb removal. All species tested were able to remove B from soil. In spite, none of the plant species tested could be characterized as a hyperaccumulator.

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Section: Methodsmentioning

confidence: 99%

Vegetable species for phytoextraction of boron, copper, lead, manganese and zinc from contaminated soil

Santos

Rodella²,

Abreu

et al. 2010

Sci. agric. (Piracicaba, Braz.)

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“…The species ability in Pb translocation from roots to shoots was estimated using the translocation index (TI) suggested by Bichequer & Bohrlen cited by Paiva et al (2002): TI (%) = TQ (mg per pot)/ WPQ (mg per pot) × 100, where, TQ = element accumulation in the shoots; WPQ = element accumulation in the whole plant (shoots + roots). These indicators allowed estimating the plant efficiency in Pb removal and also the period of time necessary to remove all soil Pb, considering four annual cultivation cycles.…”

Section: First Set Of Experiments -Effect Of Split Edta Application Umentioning

confidence: 99%

“…Usually more severe visual symptoms are observed in jack bean plants' roots when grown in a soil with a single EDTA application (Paiva et al 2000;Kabata Pendias & Pendias, 2000). In the present study, higher concentrations of Pb, up to 962 mg kg -1 , were found in plants collected 40 days after seed germination, which may explain the toxicity symptoms observed.…”

Section: Effect Of Split Edta Application Upon the Pb-uptake By Jack mentioning

confidence: 99%

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EDTA assisted phytorremediation of a Pb contamined soil: metal leaching and uptake by jack beans

Gabos¹,

Abreu

Puga

2009

Sci. agric. (Piracicaba, Braz.)

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Lead (Pb) is one of the main soil contaminants. It is also of difficult phytoremediation due to its low solubility and high retention on soil particles. EDTA application to soil is a strategy to increase heavy metal phytoextraction, but such chelants usually cause phytotoxicity and metal leaching side effects. Therefore, these research work objectives were to evaluate the effects of single (0.5 g kg -1 ) and split (0.25 + 0.25 g kg -1 ) EDTA application on Pb uptake by jack beans (Canavalia ensiformis L.) as well as on Pb vertical movement in a Pb contaminated soil material. Two sets of experiments were carried out under greenhouse conditions: in the first one, plants were grown in 3L-pots filled with a Pb-contaminated soil to evaluate Pb uptake by plants; for the second experiment, PVC-columns (42 cm height) were used to evaluate soil Pb leaching: the upper half-column (20 cm) was filled up with Pb-contaminated soil (1800 mg kg -1 ) whereas the lower half-column (20 cm) was filled with clean soil. Ten 60 mm-rainfalls with a duration of five hours were simulated by dropping distilled water on the top of columns, and leachates were collected for chemical analysis. Plants did not show any visual Pb toxicity symptoms or reduction in dry matter yield. Nevertheless, Pb uptake by jack beans regarded as total plant Pb accumulation was higher in EDTA-treated plants. Vertical Pb movement was observed mostly for the single EDTA application. EDTA addition to the soil favor Pb-phytoextraction by jack beans and the split EDTA application decrease the metal leaching, indicating less risk of environmental contamination. Key words: Canavalia ensiformis L., lead, phytoremediation, chelant LIXIVIAÇÃO E ABSORÇÃO DE Pb PELO FEIJÃO-DE-PORCO ASSISTIDO PELA APLICAÇÃO DE EDTA NO SOLORESUMO: O chumbo (Pb) é um dos principais contaminantes de solo. Os processos de remediação são dificultados devido à alta retenção do elemento às partículas do solo. A utilização do EDTA para aumentar a fitoextração dos metais do solo tem apresentado bons resultados. Contudo, os quelantes podem causar efeitos indesejáveis como a fitotoxidez e a lixiviação do metal. Nesse sentido, avaliouse o efeito da aplicação única (0,5 g kg -1 ) e parcelada de EDTA (0,25 + 0,25 g kg -1 ) na absorção de Pb pelas plantas de feijão-de-porco (Canavalia ensiformis L.) e na movimentação vertical de Pb em solo contaminado, sob condições de casa de vegetação. Em um experimento, as plantas foram crescidas em vasos contendo 3 L de solo contaminado por Pb. No outro, utilizaram-se colunas de PVC com 42 cm de altura, preenchendo-se os primeiros 20 cm com solo contaminado com 1800 mg kg -1 de Pb, seguido de outros 20 cm, com amostra de solo não contaminado. Nesse experimento, foram feitas dez lixiviações com água em volume equivalente a uma chuva de 60 mm cada. As plantas não apresentaram sintomas visuais de toxicidade de Pb, nem diferença na produção de massa seca do feijão em função dos tratamentos aplicados. No entanto, a absorção de Pb foi superior para as plantas que r...

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“…Para calcular o índice de translocação (IT) dos elementos da raiz para a parte aérea e raiz, parte aérea para os frutos, [15] utilizou-se as seguintes expressões:…”

Section: Assessment Of Toxicity Of Cadmium and Lead In Tomatounclassified

Assessment of toxicity of cadmium and lead in tomato

et al. 2014

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outros, influenciam as reações de adsorção/dessorção, precipitação/dissolução, complexação e oxirredução de metais no solo, [4] influenciando também, dessa forma, a concentração e disponibilidade dos elementos traços para as plantas. Dentre esses contaminantes encontramse os metais pesados (ou elementos traços) como o Cádmio e o Chumbo (Pb), que não apresentam quaisquer benefícios ao organismo humano e, atualmente, a contaminação do solo e das águas por estes elementos é um grave problema ambiental, devido a sua persistência e elevado poder de toxicidade.O Pb, em sua forma catiônica Pb 2+, é absorvido pelas plantas devido à sua semelhança com os metais de transição essenciais, diferindo no que se refere à translocação nas plantas, devido à sua facilidade de formar complexos com elevado impedimento estéreo [5][6]. As altas concentrações de Pb interferem na divisão celular e inibem a extensão do sistema radicular e concentrações abaixo do nível considerado tóxico podem estimular o crescimento radicular [7]. A diminuição do processo respiratório, causada pela redução na assimilação de CO 2 , provoca redução no crescimento. A interrupção do metabolismo do Ca e a inativação enzimática também são provocadas pela INTRODUÇÃOA preocupação com o nível de metais pesados advém da capacidade de ficar retido no solo, solubilizarem-se na água, da sua movimentação, da possibilidade de atingirem o lençol freático e, sobretudo, da sua absorção pelas plantas, podendo atingir, assim, a cadeia alimentar [1]. Estes elementos são amplamente distribuídos no meio ambiente, sendo depositados na água (lagos, rios e oceanos), acumulados no solo, nas plantas, nos animais, provenientes da lixiviação do solo e como produto do desenvolvimento da tecnologia moderna (poluição atmosférica e fontes antropogênicas, dentre as quais se destacam a indústria química e metalúrgica, a mineração, alguns pesticidas agrícolas e esgotos domésticos) [1][2][3].A possibilidade de contaminação ambiental por metais pesados está diretamente relacionada com os processos de adsorção-dessorção desses elementos nos solos. No solo, os metais pesados podem estar adsorvidos eletrostaticamente nos sítios de troca, na solução do solo e ligados a compostos orgânicos. Fatores como concentrações e tipos de argila, pH, capacidade de troca de cátions, concentração de matéria orgânica, entreHaving the objective of evaluating the effect of application of cadmium and lead in tomato in the content, rate of growth and translocation in different parts of the plant, tomato plants were grown in nutrient solution of Clark and submitted to rising doses of Pb: 0; 0,25; 1,0; 5,0 and 10,0 mg L -1 . Cadmium translocated 21,9% to more than lead to the aerial part showing Pb concentrated in the roots while in the fruits, the translocation of these metals reached 1,89% for Cd and 1,38% for Pb. In relation to the control treatment, the fruits production was reduced from the concentration 5,0 mg L -1 de Pb and 1,0 mg L -1 of Cd.

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Índice de translocação de nutrientes em mudas de cedro (Cedrela fissilis Vell.) e de ipê-roxo (Tabebuia impetiginosa (Mart.) Standl.) submetidas a doses crescentes de cádmio, níquel e chumbo

Cited by 30 publications

References 7 publications

Vegetable species for phytoextraction of boron, copper, lead, manganese and zinc from contaminated soil

Vegetable species for phytoextraction of boron, copper, lead, manganese and zinc from contaminated soil

EDTA assisted phytorremediation of a Pb contamined soil: metal leaching and uptake by jack beans

Assessment of toxicity of cadmium and lead in tomato

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