Relações da anatomia radicular na absorção, no acúmulo e na tolerância ao chumbo em Echinodorus grandiflorus

Ribeiro, Estefânia Santos; Pereira, Márcio Paulo; Castro, Evaristo Mauro de; Baroni, Gabriel de Resende; Correa, Felipe; Pereira, Fabricio José

doi:10.1590/1807-1929/agriambi.v19n6p605-612

Cited by 22 publications

(13 citation statements)

References 25 publications

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“…Baroni GR, Pereira MP, Corrêa FF, Castro EM, Pereira FJ 2 Although finding new Cd-tolerant species is essential, understanding how plants cope with heavy metal stress is necessary to improve their remediation potential. Data show that plant tolerance to heavy metal toxicity is related to both their physiological and anatomical traits (Pereira et al, 2014;Ribeiro et al, 2015;Silva et al, 2013). Furthermore, Cd-tolerant species can show anatomical modifications that improve their root and leaf anatomy (Pereira et al, 2013).…”

Section: -6mentioning

confidence: 99%

Cadmium Tolerance During Seed Germination and Seedling Growth of Schinus molle (Anacardiaceae)

et al. 2020

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Cadmium (Cd) is one of the most toxic elements to plants, so Cd-tolerant trees should be used in reforestation or remediation systems. In this study the effects of Cd on seed germination and early seedling growth were evaluated in Schinus molle plants. Seeds of S. molle were treated with Cd at concentrations of 0 (control), 0.01, 0.02, 0.05, and 0.125 mM using Cd(NO 3) 2. Seed germination parameters and seedling growth traits were evaluated 33 days after the experiment started. Seeds and roots were sampled for anatomical evaluation and processed with plant microtechniques. No effects of Cd were found on the germination percentage of S. molle seeds. However, seedlings' shoot and root fresh masses and lengths increased with Cd treatment. Cadmium increased root cortex and endodermis thickness and reduced the percentage of vascular tissues in seedlings. Schinus molle seeds and seedlings thus showed tolerance to Cd related to anatomical adaptations.

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Section: -6mentioning

confidence: 99%

Cadmium Tolerance During Seed Germination and Seedling Growth of Schinus molle (Anacardiaceae)

et al. 2020

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“…O Pb é absorvido pelas raízes, provocando diversas alterações morfológicas, fisiológicas e bioquímicas, tais como: inibição da germinação de sementes (RIBEIRO et al, 2015), redução do crescimento das raízes ou de toda a planta, clorose foliar, modificações nas atividades enzimáticas e na fotossín-tese (PEREIRA et al, 2013a). Além disso, ele pode provocar mudanças na permeabilidade e na composição da membrana …”

Section: Resultsunclassified

“…A técnica de fitorremediação tem sido indicada como uma maneira de restaurar locais contaminados por metais pesados, utilizando espécies de plantas tolerantes para a remoção desses poluentes do solo (RIBEIRO et al, 2015). Para que essa técnica seja possível, é preciso identificar plantas hiperacumuladoras, necessitando de mais estudos fisiológicos e morfoló-gicos (PEREIRA, 2010).…”

Section: Palavras-chaveunclassified

Caracterização morfométrica e efeitos ecotoxicológicos do chumbo na germinação de sementes de Schinus terebinthifolius Raddi

et al. 2018

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RESUMO: Schinus terebinthifolius Raddi é uma árvore perenifólia, encontrada em diversos biomas brasileiros e utilizada no reflorestamento de áreas degradadas que podem estar contaminadas por metais pesados. Esta pesquisa determinou as características morfométricas e avaliou os efeitos ecotoxicológicos do chumbo (Pb) no desenvolvimento germinativo da aroeira pimenteira (S. terebinthifolius). Foram determinadas a umidade (%) e 12 medidas morfométricas das sementes (n = 230), a saber: peso de 1.000 sementes, comprimento, largura, espessura, alongamento em 3 dimensões (comprimento, largura e espessura), diâmetro médio geométrico, área superficial, volume, esfericidade e densidade volumétrica. Os efeitos ecotoxicológicos do Pb foram avaliados em 8 diferentes concentrações (0,2; 0,4; 0,6; 0,8; 1,0; 2,0; 4,0 e 6,0 mM) em triplicatas com 40 sementes por replicata. As variáveis resposta foram: volume da semente durante o desenvolvimento germinativo, porcentagem de germinação e velocidade de germinação. O Pb presente em baixas concentrações causa efeitos tóxicos que afetam o percentual (0,2 mM) e a velocidade de germinação (0,4 mM). Apesar desses efeitos, eles não se elevaram quando a S. terebinthifolius foi exposta a concentrações maiores de Pb. Assim, é provável que a S. terebinthifolius tenha tolerância ou adaptação fisiológica ao Pb. Entretanto, em ambientes contaminados por esse metal, o seu estabelecimento inicial pode ser comprometido ou impossibilitado devido a esse estresse químico.

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“…The cell wall of the roots maintain direct contact with metal ions dissolved in the medium, with this contact related to the plant's increased filtration capacity, and consequently an increased tolerance to contaminants (Rodrigues et al, 2016). An example of this mechanism was presented by Ribeiro et al (2015) when he associated the highest accumulation of lead (Pb) in Echinodorus grandiflorus Rich. ex Engelm.…”

Section: Resultsmentioning

confidence: 99%

Effect of concentration and exposure time on copper accumulation in Eichhornia crassipes (Mart.) Solms. (Pontederiaceae)

Lunardi¹,

Freitas²,

Souza³

et al. 2017

Sci. Elec. Arch.

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Different factors can influence the absorption and storage of substances in plant biomass. In this study, we evaluated the effect of copper concentration in growth medium and plant exposure time on copper accumulation in Eichhornia crassipes (Mart.) Solms. (Pontederiaceae) roots and leaves under controlled conditions. Plants were subjected to four treatments of copper concentrations of 1, 3 and 5 μg.mL -1 , with a control treatment of 0 μg.mL -1, and evaluated at seven-day intervals over 21 days. Copper concentration in biomass was analysed by atomic absorption spectroscopy with flame atomisation. The results showed that copper concentration in the growth medium and time of exposure had a significant effect on the amount of copper accumulated by E. crassipes roots and leaves, with roots more efficient compared to leaves. It is likely that E. crassipes has mechanisms for the translocation of metal from the root system to the leaves. Symptoms of copper toxicity were observed in the vegetative parts of the plants at the end of the experiments. This study demonstrates that E. crassipes presents great potential in the absorption and accumulation of copper under laboratory conditions, indicating its effectiveness for applications in phytoremediation processes.

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Relações da anatomia radicular na absorção, no acúmulo e na tolerância ao chumbo em Echinodorus grandiflorus

Cited by 22 publications

References 25 publications

Cadmium Tolerance During Seed Germination and Seedling Growth of Schinus molle (Anacardiaceae)

Cadmium Tolerance During Seed Germination and Seedling Growth of Schinus molle (Anacardiaceae)

Caracterização morfométrica e efeitos ecotoxicológicos do chumbo na germinação de sementes de Schinus terebinthifolius Raddi

Effect of concentration and exposure time on copper accumulation in Eichhornia crassipes (Mart.) Solms. (Pontederiaceae)

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