Avaliações fisiológicas e bioquímicas de plantas de aguapé (Eichhornia crassipes) cultivadas com níveis excessivos de nutrientes

Alves, Elza; Cardoso, L.R.; Savroni, J.; Ferreira, L.C.; Boaro, Carmen Sílvia Fernandes; Catâneo, A.C.

doi:10.1590/s0100-83582003000400005

Cited by 13 publications

(8 citation statements)

References 25 publications

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“…Sintomas de toxidez por Cu nas raízes foram relatadas em diversas espécies de plantas (MARQUES et al, 2000;KAHLE, 1993;ALVES et al, 2003;SOARES, 1999). Soares et al (2000), estudando duas espécies de Eucalyptus, verificaram que diferentes doses de cobre exerceram efeitos negativos no comprimento total e na massa seca das raízes para as duas espécies, sintomas esses também observados por Heale e Ormrod (1982), em plantas dos gêneros TABELA 1: Equações de regressão dos parâmetros altura de planta, matéria seca da parte aérea (MSPA), comprimento radicular (CR), área superficial específica (ASE), teor de cobre na parte aérea (Cu Parte Aérea) e teor de cobre na raiz (Cu Raiz) de angico, canafístula e timbaúva submetidas a diferentes doses de cobre no solo.…”

Section: Resultsunclassified

Comportamento de Peltophorum dubium (Spreng.) Taub., Parapiptadenia rigida (Benth.) Brenan e Enterolobium contortisiliquum (Vell.) Morong cultivadas em solo contaminado com cobre

Silva

Lupatini²,

Antoniolli³

et al. 2011

Ciênc. Florest.

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103 COMPORTAMENTO DE RESUMOSolos contaminados por cobre podem interferir no desenvolvimento fisiológico e no estabelecimento de plantas. Uma opção para revegetação desses solos é a utilização de espécies florestais nativas tolerantes ao cobre. Este trabalho teve como objetivo avaliar a tolerância de três espécies florestais nativas ao excesso de cobre no solo. As espécies utilizadas foram: angico -Parapiptadenia rigida, canafístula -Peltophorum dubium e timbaúva -Enterolobium contortisiliquum. O delineamento experimental foi inteiramente casualizado, num esquema 3 x 5, sendo três espécies florestais e cinco doses de cobre (0, 64, 128, 192 e 256 mg kg -1 de solo), com seis repetições. Determinou-se a altura de planta, massa seca da parte aérea, comprimento e área superficial específica radicular, teor de cobre na parte aérea e na raiz. A timbaúva e a canafístula apresentam tendência de armazenamento do cobre nas raízes e baixa translocação para a parte aérea. A massa seca da parte aérea da timbaúva e canafístula é incrementada com pequenas doses de cobre, enquanto que a massa seca da parte aérea do angico não é afetada pelas doses testadas. A timbaúva e o angico demonstram maior capacidade de tolerância à contaminação de cobre no solo que a canafístula. Palavras-chave: revegetação; plantas arbóreas nativas; tolerância. ABSTRACTSoils contaminated by copper may interfere with the physiological development and establishment of plants. An alternative for the revegetation of these soils is the use of native species tolerant to copper. This study aimed to evaluate the tolerance of three native forest species to excess copper in the soil. The species used were: angico -Parapiptadenia rigida, canafistula -Peltophorum dubium and timbauva -Enterolobium contortisiliquum. The experiment was completely randomized in a 3 x 5 schedule, with three tree species and five doses of copper (0, 64, 128, 192 and 256 mg kg-1 soil) with six replicates. Plant height, shoot dry weight, length and specific root surface area and copper content in shoots and roots were determined. Canafistula and timbauva species showed storage of copper in roots and low translocation to the shoot.

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Section: Resultsunclassified

Comportamento de Peltophorum dubium (Spreng.) Taub., Parapiptadenia rigida (Benth.) Brenan e Enterolobium contortisiliquum (Vell.) Morong cultivadas em solo contaminado com cobre

Silva

Lupatini²,

Antoniolli³

et al. 2011

Ciênc. Florest.

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“…Among the symptoms presented were necrosis points in the leaves, petioles and foliar bulbs; darkening of tissues; stagnation in growth and disintegration of part of the tissues at the end of the experiment (21st day). Many of these symptoms are associated with plant oxidative stress, which is related to the formation of reactive oxygen species, among them the radical superoxide (O 2 -), hydroxyl (HO*) and hydrogen peroxide (H 2 O 2 ) (Alves et al, 2003). Mendes et al (2009) verified morphological changes in E. crassipes caused by mercury, due to its toxic effects on plant growth.…”

Section: Resultsmentioning

confidence: 99%

“…Solms. (Pontederiaceae) stands out due to its highly productive capability of increasing its biomass by up to 15% per day (Alves et al, 2003), and is therefore considered an important invasive of aquatic environments in tropical and subtropical regions of the world (Holm et al, 1991).…”

Section: Introductionmentioning

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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“…In studies with Salvinia and water hyacinth under cadmium contamination, Oliveira et al (2001) found that the relative growth rate decreased with increasing Cd concentrations in the nutrient solution. There was a dramatic reduction in the relative growth rate to leaf area ratio and the net assimilation rate of water hyacinth in a solution contaminated with copper (Cu), illustrating the deleterious effects on plant growth in the presence of this element (ALVES et al, 2003). However, B. arrecta showed no significant changes in growth indices in the presence of the nutrient solution, which demonstrated its physiological plasticity under this stress condition.…”

Section: Discussionmentioning

confidence: 99%

Anatomical and physiological characteristics of tanner grass exposed to arsenic

Argenta

Oliveira

Castro

et al. 2013

RCA

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Phytoremediation is a biological process that stands out as an effective and economic alternative for the removal of toxic elements; however, its success depends on previous studies of plant species and the species' tolerance of certain pollutants. The aim was at evaluating the anatomy and physiology of Tanner grass (Brachiaria arrecta) to determine its anatomical and physiological plasticity characteristics that potentially enable arsenic tolerance. B. arrecta plants were cultivated in a greenhouse in a Hoagland-Arnon nutritive solution with the following As concentrations: 0.0, 0.25, 0.5, 1.0, 2.0 and 4.0 mg L-1. Gas exchange, anatomical characteristics, DNA quantification and arsenic absorption were evaluated at 18 and 21 days. An evaluation of plant growth was conducted to compare the selected plants at the beginning and after 21 days of the experiment. The plants absorbed the arsenic contained in the solution and showed an increase in the leaf stomatal density, mesophyll and leaf blade thickness and root endodermis and exodermis, and the anatomical modifications showed no evidence of stress in the plant structure. The gas exchange, growth and DNA content were not modified by arsenic in B. arrecta plants. The B. arrecta plants have anatomical and physiological characteristics that contribute to their survival in the presence of arsenic, possibly helped by the tolerance of this species of arsenic contamination from the nutrient solution and the lack of anatomical and physiological changes resulting in damage to this species. RESUMO: A fitorremediação é um processo biológico, que se destaca como alternativa eficaz e econômica à remoção de elementos tóxicos; porém, depende de estudos prévios de espécies vegetais e de suas características relacionadas à tolerância a esses poluentes. O objetivo deste trabalho foi avaliar a anatomia e a fisiologia de plantas de braquiária-dobrejo (Brachiaria arrecta), no intuito de detectar características de plasticidade anatômica e fisiológica, relacionadas à potencial tolerância dessa espécie ao arsênio. As plantas de B. arrecta foram cultivadas em casa de vegetação, em solução nutritiva de Hoagland-Arnon contendo as seguintes concentrações de arsênio: 0,0; 0,25; 0,5; 1,0; 2,0 e 4,0 mg L-1. Características de trocas gasosas, anatômicas, quantificação do DNA e absorção de arsênio foram avaliadas aos 18 e 21 dias. A avaliação do crescimento foi conduzida comparando-se plantas utilizadas no início do experimento e após 21 dias. As plantas absorveram o arsênio contido em solução e demonstraram aumento na densidade estomática, na espessura do mesofilo e no limbo foliar, sendo que as modificações anatômicas não indicaram evidências de estresse na estrutura das plantas. As trocas gasosas, o crescimento e o conteúdo de DNA não foram modificados pelo As nas plantas de B. arrecta. As plantas de B. arrecta apresentam características anatômicas e fisiológicas que contribuem para a sobrevivência da espécie, possivelmente por auxiliar na potencial tolerância dessas plantas à contaminação pelo...

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Avaliações fisiológicas e bioquímicas de plantas de aguapé (Eichhornia crassipes) cultivadas com níveis excessivos de nutrientes

Cited by 13 publications

References 25 publications

Comportamento de <i>Peltophorum dubium</i> (Spreng.) Taub., <i>Parapiptadenia rigida</i> (Benth.) Brenan e <i>Enterolobium contortisiliquum</i> (Vell.) Morong cultivadas em solo contaminado com cobre

Comportamento de <i>Peltophorum dubium</i> (Spreng.) Taub., <i>Parapiptadenia rigida</i> (Benth.) Brenan e <i>Enterolobium contortisiliquum</i> (Vell.) Morong cultivadas em solo contaminado com cobre

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

Anatomical and physiological characteristics of tanner grass exposed to arsenic

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