Potencial de utilização de Cyperus rotundus na descontaminação de áreas de descarte de resíduos industriais com elevados teores de metais

Jesus, Santos; Arévalo, R. A.; Romão, Gerson Oliveira; Rossi, Liane M.; Puga, Aline Peregrina; Nogueira, Neusa L.

doi:10.1590/s0100-83582009000400001

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…No caso do biótipo suscetível, verificou-se redução no diâmetro das raízes com a formação de aerênquima, enquanto, no biótipo resistente, houve a formação de aerênquima, mas sem modificação no diâmetro das raízes. Jesus et al (2009), ao trabalhar com efeito de resíduos industriais em Cyperus rotundus L., verificaram que, nas plantas intoxicadas, os mesofilos tornaram-se estreitos com lacunas pequenas, e a estrutura de Kranz indicou alterações de aproximadamente 50% no número de cloroplastos.…”

Section: Resultsunclassified

Características micromorfológicas de biótipos de capim‑arroz resistente e suscetível ao quinclorac

Ferreira

Concenço

Galon

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito do quinclorac nas características anatômicas de folhas e raízes de biótipos de capim-arroz (Echinochloa spp.), resistente e suscetível a este herbicida, por meio de avaliações micromorfométricas. As plantas foram cultivadas em vasos de plástico com capacidade de 250 cm 3 . As imagens dos cortes foram obtidas com microscópio de luz equipado com sistema U-Photo, acoplado à câmera digital conectada a microcomputador. Na seção transversal da lâmina foliar e das raízes, utilizouse objetiva de 10X, tendo-se avaliado 20 cortes/campos por planta, com dez medições por corte e quatro repetições por tratamento. Observaram-se diferenças entre os biótipos resistente e suscetível, tanto na ausência quanto na presença do quinclorac. O biótipo resistente apresenta lâmina foliar pouco afetada pelo herbicida; no entanto, há modificação na constituição dos tecidos radiculares com a formação mais acentuada de aerênquima. O biótipo suscetível também apresenta formação de aerênquima quando tratado com o quinclorac, mas em quantidade inferior à observada no biótipo resistente.Termos para indexação: Echinochloa, Oryza sativa, análises micromorfométricas. Micromorphological characteristics of barnyardgrass biotypes resistant and susceptible to quincloracAbstract -The objective of this work was to evaluate the effect of quinclorac on anatomical traits of leaves and roots of barnyardgrass (Echinochloa spp.) biotypes, susceptible and resistant to this herbicide, by micromorphometric assessments. Plants were grown in plastic pots with 250 cm 3 capacity. The images of plant sections were obtained with a light microscope equipped with a U-Photo system, coupled to a digital photo camera connected to a microcomputer. For cross-sections of leaf blades and roots, 10X objectives were used, and 20 sections/fields per plant were evaluated, with ten measurements per section and four replicates per treatment. Differences were observed between resistant and susceptible biotypes, both in the absence and in the presence of quinclorac. The resistant biotype shows leaf blades that are less affected by the herbicide; however, there are changes in root tissue constitution with increased aerenchyma formation. The susceptible biotype also shows formation of aerenchyma when treated with quinclorac, but in lower levels than those observed for the resistant biotype.

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Section: Resultsunclassified

Características micromorfológicas de biótipos de capim‑arroz resistente e suscetível ao quinclorac

Ferreira

Concenço

Galon

et al. 2012

Pesq. agropec. bras.

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“…In addition, phytoremediation may be limited by some technical factors, such as the high toxicity of contaminants on plants, slow decontamination (because plants do not present biochemical functions to achieve total removal of contaminants), climatic conditions, and the life cycle of the plant species. Finally, contaminated biomass should receive adequate treatment and disposal and the limitation caused by the depth of the rhizosphere (Cabral et al 2010;Ferreira and Lamas 2010;Jesus et al 2009;Marques et al 2011;Melo et al 2010;Pires et al 2003;Siebeneichler et al 2008). Phytoremediation can be implemented in different scenarios for the treatment of contaminated areas, a step that should be analyzed according to the objectives and variables of the site (Mishra et al, 2020).…”

Section: Evaluation Of Phytoremediation Mechanisms For the Treatment ...mentioning

confidence: 99%

Strategies and prospects in the recovery of contaminated soils by phytoremediation: an updated overview

Silva¹,

Rosa²,

Ferrareze³

et al. 2023

Commun. Plant. Sci.

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The contamination of soils and groundwater has attracted worldwide attention, since many contaminants are poorly biodegradable and can accumulate in living organisms, causing implications for plants, animals, and human health. The high cost of conventional remediation processes stimulates research for the development of innovative and more sustainable techniques. Likewise, phytoremediation is a cheap technology that uses plants to absorb, transform, and detoxify contaminants through in situ (phytoextraction, phytotransformation, and phytovolatilization) and ex situ mechanisms (phytostabilization and phytostimulation). Recently, phytoremediation has been adopted as a more profitable technique than physicochemical processes. Otherwise, the existence of variables, such as interactions between climate, soil, and plants, requires analysis methods for its implementation, which ensure the reduction of time and cost and improve its efficiency. Research on the application of different phytoremediation techniques is still in progress, and therefore, this study evaluated the main advantages of phytoremediation through a literature overview, comparing the most adequate remediation models in terms of economic, social, and environmental aspects. Highlighted Conclusions1. Phytoremediation consists of the use of plants and their associated microbes for environmental cleanup and recovery of contaminate soil. 2. Phytoremediation promotes social-economics benefits comparing to the conventional techniques, and ensures sustainability in environmental rehabilitation.

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“…Since not all plant species are developed in contaminated environments, as observed by Jesus et al (2009) when evaluating the phytoremediation capacity of metals by Cyperus rotundus plants collected in an area where there was discharge of industrial wastes, the first step is the identification of species which are both tolerant to the contaminant and appropriate to local conditions (MARQUES; AGUIAR; SILVA, 2011). Notwithstanding, the selection of plant species for phytoremediation of herbicide compounds presents limitations when compared to programs aimed at the remediation of other contaminants.…”

Section: Introductionmentioning

confidence: 99%

Selection of species tolerant to the herbicide sulfentrazone with potential for phytoremediation of contaminated soils

et al. 2012

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This paper aimed to select species with potential for phytoremediation of soils contaminated with the herbicide sulfentrazone. Eight species were evaluated: Arachis pintoi, Eleusine coracana, Crotalaria spectabilis, Crotalaria ochroleuca, Cajanus cajan, Leucaena leucocephala, Stizolobium cinereum, and Raphanus sativus. The experiment was set-up inside a greenhouse, using pots with a capacity of 6dm 3 filled with soil samples collected at a depth of 0-20cm. The experimental design was arranged into randomised blocks in a factorial scheme (8 × 5) with four replications, which consisted of the combination between the species and five doses of sulfentrazone (0, 200, 400, 800, and 1,600g ha -1 ). The herbicide phytotoxicity, plant heights, and dry masses of shoots and roots were evaluated. The species Cajanus cajan and Leucaena leucocephala had a higher tolerance to sulfentrazone up to a dose of 400g ha -1 , showing minor symptoms of phytotoxicity and smaller decreases in plant heights and in dry matter accumulation, both in the shoots and roots, when compared to the control treatment, indicating, thus, the potential to be used for further studies on phytoremediation of sulfentrazone in soil.

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Potencial de utilização de Cyperus rotundus na descontaminação de áreas de descarte de resíduos industriais com elevados teores de metais

Cited by 4 publications

References 4 publications

Características micromorfológicas de biótipos de capim‑arroz resistente e suscetível ao quinclorac

Características micromorfológicas de biótipos de capim‑arroz resistente e suscetível ao quinclorac

Strategies and prospects in the recovery of contaminated soils by phytoremediation: an updated overview

Selection of species tolerant to the herbicide sulfentrazone with potential for phytoremediation of contaminated soils

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