Resumo -. Os tratamentos foram distribuídos no delineamento inteiramente casualizado com três repetições. Amostras do solo e do tecido vegetal foram coletadas noventa dias após a semeadura para a quantificação das massas das matérias secas da parte aérea e das raízes para a determinação do acúmulo de chumbo. Os dados obtidos foram submetidos à análise de variância e regressão. As plantas de mucuna preta apresentaram maior acúmulo de Pb em sua parte aérea, em função da massa de matéria seca produzida; não houve alteração significativa na produção da massa de matéria seca das raízes e da parte aérea em função das doses de Pb no solo.Palavras-chave -Fitoextração. Espécies Hiperacumuladoras. Poluição do Solo. Metal Pesado. Abstract -The work was to evaluate the accumulation of Pb in plant tissue of velvet bean (Mucuna aterrima Piper & Tracy.) in contaminated soil for this element and investigate the potential for soil remediation. Plants were grown in pots with a capacity of 9 dm 3 of soil. The treatments were in addition to the vessels: 18.8, 37.5, 75, 150, 300, 600 and 1200 mg kg -1 in the form of Pb (Pb (NO 3 ) 2 ). The treatments were distributed according to statistical design DIC with three replications. Samples of soil and plant tissue were collected ninety days after sowing for the quantification of mass of dry matter of shoots and roots for the determination of Pb accumulation. The results obtained were subjected to analysis of variance and regression. The plants showed greater accumulation of Pb in shoots, depending on the weight of dry matter produced; with the gradual increase in Pb concentrations in soil there was no decrease of the dry weight of roots and shoots.
ResumoAmostras do solo e do tecido vegetal foram coletadas noventa dias após a semeadura para a quantificação das massas das matérias secas da parte aérea e das raízes e para a determinação do acúmulo de chumbo nos tecidos vegetais de ambas as espécies. Os parâmetros avaliados foram submetidos à análise de variância avaliando-se o efeito dos tratamentos pelo teste de Tukey a nível de 5% de probabilidade. Os resultados significativos apresentados pelo Teste F foram submetidos à regressão polinomial. As mamoneiras apresentaram maior acúmulo de Pb nas raízes, houve uma diminuição do crescimento das plantas em função da diminuição das massas das matérias secas da parte aérea e das raízes com o aumento gradual da concentração de Pb no solo e, a adição de 1200 mg kg -1 de Pb no solo foi mais efetiva para a diminuição do crescimento das mamoneiras. Palavras-chave: Fitorremediação, fitoextração, espécies hiperacumuladoras, poluição do solo AbstractThe present work was developed with the objective to evaluate the accumulation of Pb in plant tissue of castor bean (Ricinus communis L.) in contaminated soil and investigate the potential for soil remediation. The experiment was carried out in a greenhouse at the Faculty of Agricultural Sciences/UNOESTEPresidente Prudente/SP. Plants were grown in pots with a capacity of 9 dm 3 of soil. The treatments were in addition to the vessels of 18.8 mg kg -1 , 37.5 mg kg -1 , 75 mg kg -1 , 150 mg kg -1 , 300 mg kg -1 , 600 mg kg -1 and 1200 mg kg -1 in the form of Pb (Pb(NO 3 ) 2 ). Treatments were arranged according to completely randomized design with three replications. Samples of soil and plant tissue were collected ninety days after sowing for the quantification of mass of dry matter of shoots and roots, and for determining the accumulation of lead in tissues of both species. The parameters were subjected to analysis of variance evaluating the effect of treatments by the Tukey test at 5% level of probability. The results presented by significant F-test were submitted to polynomial regression. The castor beans had a higher accumulation
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.