Elementos-traço em Allium cepa L. e Lactuca sativa L.
Autor(a) principal: | |
---|---|
Data de Publicação: | 2008 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFPel - Guaiaca |
Texto Completo: | http://guaiaca.ufpel.edu.br/handle/123456789/1166 |
Resumo: | The environmental pollution with trace-elements (ETs) is an increasing problem in the modern society, having extreme importance the evaluation of these environmental risks. The use of seeds of superior plants is ideal for such tests since they are efficient, quick and of easy execution. The objectives of this work were evaluate the toxic effects on the germination and cytotoxics on the meristematics cells of Allium cepa L. and Lactuca sativa L. roots, under different concentrations of the trace-elements cadmium (0,5; 1,0; 3,0; 5,0; 7,0 and 9,0mg. L-1), arsenic (2,5; 5,0; 7,5; 10; 15; 20mg. L-1), lead (50, 100, 150, 200, 250 and 300mg. L-1), chromium (50, 100, 150, 200, 250 and 300mg. L-1) and mercury (0,25; 0,5; 1,0; 1,5; 2,0 and 2,5mg. L-1), after 168 and 48h of exhibition, respectively. In lettuce, de maximum number and classes of nucleolus per interphasic cell were observed. The results showed toxic effect of the traceelements on the germination of the seeds and Mitotic Index (IM), besides the induction of chromosomic aberrations in the meristematic cells of A. cepa L. The degree of toxicity and the different anomalies increased with the increase of ET concentration. In L. sativa it was evident that both the percentage of germination and the IM decreased with the increase of ETs concentration. The cytotoxicity caused by these ETs was demonstrated in the different chromosomic anomalies caused to the meristematic cells of this vegetable species. The presence of chrome, even in the lowest concentrations used in this study, impaired the events sequence of the germination process of lettuce seeds. Regarding the number of nucleolus, the studies demonstrated that, the lettuce has, at most, six (6) nucleolus per interphasic cell, even in the presence of the studied trace-elements. |
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http://lattes.cnpq.br/8109869372377402http://lattes.cnpq.br/2136655885281310Viegas, Judithhttp://lattes.cnpq.br/4970638153052768Silva, João Baptista dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783594U9Mauch, Carlos RogérioMendes, Maribel da Silva2014-08-20T13:25:41Z2010-10-292014-08-20T13:25:41Z2008-08-29MENDES, Maribel da Silva. Trace element in Allium cepa L. and Lactuca sativa L.. 2008. 160 f. Tese (Doutorado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2008.http://guaiaca.ufpel.edu.br/handle/123456789/1166The environmental pollution with trace-elements (ETs) is an increasing problem in the modern society, having extreme importance the evaluation of these environmental risks. The use of seeds of superior plants is ideal for such tests since they are efficient, quick and of easy execution. The objectives of this work were evaluate the toxic effects on the germination and cytotoxics on the meristematics cells of Allium cepa L. and Lactuca sativa L. roots, under different concentrations of the trace-elements cadmium (0,5; 1,0; 3,0; 5,0; 7,0 and 9,0mg. L-1), arsenic (2,5; 5,0; 7,5; 10; 15; 20mg. L-1), lead (50, 100, 150, 200, 250 and 300mg. L-1), chromium (50, 100, 150, 200, 250 and 300mg. L-1) and mercury (0,25; 0,5; 1,0; 1,5; 2,0 and 2,5mg. L-1), after 168 and 48h of exhibition, respectively. In lettuce, de maximum number and classes of nucleolus per interphasic cell were observed. The results showed toxic effect of the traceelements on the germination of the seeds and Mitotic Index (IM), besides the induction of chromosomic aberrations in the meristematic cells of A. cepa L. The degree of toxicity and the different anomalies increased with the increase of ET concentration. In L. sativa it was evident that both the percentage of germination and the IM decreased with the increase of ETs concentration. The cytotoxicity caused by these ETs was demonstrated in the different chromosomic anomalies caused to the meristematic cells of this vegetable species. The presence of chrome, even in the lowest concentrations used in this study, impaired the events sequence of the germination process of lettuce seeds. Regarding the number of nucleolus, the studies demonstrated that, the lettuce has, at most, six (6) nucleolus per interphasic cell, even in the presence of the studied trace-elements.A poluição ambiental com elementos-traço (ETs) é um problema cada vez maior da sociedade moderna, sendo a avaliação destes riscos ambientais de extrema importância. O uso de sementes de plantas superiores é ideal para tais ensaios porque são eficientes, rápidos e de fácil execução. Os objetivos deste trabalho foram avaliar os efeitos tóxicos na germinação e citotóxicos nas células meristemáticas das raízes de Allium cepa L. e de Lactuca sativa L. sob diferentes concentrações dos elementos-traço cádmio (0,5; 1,0; 3,0; 5,0; 7,0 e 9,0mg.L-1), arsênio (2,5; 5,0; 7,5; 10; 15; 20mg.L-1), chumbo (50, 100, 150, 200, 250 e 300mg.L-1), cromo (50, 100, 150, 200, 250 e 300mg.L-1) e mercúrio (0,25; 0,5; 1,0; 1,5; 2,0 e 2,5mg.L-1), após 168 e 48h de exposição, respectivamente. Observouse, em alface, o número máximo e as classes de nucléolos por célula interfásica. Os resultados mostraram efeito tóxico dos elementos-traço sobre a germinação das sementes e no Índice Mitótico (IM), além da indução de aberrações cromossômicas nas células meristemáticas de A. cepa. O grau de toxicidade e as diferentes anomalias aumentam com o aumento da concentração do ET. Em L. sativa ficou evidenciado que tanto a percentagem de germinação, como o IM decresceram com o aumento da concentração dos ETs. A citotoxicidade causada por esses ETs ficou demonstrada nas diferentes anomalias cromossômicas causadas às células meristemáticas dessa espécie vegetal. A presença de cromo, mesmo nas concentrações mais baixas utilizadas neste estudo, inviabilizou a seqüência dos eventos do processo de germinação das sementes de alface. Em relação ao número de nucléolos, os estudos demonstraram que, a alface possui, no máximo, seis (6) nucléolos por célula interfásica, mesmo na presença dos elementos-traço estudados.application/pdfporUniversidade Federal de PelotasPrograma de Pós-Graduação em AgronomiaUFPelBRFaculdade de Agronomia Eliseu MacielMetais pesadosAllium cepaLactuca sativaDivisão celularÍndice mitóticoGerminaçãoHeavy metalAllium cepa L.Lactuca sativa L.Cellular divisionMitotic índexGerminationCNPQ::CIENCIAS AGRARIAS::AGRONOMIAElementos-traço em Allium cepa L. e Lactuca sativa L.Trace element in Allium cepa L. and Lactuca sativa L.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFPel - Guaiacainstname:Universidade Federal de Pelotas (UFPEL)instacron:UFPELORIGINALTese_ Maribel_da_Silva_Mendes.pdfapplication/pdf1278110http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1166/1/Tese_%20Maribel_da_Silva_Mendes.pdfcd3b4973dbfd97e88a02745cadf7c130MD51open accessTEXTTese_ Maribel_da_Silva_Mendes.pdf.txtTese_ Maribel_da_Silva_Mendes.pdf.txtExtracted Texttext/plain239618http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1166/2/Tese_%20Maribel_da_Silva_Mendes.pdf.txtd2aba9ff6e4faa1000cfc0b25cecc79dMD52open accessTHUMBNAILTese_ Maribel_da_Silva_Mendes.pdf.jpgTese_ Maribel_da_Silva_Mendes.pdf.jpgGenerated Thumbnailimage/jpeg1752http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1166/3/Tese_%20Maribel_da_Silva_Mendes.pdf.jpg3ca0dbc59a7150293ebe8824b6534908MD53open access123456789/11662023-05-31 18:47:37.339open accessoai:guaiaca.ufpel.edu.br:123456789/1166Repositório InstitucionalPUBhttp://repositorio.ufpel.edu.br/oai/requestrippel@ufpel.edu.br || repositorio@ufpel.edu.br || aline.batista@ufpel.edu.bropendoar:2023-05-31T21:47:37Repositório Institucional da UFPel - Guaiaca - Universidade Federal de Pelotas (UFPEL)false |
dc.title.por.fl_str_mv |
Elementos-traço em Allium cepa L. e Lactuca sativa L. |
dc.title.alternative.eng.fl_str_mv |
Trace element in Allium cepa L. and Lactuca sativa L. |
title |
Elementos-traço em Allium cepa L. e Lactuca sativa L. |
spellingShingle |
Elementos-traço em Allium cepa L. e Lactuca sativa L. Mendes, Maribel da Silva Metais pesados Allium cepa Lactuca sativa Divisão celular Índice mitótico Germinação Heavy metal Allium cepa L. Lactuca sativa L. Cellular division Mitotic índex Germination CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Elementos-traço em Allium cepa L. e Lactuca sativa L. |
title_full |
Elementos-traço em Allium cepa L. e Lactuca sativa L. |
title_fullStr |
Elementos-traço em Allium cepa L. e Lactuca sativa L. |
title_full_unstemmed |
Elementos-traço em Allium cepa L. e Lactuca sativa L. |
title_sort |
Elementos-traço em Allium cepa L. e Lactuca sativa L. |
author |
Mendes, Maribel da Silva |
author_facet |
Mendes, Maribel da Silva |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/8109869372377402 |
dc.contributor.advisorLattes.por.fl_str_mv |
http://lattes.cnpq.br/2136655885281310 |
dc.contributor.advisor-co1.fl_str_mv |
Viegas, Judith |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/4970638153052768 |
dc.contributor.advisor-co2.fl_str_mv |
Silva, João Baptista da |
dc.contributor.advisor-co2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783594U9 |
dc.contributor.advisor1.fl_str_mv |
Mauch, Carlos Rogério |
dc.contributor.author.fl_str_mv |
Mendes, Maribel da Silva |
contributor_str_mv |
Viegas, Judith Silva, João Baptista da Mauch, Carlos Rogério |
dc.subject.por.fl_str_mv |
Metais pesados Allium cepa Lactuca sativa Divisão celular Índice mitótico Germinação |
topic |
Metais pesados Allium cepa Lactuca sativa Divisão celular Índice mitótico Germinação Heavy metal Allium cepa L. Lactuca sativa L. Cellular division Mitotic índex Germination CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Heavy metal Allium cepa L. Lactuca sativa L. Cellular division Mitotic índex Germination |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
The environmental pollution with trace-elements (ETs) is an increasing problem in the modern society, having extreme importance the evaluation of these environmental risks. The use of seeds of superior plants is ideal for such tests since they are efficient, quick and of easy execution. The objectives of this work were evaluate the toxic effects on the germination and cytotoxics on the meristematics cells of Allium cepa L. and Lactuca sativa L. roots, under different concentrations of the trace-elements cadmium (0,5; 1,0; 3,0; 5,0; 7,0 and 9,0mg. L-1), arsenic (2,5; 5,0; 7,5; 10; 15; 20mg. L-1), lead (50, 100, 150, 200, 250 and 300mg. L-1), chromium (50, 100, 150, 200, 250 and 300mg. L-1) and mercury (0,25; 0,5; 1,0; 1,5; 2,0 and 2,5mg. L-1), after 168 and 48h of exhibition, respectively. In lettuce, de maximum number and classes of nucleolus per interphasic cell were observed. The results showed toxic effect of the traceelements on the germination of the seeds and Mitotic Index (IM), besides the induction of chromosomic aberrations in the meristematic cells of A. cepa L. The degree of toxicity and the different anomalies increased with the increase of ET concentration. In L. sativa it was evident that both the percentage of germination and the IM decreased with the increase of ETs concentration. The cytotoxicity caused by these ETs was demonstrated in the different chromosomic anomalies caused to the meristematic cells of this vegetable species. The presence of chrome, even in the lowest concentrations used in this study, impaired the events sequence of the germination process of lettuce seeds. Regarding the number of nucleolus, the studies demonstrated that, the lettuce has, at most, six (6) nucleolus per interphasic cell, even in the presence of the studied trace-elements. |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008-08-29 |
dc.date.available.fl_str_mv |
2010-10-29 2014-08-20T13:25:41Z |
dc.date.accessioned.fl_str_mv |
2014-08-20T13:25:41Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MENDES, Maribel da Silva. Trace element in Allium cepa L. and Lactuca sativa L.. 2008. 160 f. Tese (Doutorado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2008. |
dc.identifier.uri.fl_str_mv |
http://guaiaca.ufpel.edu.br/handle/123456789/1166 |
identifier_str_mv |
MENDES, Maribel da Silva. Trace element in Allium cepa L. and Lactuca sativa L.. 2008. 160 f. Tese (Doutorado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2008. |
url |
http://guaiaca.ufpel.edu.br/handle/123456789/1166 |
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por |
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Universidade Federal de Pelotas |
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Programa de Pós-Graduação em Agronomia |
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UFPel |
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BR |
dc.publisher.department.fl_str_mv |
Faculdade de Agronomia Eliseu Maciel |
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Universidade Federal de Pelotas |
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