Physiological and ultra-structural changes in tomato seedlings induced by lead
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Iheringia. Série Botânica |
Texto Completo: | https://isb.emnuvens.com.br/iheringia/article/view/95 |
Resumo: | The aim of this study was to verify the changes in seed viability, early growth, content of photosynthetic pigments and ultra-structural changes of Lycopersicon esculentum Mill seedlings caused by lead. Seeds were exposed to different concentrations of lead acetate (zero; 0.25; 0.5 and 0.75 mM). Percent germination and seedling emergence decreased as Pb concentration increased. In the same way, root length, dry mass and aerial parts also decreased as concentrations of Pb were increased, where the effect was strong on biomass accumulation in roots. Lead negatively affected chlorophyll contents, carotenoids and leaf area. Ultrastructural analyses demonstrated changes in the thylakoids. In conclusion, the increase in Pb concentration causes reduction in seed viability, early seedling growth, and in the photosynthetic pigment contents, as a consequence of changes in chloroplasts, damaginggrowth in tomato plants. |
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Physiological and ultra-structural changes in tomato seedlings induced by leadAlterações fisiológicas e ultraestruturais de plântulas de tomate induzidas por chumbochloroplastgrowthlead acetateLycopersicon esculentumacetato de chumbocloroplastocrescimentoLycopersicon esculentumThe aim of this study was to verify the changes in seed viability, early growth, content of photosynthetic pigments and ultra-structural changes of Lycopersicon esculentum Mill seedlings caused by lead. Seeds were exposed to different concentrations of lead acetate (zero; 0.25; 0.5 and 0.75 mM). Percent germination and seedling emergence decreased as Pb concentration increased. In the same way, root length, dry mass and aerial parts also decreased as concentrations of Pb were increased, where the effect was strong on biomass accumulation in roots. Lead negatively affected chlorophyll contents, carotenoids and leaf area. Ultrastructural analyses demonstrated changes in the thylakoids. In conclusion, the increase in Pb concentration causes reduction in seed viability, early seedling growth, and in the photosynthetic pigment contents, as a consequence of changes in chloroplasts, damaginggrowth in tomato plants.O objetivo do trabalho foi analisar alterações na germinação das sementes, no crescimento inicial, no conteúdo de pigmentos fotossintéticos e mudanças na ultraestrutura anatômica de plântulas de Lycopersicon esculentum Mill. causadas pelo chumbo (Pb). Sementes de tomate foram submetidas a diferentes concentrações de acetato de chumbo (zero; 0,25; 0,5 e 0,75 mM). A porcentagem de germinação e emergência das plântulas reduziram na maior concentração de Pb. O comprimento e a massa seca da parte aérea e das raízes decresceram com o aumento da concentração do metal, sendo o efeito mais pronunciado no acúmulo de biomassa nas raízes. Os teores de clorofi la, carotenoides e área foliar foram prejudicados pelo Pb. As análises ultraestruturais demonstraram alterações nos tilacoides. Portanto, o Pb ocasiona redução na viabilidade das sementes, no crescimento inicial das plântulas e no conteúdo de pigmentos fotossintéticos, como consequência de alterações nos cloroplastos, produzindo danos no crescimento de plantas de tomate.Iheringia. Série Botânica.Iheringia, Série Botânica.2014-12-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://isb.emnuvens.com.br/iheringia/article/view/95Iheringia. Série Botânica.; Vol. 69 No. 2 (2014); 313-322Iheringia, Série Botânica.; v. 69 n. 2 (2014); 313-3222446-82310073-4705reponame:Iheringia. Série Botânicainstname:Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)instacron:FZB/RSporhttps://isb.emnuvens.com.br/iheringia/article/view/95/102Copyright (c) 2015 Iheringia. Série Botânica.info:eu-repo/semantics/openAccessMoraes, Caroline LeivasMarini, PatríciaFernando, Juliana AparecidaMoraes, Dario Munt deCastro, Luis Antônio Suita deLopes, Nei Fernandes2016-07-06T20:02:08Zoai:ojs.emnuvens.com.br:article/95Revistahttps://isb.emnuvens.com.br/iheringiaONGhttps://isb.emnuvens.com.br/iheringia/oai||iheringia-bot@fzb.rs.gov.br2446-82310073-4705opendoar:2016-07-06T20:02:08Iheringia. Série Botânica - Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)false |
dc.title.none.fl_str_mv |
Physiological and ultra-structural changes in tomato seedlings induced by lead Alterações fisiológicas e ultraestruturais de plântulas de tomate induzidas por chumbo |
title |
Physiological and ultra-structural changes in tomato seedlings induced by lead |
spellingShingle |
Physiological and ultra-structural changes in tomato seedlings induced by lead Moraes, Caroline Leivas chloroplast growth lead acetate Lycopersicon esculentum acetato de chumbo cloroplasto crescimento Lycopersicon esculentum |
title_short |
Physiological and ultra-structural changes in tomato seedlings induced by lead |
title_full |
Physiological and ultra-structural changes in tomato seedlings induced by lead |
title_fullStr |
Physiological and ultra-structural changes in tomato seedlings induced by lead |
title_full_unstemmed |
Physiological and ultra-structural changes in tomato seedlings induced by lead |
title_sort |
Physiological and ultra-structural changes in tomato seedlings induced by lead |
author |
Moraes, Caroline Leivas |
author_facet |
Moraes, Caroline Leivas Marini, Patrícia Fernando, Juliana Aparecida Moraes, Dario Munt de Castro, Luis Antônio Suita de Lopes, Nei Fernandes |
author_role |
author |
author2 |
Marini, Patrícia Fernando, Juliana Aparecida Moraes, Dario Munt de Castro, Luis Antônio Suita de Lopes, Nei Fernandes |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Moraes, Caroline Leivas Marini, Patrícia Fernando, Juliana Aparecida Moraes, Dario Munt de Castro, Luis Antônio Suita de Lopes, Nei Fernandes |
dc.subject.por.fl_str_mv |
chloroplast growth lead acetate Lycopersicon esculentum acetato de chumbo cloroplasto crescimento Lycopersicon esculentum |
topic |
chloroplast growth lead acetate Lycopersicon esculentum acetato de chumbo cloroplasto crescimento Lycopersicon esculentum |
description |
The aim of this study was to verify the changes in seed viability, early growth, content of photosynthetic pigments and ultra-structural changes of Lycopersicon esculentum Mill seedlings caused by lead. Seeds were exposed to different concentrations of lead acetate (zero; 0.25; 0.5 and 0.75 mM). Percent germination and seedling emergence decreased as Pb concentration increased. In the same way, root length, dry mass and aerial parts also decreased as concentrations of Pb were increased, where the effect was strong on biomass accumulation in roots. Lead negatively affected chlorophyll contents, carotenoids and leaf area. Ultrastructural analyses demonstrated changes in the thylakoids. In conclusion, the increase in Pb concentration causes reduction in seed viability, early seedling growth, and in the photosynthetic pigment contents, as a consequence of changes in chloroplasts, damaginggrowth in tomato plants. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-12-19 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://isb.emnuvens.com.br/iheringia/article/view/95 |
url |
https://isb.emnuvens.com.br/iheringia/article/view/95 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://isb.emnuvens.com.br/iheringia/article/view/95/102 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2015 Iheringia. Série Botânica. info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2015 Iheringia. Série Botânica. |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Iheringia. Série Botânica. Iheringia, Série Botânica. |
publisher.none.fl_str_mv |
Iheringia. Série Botânica. Iheringia, Série Botânica. |
dc.source.none.fl_str_mv |
Iheringia. Série Botânica.; Vol. 69 No. 2 (2014); 313-322 Iheringia, Série Botânica.; v. 69 n. 2 (2014); 313-322 2446-8231 0073-4705 reponame:Iheringia. Série Botânica instname:Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) instacron:FZB/RS |
instname_str |
Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) |
instacron_str |
FZB/RS |
institution |
FZB/RS |
reponame_str |
Iheringia. Série Botânica |
collection |
Iheringia. Série Botânica |
repository.name.fl_str_mv |
Iheringia. Série Botânica - Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) |
repository.mail.fl_str_mv |
||iheringia-bot@fzb.rs.gov.br |
_version_ |
1798948134693371904 |