Physiological and ultra-structural changes in tomato seedlings induced by lead

Detalhes bibliográficos
Autor(a) principal: Moraes, Caroline Leivas
Data de Publicação: 2014
Outros Autores: Marini, Patrícia, Fernando, Juliana Aparecida, Moraes, Dario Munt de, Castro, Luis Antônio Suita de, Lopes, Nei Fernandes
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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spelling 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

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