Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco
Ano de defesa: | 2020 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
Centro de Ciências Naturais e Exatas |
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Agrobiologia
|
Departamento: |
Ciências Biológicas
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/22250 |
Resumo: | The accumulation of metals in soils such as Zinc (Zn) is observed in vineyards from several countries, including Brazil, in the vineyards of the Rio Grande do Sul campaign. The prolonged use of fungicides containing Zn in its composition, used to control fungal diseases in grapevines, cause the accumulation of this metal in the soil. The toxic effects of this metal can cause restrictions in the nutrient absorption process, in addition to promoting disturbances that compromise cell expansion and, consequently, lower growth. Zn can be a limiting factor for the development of native grass species that coexist between the rows of vineyards when present in high concentrations in the growth medium. The objective of this work was to characterize the physiological responses of grass species native to the pampa biome exposed to excess Zn, as well as to evaluate which species are more adapted to this condition. Study I was carried out in a hydroponic cultivation system containing three Zn concentrations (2, 150 and 300 μM) and four grass species (Paspalum notatum, Paspalum plicatulum, Axonopus affinis and Andropogon lateralis). At 40 days of cultivation, gas exchange, fresh and dry mass, biometric parameters of the root system, biochemical attributes, concentrations of Zn and nutrients in plant tissues were determined. Study II was conducted with three species of grasses Axonopus affinis, Paspalum notatum and Paspalum plicatulum submitted to five doses of Zn (0, 30, 60, 120 and 180 mg kg-1). At 90 days of cultivation, leaf gas exchange, determination of Zn concentration in soil and tissue, dry mass production, concentration of photosynthetic pigments, soluble proteins, concentration of nutrients in tissue, enzyme activity of POD and SOD, concentration were determined. of H2O2 and of TBARS. In study I, the increment of Zn doses in the nutrient solution increased the Zn concentration in the roots and shoots of the four species, however, it did not change the biomass growth. The rate of net assimilation of CO2 was increased with the addition of Zn concentrations for all species, mainly at the dose of 300 μM. Biochemical parameters, in general, were not affected by high Zn concentrations. The increase in Zn doses influenced the oxidative stress parameters (TBARS and H2O2) in a distinct way. Nutritional balance was affected in the four species with increasing Zn doses. Despite the physiological changes observed, the four species in this study showed great adaptation to the increased availability of Zn. In study II, the Zn content in the soil increased linearly with the application of Zn as well as the Zn concentration in the roots and shoots of the three species. Biochemical parameters, in general, were affected by high Zn concentrations. The increase in Zn doses influenced the oxidative stress parameters (H2O2 and TBARS) in a distinct way, and the increases in SOD and POD activities were correlated with the decrease in oxidative stress. The physiological evaluations analyzed indicate that the species Axonopus affinis is more tolerant to excess Zn. |
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2021-09-21T18:11:17Z2021-09-21T18:11:17Z2020-08-31http://repositorio.ufsm.br/handle/1/22250The accumulation of metals in soils such as Zinc (Zn) is observed in vineyards from several countries, including Brazil, in the vineyards of the Rio Grande do Sul campaign. The prolonged use of fungicides containing Zn in its composition, used to control fungal diseases in grapevines, cause the accumulation of this metal in the soil. The toxic effects of this metal can cause restrictions in the nutrient absorption process, in addition to promoting disturbances that compromise cell expansion and, consequently, lower growth. Zn can be a limiting factor for the development of native grass species that coexist between the rows of vineyards when present in high concentrations in the growth medium. The objective of this work was to characterize the physiological responses of grass species native to the pampa biome exposed to excess Zn, as well as to evaluate which species are more adapted to this condition. Study I was carried out in a hydroponic cultivation system containing three Zn concentrations (2, 150 and 300 μM) and four grass species (Paspalum notatum, Paspalum plicatulum, Axonopus affinis and Andropogon lateralis). At 40 days of cultivation, gas exchange, fresh and dry mass, biometric parameters of the root system, biochemical attributes, concentrations of Zn and nutrients in plant tissues were determined. Study II was conducted with three species of grasses Axonopus affinis, Paspalum notatum and Paspalum plicatulum submitted to five doses of Zn (0, 30, 60, 120 and 180 mg kg-1). At 90 days of cultivation, leaf gas exchange, determination of Zn concentration in soil and tissue, dry mass production, concentration of photosynthetic pigments, soluble proteins, concentration of nutrients in tissue, enzyme activity of POD and SOD, concentration were determined. of H2O2 and of TBARS. In study I, the increment of Zn doses in the nutrient solution increased the Zn concentration in the roots and shoots of the four species, however, it did not change the biomass growth. The rate of net assimilation of CO2 was increased with the addition of Zn concentrations for all species, mainly at the dose of 300 μM. Biochemical parameters, in general, were not affected by high Zn concentrations. The increase in Zn doses influenced the oxidative stress parameters (TBARS and H2O2) in a distinct way. Nutritional balance was affected in the four species with increasing Zn doses. Despite the physiological changes observed, the four species in this study showed great adaptation to the increased availability of Zn. In study II, the Zn content in the soil increased linearly with the application of Zn as well as the Zn concentration in the roots and shoots of the three species. Biochemical parameters, in general, were affected by high Zn concentrations. The increase in Zn doses influenced the oxidative stress parameters (H2O2 and TBARS) in a distinct way, and the increases in SOD and POD activities were correlated with the decrease in oxidative stress. The physiological evaluations analyzed indicate that the species Axonopus affinis is more tolerant to excess Zn.O acúmulo de metais nos solos a exemplo do Zinco (Zn) é observado em vinhedos de vários países, inclusive no brasil, nos vinhedos da campanha gaúcha. O uso prolongado de fungicidas contendo Zn em sua composição, utilizados para o controle de doenças fúngicas em videiras, ocasionam o acúmulo deste metal no solo. Os efeitos tóxicos deste metal podem causar restrições no processo de absorção de nutrientes, além de promover distúrbios que comprometem a expansão celular e consequentemente menor crescimento. O Zn pode ser fator limitante para o desenvolvimento das espécies de gramineas nativas que coabitam as entrelinhas dos vinhedos quando presente em altas concentrações no meio de crescimento. O objetivo desse trabalho foi caracterizar as respostas fisiológicas de espécies de gramíneas nativas do bioma pampa expostas ao excesso de Zn, bem como avaliar quais as espécies são mais adaptadas para essa condição. O estudo I foi conduzido em sistema de cultivo hidropônico contendo três concentrações de Zn (2, 150 e 300 μM) e quatro espécies de gramíneas (Paspalum notatum, Paspalum plicatulum, Axonopus affinis e Andropogon lateralis). Aos 40 dias de cultivo, foram deteminados as trocas gasosas, massa fresca e seca, parâmetros biométricos do sistema radicular, atributos bioquímicos, concentrações de Zn e nutrientes nos tecidos das plantas. O estudo II foi conduzido com três espécies de gramíneas Axonopus affinis, Paspalum notatum e Paspalum plicatulum submetidas a cinco doses de Zn (0, 30, 60, 120 e 180 mg kg-1). Aos 90 dias de cultivo foram determinadas as trocas gasosas da folha, determinação da concentração Zn no solo e no tecido, produção de massa seca, concentração de pigmentos fotossintéticos, proteínas solúveis, concentração de nutrientes nos tecidos, atividade da enzima POD e SOD, concentração de H2O2 e de TBARS. No estudo I, o incremento das doses de Zn na solução nutritiva aumentou a concentração de Zn nas raízes e parte aérea das quatro espécies, no entanto, não ocasionou alteração no crescimento em biomassa. A taxa de assimilação líquida de CO2 foi aumentada com o acréscimo das concentrações de Zn para todas as espécies, principalmente na dose de 300 μM. Os parâmetros bioquímicos, em geral, não foram afetados pelas altas concentrações de Zn. O incremento das doses de Zn influenciou de modo distinto os parâmetros de estresse oxidativo (TBARS e H2O2). O balanço nutricional foi afetado nas quatro espécies com o aumento crescente das doses de Zn. Apesar das alterações fisiológicas observadas, as quatro espécies deste estudo apresentaram grande adaptação ao aumento da disponibilidade de Zn. No estudo II o teor de Zn no solo aumentou linearmente com a aplicação de Zn bem como a concentração de Zn nas raízes e parte aérea das três espécies. Os parâmetros bioquímicos, em geral, foram afetados pelas altas concentrações de Zn. O incremento das doses de Zn influenciou de modo distinto os parâmetros de estresse oxidativo (H2O2 e TBARS), sendo que os aumentos das atividades da SOD e POD foram correlacionados com a diminuição do estresse oxidativo. As avaliações fisiológicas analisadas indicam que a espécie Axonopus affinis é mais tolerante ao excesso de Zn.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de Ciências Naturais e ExatasPrograma de Pós-Graduação em AgrobiologiaUFSMBrasilCiências BiológicasAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessToxidezFotossínteseNutrientesPastagens naturiasToxicityPhotosynthesisNutrientsNatural pasturesCNPQ::CIENCIAS BIOLOGICASAspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zincoPhysiological aspects of native South American grass submitted to excessive zincinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisNicoloso, Fernando Teixeirahttp://lattes.cnpq.br/0881828847600446Brunetto, GustavoMaldaner, Joseilahttp://lattes.cnpq.br/7768401411404283Milanesi, Gabriela Descovi2000000000066006006006006003aa5c4d2-4e91-4fa4-a5f4-ffd2a4121ed7d6dafe6e-78c3-41f3-aa5e-a814f52a5f1bbeae2771-828d-4d50-8f5d-fc465c3b0c094d30470f-e7c1-4ada-9259-25a8043156fereponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGAGROBIOLOGIA_2020_MILANESI_GABRIELA.pdfDIS_PPGAGROBIOLOGIA_2020_MILANESI_GABRIELA.pdfDissertaçãoapplication/pdf2286095http://repositorio.ufsm.br/bitstream/1/22250/1/DIS_PPGAGROBIOLOGIA_2020_MILANESI_GABRIELA.pdf209d3999c304ceb2220b1f76e64e24a1MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco |
dc.title.alternative.eng.fl_str_mv |
Physiological aspects of native South American grass submitted to excessive zinc |
title |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco |
spellingShingle |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco Milanesi, Gabriela Descovi Toxidez Fotossíntese Nutrientes Pastagens naturias Toxicity Photosynthesis Nutrients Natural pastures CNPQ::CIENCIAS BIOLOGICAS |
title_short |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco |
title_full |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco |
title_fullStr |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco |
title_full_unstemmed |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco |
title_sort |
Aspectos fisiológicos de gramíneas nativas da América do Sul submetidas ao excesso de zinco |
author |
Milanesi, Gabriela Descovi |
author_facet |
Milanesi, Gabriela Descovi |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Nicoloso, Fernando Teixeira |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0881828847600446 |
dc.contributor.referee1.fl_str_mv |
Brunetto, Gustavo |
dc.contributor.referee2.fl_str_mv |
Maldaner, Joseila |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7768401411404283 |
dc.contributor.author.fl_str_mv |
Milanesi, Gabriela Descovi |
contributor_str_mv |
Nicoloso, Fernando Teixeira Brunetto, Gustavo Maldaner, Joseila |
dc.subject.por.fl_str_mv |
Toxidez Fotossíntese Nutrientes Pastagens naturias |
topic |
Toxidez Fotossíntese Nutrientes Pastagens naturias Toxicity Photosynthesis Nutrients Natural pastures CNPQ::CIENCIAS BIOLOGICAS |
dc.subject.eng.fl_str_mv |
Toxicity Photosynthesis Nutrients Natural pastures |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS BIOLOGICAS |
description |
The accumulation of metals in soils such as Zinc (Zn) is observed in vineyards from several countries, including Brazil, in the vineyards of the Rio Grande do Sul campaign. The prolonged use of fungicides containing Zn in its composition, used to control fungal diseases in grapevines, cause the accumulation of this metal in the soil. The toxic effects of this metal can cause restrictions in the nutrient absorption process, in addition to promoting disturbances that compromise cell expansion and, consequently, lower growth. Zn can be a limiting factor for the development of native grass species that coexist between the rows of vineyards when present in high concentrations in the growth medium. The objective of this work was to characterize the physiological responses of grass species native to the pampa biome exposed to excess Zn, as well as to evaluate which species are more adapted to this condition. Study I was carried out in a hydroponic cultivation system containing three Zn concentrations (2, 150 and 300 μM) and four grass species (Paspalum notatum, Paspalum plicatulum, Axonopus affinis and Andropogon lateralis). At 40 days of cultivation, gas exchange, fresh and dry mass, biometric parameters of the root system, biochemical attributes, concentrations of Zn and nutrients in plant tissues were determined. Study II was conducted with three species of grasses Axonopus affinis, Paspalum notatum and Paspalum plicatulum submitted to five doses of Zn (0, 30, 60, 120 and 180 mg kg-1). At 90 days of cultivation, leaf gas exchange, determination of Zn concentration in soil and tissue, dry mass production, concentration of photosynthetic pigments, soluble proteins, concentration of nutrients in tissue, enzyme activity of POD and SOD, concentration were determined. of H2O2 and of TBARS. In study I, the increment of Zn doses in the nutrient solution increased the Zn concentration in the roots and shoots of the four species, however, it did not change the biomass growth. The rate of net assimilation of CO2 was increased with the addition of Zn concentrations for all species, mainly at the dose of 300 μM. Biochemical parameters, in general, were not affected by high Zn concentrations. The increase in Zn doses influenced the oxidative stress parameters (TBARS and H2O2) in a distinct way. Nutritional balance was affected in the four species with increasing Zn doses. Despite the physiological changes observed, the four species in this study showed great adaptation to the increased availability of Zn. In study II, the Zn content in the soil increased linearly with the application of Zn as well as the Zn concentration in the roots and shoots of the three species. Biochemical parameters, in general, were affected by high Zn concentrations. The increase in Zn doses influenced the oxidative stress parameters (H2O2 and TBARS) in a distinct way, and the increases in SOD and POD activities were correlated with the decrease in oxidative stress. The physiological evaluations analyzed indicate that the species Axonopus affinis is more tolerant to excess Zn. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020-08-31 |
dc.date.accessioned.fl_str_mv |
2021-09-21T18:11:17Z |
dc.date.available.fl_str_mv |
2021-09-21T18:11:17Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/22250 |
url |
http://repositorio.ufsm.br/handle/1/22250 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
200000000006 |
dc.relation.confidence.fl_str_mv |
600 600 600 600 600 |
dc.relation.authority.fl_str_mv |
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Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Naturais e Exatas |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Agrobiologia |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Ciências Biológicas |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Naturais e Exatas |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
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Universidade Federal de Santa Maria (UFSM) |
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UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
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