Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)

Detalhes bibliográficos
Autor(a) principal: Vasconcelos Filho, Sebastiao Carvalho
Data de Publicação: 2014
Tipo de documento: Tese
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
Texto Completo: https://tede.ufrrj.br/jspui/handle/jspui/4082
Resumo: The evaluation of the toxicity caused by aluminum plants in the Brazilian cerrado regions has great importance for the development of agriculture, because these areas are dominated by oxisols, which are acid soils with low cation exchange capacity, high exchangeable aluminum saturation and very low phosphorus available to plants. Little attention has been given to communities of native cerrado plants that tolerate acid soil conditions, such as the species Anacardium othonianum Rizz., fruit plant and popularly known as the tree cashew of the cerrado, with many food, nutritional and medicinal applications. Thus, the aim of this study was to evaluate the effects of aluminum on root growth, nutrient accumulation and root structure of seedlings of A. othonianum Rizz. The germinated seedlings were growth in a nutrient solution only composed of 0,1 mM CaCl2.2H2O, and also in a complete low ionic strength solution, both with concentrations of aluminum (0, 150, 300, 600 and 1200 ?M) nutrient solution. Subsequently, the seedlings were evaluated for root growth, root elongation, dry mass and anatomical studies using techniques of light and fluorescence microscopy field. Emergence percentage and speed index emergence seedlings using washed sand moistened with a solution of aluminum in different concentrations were also assessed. The results showed that aluminum caused a reduction in the rate of root growth and root elongation relative phytotoxicity being observed from 150 ?M Al in solution. Reduction in the rate of emergence rate, percentage of seedlings emergence and anatomical changes in root tips, particularly in meristematic regions was also observed being demonstrated stimulation of these cells with vacuolization and internalization of aluminum in different tissues. Aluminum decreased absorption of most nutrients in the seedlings, with the following order of reduction in roots: P> Ca> Mg> N for macronutrients and Fe> Cu for micronutrients; reduction in leaves followed the order: Ca> Mg> P. On the other hand, higher concentrations of aluminum increased N and K content in leaves and Mn in roots. The K content in roots, and Fe, Cu and Mn in leaves were not affected by concentrations of aluminum. The results showed that this species tolerates high concentrations of aluminum, but the fall in rates of root growth and nutrient content can reduced the production of nut and pseudofruit in acid soils with high concentrations of this element, since the reduction in root growth makes plant operates less volume of soil, which in turn affects water and nutrient absorption.
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spelling Jacob Neto, Jorge088505851-08http://lattes.cnpq.br/6508017274417976Silva, Fabiano Guimar?esAlves, Jos? MiltonGoi, Silvia ReginaVasconcellos, Marco Ant?nio da Silva004225241-58http://lattes.cnpq.br/8676132636864862Vasconcelos Filho, Sebastiao Carvalho2020-10-26T11:25:33Z2014-07-25Vasconcelos Filho, Sebastiao Carvalho. Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.). 2014. [66 f.]. Tese( Programa de P?s-Gradua??o em Fitotecnia) - Universidade Federal Rural do Rio de Janeiro, [Serop?dica - RJ] .https://tede.ufrrj.br/jspui/handle/jspui/4082The evaluation of the toxicity caused by aluminum plants in the Brazilian cerrado regions has great importance for the development of agriculture, because these areas are dominated by oxisols, which are acid soils with low cation exchange capacity, high exchangeable aluminum saturation and very low phosphorus available to plants. Little attention has been given to communities of native cerrado plants that tolerate acid soil conditions, such as the species Anacardium othonianum Rizz., fruit plant and popularly known as the tree cashew of the cerrado, with many food, nutritional and medicinal applications. Thus, the aim of this study was to evaluate the effects of aluminum on root growth, nutrient accumulation and root structure of seedlings of A. othonianum Rizz. The germinated seedlings were growth in a nutrient solution only composed of 0,1 mM CaCl2.2H2O, and also in a complete low ionic strength solution, both with concentrations of aluminum (0, 150, 300, 600 and 1200 ?M) nutrient solution. Subsequently, the seedlings were evaluated for root growth, root elongation, dry mass and anatomical studies using techniques of light and fluorescence microscopy field. Emergence percentage and speed index emergence seedlings using washed sand moistened with a solution of aluminum in different concentrations were also assessed. The results showed that aluminum caused a reduction in the rate of root growth and root elongation relative phytotoxicity being observed from 150 ?M Al in solution. Reduction in the rate of emergence rate, percentage of seedlings emergence and anatomical changes in root tips, particularly in meristematic regions was also observed being demonstrated stimulation of these cells with vacuolization and internalization of aluminum in different tissues. Aluminum decreased absorption of most nutrients in the seedlings, with the following order of reduction in roots: P> Ca> Mg> N for macronutrients and Fe> Cu for micronutrients; reduction in leaves followed the order: Ca> Mg> P. On the other hand, higher concentrations of aluminum increased N and K content in leaves and Mn in roots. The K content in roots, and Fe, Cu and Mn in leaves were not affected by concentrations of aluminum. The results showed that this species tolerates high concentrations of aluminum, but the fall in rates of root growth and nutrient content can reduced the production of nut and pseudofruit in acid soils with high concentrations of this element, since the reduction in root growth makes plant operates less volume of soil, which in turn affects water and nutrient absorption.A avalia??o da toxidez causada pelo alum?nio em plantas das regi?es brasileiras do cerrado ? de grande import?ncia para o desenvolvimento da agricultura. Isso porque nessas ?reas predominam os latossolos, que s?o ?cidos, com baixa capacidade de troca cati?nica, alta satura??o por alum?nio troc?vel e teores muito baixos de f?sforo dispon?vel ?s plantas. Pouca aten??o tem sido dada ?s comunidades de plantas nativas do cerrado que toleram condi??es de solo ?cido. A esp?cie Anacardium othonianum Rizz., ? uma planta frut?fera e conhecida popularmente como caju-de-?rvore-do-cerrado, com v?rias aplica??es aliment?cias, nutricionais e medicinais, mas pouco estudada. Dessa forma, o objetivo deste estudo foi avaliar o efeito do alum?nio no crescimento radicular, ac?mulo de nutrientes e na estrutura anat?mica das ra?zes de pl?ntulas de A. othonianum Rizz. Para isso, pl?ntulas rec?m germinadas foram cultivadas em solu??o nutritiva simples, composta de 0,1 mM de CaCl2.2H2O, ou solu??o nutritiva completa com baixa for?a i?nica, ambas com cinco concentra??es de alum?nio (0, 150, 300, 600 e 1200 ?M). Posteriormente, as pl?ntulas foram avaliadas quanto ao crescimento radicular, elonga??o radicular, massa seca, al?m de estudos anat?micos utilizando t?cnicas de microscopia de campo claro e fluoresc?ncia. Tamb?m foram avaliadas a porcentagem de emerg?ncia e ?ndice de velocidade de emerg?ncia das pl?ntulas utilizando areia lavada umedecida com solu??o de alum?nio em diferentes concentra??es. Os resultados demonstraram que o alum?nio provocou redu??o nas taxas de crescimento radicular e elonga??o radicular relativa, sendo constatado fitotoxidez a partir de 150 ?M de Al na solu??o. Tamb?m foi observado redu??o no ?ndice de velocidade de emerg?ncia, porcentagem de emerg?ncia das pl?ntulas e altera??es anat?micas nos ?pices radiculares, em especial nas regi?es meristem?ticas, sendo demonstrado estimulo ? vacuoliza??o dessas c?lulas e interioriza??o do alum?nio em diferentes tecidos. O alum?nio diminuiu a absor??o da maioria dos nutrientes nas pl?ntulas, tendo a seguinte ordem de redu??o nas ra?zes: P>Ca>Mg>N para os macronutrientes e Fe>Cu para os micronutrientes; nas folhas a redu??o seguiu a ordem: Ca>Mg>P. Por outro lado, as maiores concentra??es de alum?nio aumentaram os teores de N e K nas folhas e Mn nas ra?zes. Os teores de K nas ra?zes, e Fe, Cu e Mn nas folhas, n?o foram afetados pelas concentra??es de alum?nio. Os resultados demonstraram que a esp?cie tolera altas concentra??es de alum?nio, por?m a queda nas taxas de crescimento radicular e nos teores de nutrientes podem prejudicar a produ??o de castanha e pseudofruto em solos ?cidos com altas concentra??es desse elemento, uma vez que a redu??o no crescimento radicular faz com que a planta explore menos volume de solo, o que consequentemente afeta a absor??o de ?gua e nutrientes.Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-10-26T11:25:33Z No. of bitstreams: 1 2014 - Sebasti?o Carvalho Vasconcelos Filho.pdf: 2634728 bytes, checksum: 247486cc8bad3c42694193f806019134 (MD5)Made available in DSpace on 2020-10-26T11:25:33Z (GMT). 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dc.title.por.fl_str_mv Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
dc.title.alternative.eng.fl_str_mv Aluminum toxicity in the tree cashew of the cerrado (Anacardium othonianum Rizz.).
title Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
spellingShingle Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
Vasconcelos Filho, Sebastiao Carvalho
crescimento
fitotoxidez
caju do cerrado
growth
phytotoxicity
cashew cerrado
Agronomia
title_short Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
title_full Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
title_fullStr Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
title_full_unstemmed Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
title_sort Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.)
author Vasconcelos Filho, Sebastiao Carvalho
author_facet Vasconcelos Filho, Sebastiao Carvalho
author_role author
dc.contributor.advisor1.fl_str_mv Jacob Neto, Jorge
dc.contributor.advisor1ID.fl_str_mv 088505851-08
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/6508017274417976
dc.contributor.referee1.fl_str_mv Silva, Fabiano Guimar?es
dc.contributor.referee2.fl_str_mv Alves, Jos? Milton
dc.contributor.referee3.fl_str_mv Goi, Silvia Regina
dc.contributor.referee4.fl_str_mv Vasconcellos, Marco Ant?nio da Silva
dc.contributor.authorID.fl_str_mv 004225241-58
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/8676132636864862
dc.contributor.author.fl_str_mv Vasconcelos Filho, Sebastiao Carvalho
contributor_str_mv Jacob Neto, Jorge
Silva, Fabiano Guimar?es
Alves, Jos? Milton
Goi, Silvia Regina
Vasconcellos, Marco Ant?nio da Silva
dc.subject.por.fl_str_mv crescimento
fitotoxidez
caju do cerrado
topic crescimento
fitotoxidez
caju do cerrado
growth
phytotoxicity
cashew cerrado
Agronomia
dc.subject.eng.fl_str_mv growth
phytotoxicity
cashew cerrado
dc.subject.cnpq.fl_str_mv Agronomia
description The evaluation of the toxicity caused by aluminum plants in the Brazilian cerrado regions has great importance for the development of agriculture, because these areas are dominated by oxisols, which are acid soils with low cation exchange capacity, high exchangeable aluminum saturation and very low phosphorus available to plants. Little attention has been given to communities of native cerrado plants that tolerate acid soil conditions, such as the species Anacardium othonianum Rizz., fruit plant and popularly known as the tree cashew of the cerrado, with many food, nutritional and medicinal applications. Thus, the aim of this study was to evaluate the effects of aluminum on root growth, nutrient accumulation and root structure of seedlings of A. othonianum Rizz. The germinated seedlings were growth in a nutrient solution only composed of 0,1 mM CaCl2.2H2O, and also in a complete low ionic strength solution, both with concentrations of aluminum (0, 150, 300, 600 and 1200 ?M) nutrient solution. Subsequently, the seedlings were evaluated for root growth, root elongation, dry mass and anatomical studies using techniques of light and fluorescence microscopy field. Emergence percentage and speed index emergence seedlings using washed sand moistened with a solution of aluminum in different concentrations were also assessed. The results showed that aluminum caused a reduction in the rate of root growth and root elongation relative phytotoxicity being observed from 150 ?M Al in solution. Reduction in the rate of emergence rate, percentage of seedlings emergence and anatomical changes in root tips, particularly in meristematic regions was also observed being demonstrated stimulation of these cells with vacuolization and internalization of aluminum in different tissues. Aluminum decreased absorption of most nutrients in the seedlings, with the following order of reduction in roots: P> Ca> Mg> N for macronutrients and Fe> Cu for micronutrients; reduction in leaves followed the order: Ca> Mg> P. On the other hand, higher concentrations of aluminum increased N and K content in leaves and Mn in roots. The K content in roots, and Fe, Cu and Mn in leaves were not affected by concentrations of aluminum. The results showed that this species tolerates high concentrations of aluminum, but the fall in rates of root growth and nutrient content can reduced the production of nut and pseudofruit in acid soils with high concentrations of this element, since the reduction in root growth makes plant operates less volume of soil, which in turn affects water and nutrient absorption.
publishDate 2014
dc.date.issued.fl_str_mv 2014-07-25
dc.date.accessioned.fl_str_mv 2020-10-26T11:25:33Z
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 Vasconcelos Filho, Sebastiao Carvalho. Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.). 2014. [66 f.]. Tese( Programa de P?s-Gradua??o em Fitotecnia) - Universidade Federal Rural do Rio de Janeiro, [Serop?dica - RJ] .
dc.identifier.uri.fl_str_mv https://tede.ufrrj.br/jspui/handle/jspui/4082
identifier_str_mv Vasconcelos Filho, Sebastiao Carvalho. Toxidez do alum?nio em caju-de-?rvore-do-cerrado (Anacardium othonianum Rizz.). 2014. [66 f.]. Tese( Programa de P?s-Gradua??o em Fitotecnia) - Universidade Federal Rural do Rio de Janeiro, [Serop?dica - RJ] .
url https://tede.ufrrj.br/jspui/handle/jspui/4082
dc.language.iso.fl_str_mv por
language por
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