Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/17119 |
Resumo: | Coffee seedlings (Coffea arabica L.) cv. "Catuaí vermelho” were grown in sand culture with different amounts of Mn. The objective was to determine and characterize toxicities of this metal. Mn uptake was proportional to the supply and plant injuries were proportional to Mn uptake. The regression equation for leaf Mn (Y = µ g Mn/g) as related to solution Mn (mg Mn/l) was: Y = 352.59 + 132.59 (sol. Mn) (R = 0.965***). Twenty-five percent of the yield decrement was associated with solution Mn of 20 mg Mn/l or leaf Mn ranged from 2,500 to 2,800 µg Mn/g. The regression equation for plant dry weight (Y = g/plants) as related to leaf Mn (µg Mn/g) was: Y = 213.41 - 0.022 (leaf Mn) (R = 0.613*). Maximum yields were associated with Mn/Fe ratio in leaf tissue of 7.64 and decrease to 25% to the maximum as this ratio was increased to 18. Excess of Mn in solution decreased leaf Fe and Ca but did not affect leaf B, Zn, Mg and total N. Total leaf chlorophyll increased to a maximum concentration of 2.6 mg/g fresh tissue when leaf Mn was 608 µg/g and steadily decreased to 1.85 mg/g as the leaf Mn was increased to 2,580 µg/g. Leaf Mn concentrations of 1,200 and 2,600 µg Mn/g were associated with medium and very severe leaf toxicity symptoms respectively. Manganese toxicity symptoms were marginal chlorosis and few necrotic spots on younger leaves. |
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Toxicity of metals in plants. I. Characterization of manganese toxicity in coffeeToxidez de metais em plantas. I. Caracterização de toxidez de manganês em cafeeirosCoffea arabica L.; plant nutritionCoffea arabica L.; nutrição de plantasCoffee seedlings (Coffea arabica L.) cv. "Catuaí vermelho” were grown in sand culture with different amounts of Mn. The objective was to determine and characterize toxicities of this metal. Mn uptake was proportional to the supply and plant injuries were proportional to Mn uptake. The regression equation for leaf Mn (Y = µ g Mn/g) as related to solution Mn (mg Mn/l) was: Y = 352.59 + 132.59 (sol. Mn) (R = 0.965***). Twenty-five percent of the yield decrement was associated with solution Mn of 20 mg Mn/l or leaf Mn ranged from 2,500 to 2,800 µg Mn/g. The regression equation for plant dry weight (Y = g/plants) as related to leaf Mn (µg Mn/g) was: Y = 213.41 - 0.022 (leaf Mn) (R = 0.613*). Maximum yields were associated with Mn/Fe ratio in leaf tissue of 7.64 and decrease to 25% to the maximum as this ratio was increased to 18. Excess of Mn in solution decreased leaf Fe and Ca but did not affect leaf B, Zn, Mg and total N. Total leaf chlorophyll increased to a maximum concentration of 2.6 mg/g fresh tissue when leaf Mn was 608 µg/g and steadily decreased to 1.85 mg/g as the leaf Mn was increased to 2,580 µg/g. Leaf Mn concentrations of 1,200 and 2,600 µg Mn/g were associated with medium and very severe leaf toxicity symptoms respectively. Manganese toxicity symptoms were marginal chlorosis and few necrotic spots on younger leaves.Plântulas de cafeeiro (Coffea arabica L.) cv. Catuaí Vermelho, brotadas em caixas de areia, foram usadas, no presente trabalho, com o objetivo de se determinar e caracterizar a toxidez do Mn nos cafeeiros. A absorção de Mn foi proporcional à quantidade de Mn adicionado na solução, e as injúrias nas plantas foram proporcionais à absorção de Mn. A equação de regressão para o Mn nas folhas (Y = µg/g de Mn), quando correlacionada com a solução (mg/l de Mn), foi: Y = 352,59 + 132,59 (Mn sol.) (R = 0,965***). A concentração, nas folhas, de solução contendo 20 mg/l de Mn variou de 2.500 a 2.800 µg/g de Mn e foi associada com os 25% da diminuição de crescimento das plantas. A equação de regressão para peso seco (Y = g/planta), quando correlacionada com o Mn das folhas (µg/g de Mn), foi: Y = 213,41 - 0,022 (Mn foliar) (R = 0,613*). O máximo desenvolvimento da planta foi associado com a relação Mn/Fe, nas folhas, de 7,64, e decresceu para 25% do máximo quando a relação aumentou para 18. O excesso de Mn na solução diminuiu a absorção de Fe e Ca, mas não afetou o B, Zn, Mg e N - total nas folhas. A clorofila nas folhas aumentou para o máximo de concentração de 2,6 mg por g de tecido fresco quando o Mn foliar aumentou para 2.580 µg/g. Concentrações de Mn foliar de 1.200 e 2.600 µg/g foram correlacionadas com sintomas de toxidez "médio" e "muito severo", respectivamente. Os sintomas de toxidez de Mn foram notados nas folhas mais jovens, pela clorose marginal e por alguns pontos necróticos que apareceram no limbo.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPavan, Marcos A.Bingham, Frank T.2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/17119Pesquisa Agropecuaria Brasileira; v.16, n.6, jun. 1981; 815-821Pesquisa Agropecuária Brasileira; v.16, n.6, jun. 1981; 815-8211678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/17119/11446info:eu-repo/semantics/openAccess2014-04-15T19:45:00Zoai:ojs.seer.sct.embrapa.br:article/17119Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T19:45Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee Toxidez de metais em plantas. I. Caracterização de toxidez de manganês em cafeeiros |
title |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee |
spellingShingle |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee Pavan, Marcos A. Coffea arabica L.; plant nutrition Coffea arabica L.; nutrição de plantas |
title_short |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee |
title_full |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee |
title_fullStr |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee |
title_full_unstemmed |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee |
title_sort |
Toxicity of metals in plants. I. Characterization of manganese toxicity in coffee |
author |
Pavan, Marcos A. |
author_facet |
Pavan, Marcos A. Bingham, Frank T. |
author_role |
author |
author2 |
Bingham, Frank T. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Pavan, Marcos A. Bingham, Frank T. |
dc.subject.por.fl_str_mv |
Coffea arabica L.; plant nutrition Coffea arabica L.; nutrição de plantas |
topic |
Coffea arabica L.; plant nutrition Coffea arabica L.; nutrição de plantas |
description |
Coffee seedlings (Coffea arabica L.) cv. "Catuaí vermelho” were grown in sand culture with different amounts of Mn. The objective was to determine and characterize toxicities of this metal. Mn uptake was proportional to the supply and plant injuries were proportional to Mn uptake. The regression equation for leaf Mn (Y = µ g Mn/g) as related to solution Mn (mg Mn/l) was: Y = 352.59 + 132.59 (sol. Mn) (R = 0.965***). Twenty-five percent of the yield decrement was associated with solution Mn of 20 mg Mn/l or leaf Mn ranged from 2,500 to 2,800 µg Mn/g. The regression equation for plant dry weight (Y = g/plants) as related to leaf Mn (µg Mn/g) was: Y = 213.41 - 0.022 (leaf Mn) (R = 0.613*). Maximum yields were associated with Mn/Fe ratio in leaf tissue of 7.64 and decrease to 25% to the maximum as this ratio was increased to 18. Excess of Mn in solution decreased leaf Fe and Ca but did not affect leaf B, Zn, Mg and total N. Total leaf chlorophyll increased to a maximum concentration of 2.6 mg/g fresh tissue when leaf Mn was 608 µg/g and steadily decreased to 1.85 mg/g as the leaf Mn was increased to 2,580 µg/g. Leaf Mn concentrations of 1,200 and 2,600 µg Mn/g were associated with medium and very severe leaf toxicity symptoms respectively. Manganese toxicity symptoms were marginal chlorosis and few necrotic spots on younger leaves. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-15 |
dc.type.none.fl_str_mv |
|
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://seer.sct.embrapa.br/index.php/pab/article/view/17119 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/17119 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/17119/11446 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.16, n.6, jun. 1981; 815-821 Pesquisa Agropecuária Brasileira; v.16, n.6, jun. 1981; 815-821 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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