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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
19/06/2000 |
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Data da última atualização: |
19/06/2000 |
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Autoria: |
PAVAN, M. A. |
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Título: |
Manganese and nickel toxicity in coffee (Coffea arabica, L.). |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Riverside: University of California, 1979. |
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Páginas: |
55p. |
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Idioma: |
Inglês |
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Conteúdo: |
Sand cultures with different amounts of Mn and Ni alone and in combination were used to characterize toxicities of Mn and Ni with coffee plants. The third pair of leaves was found to reflect closest the mineral nutrition status of the plant. Manganese and Ni uptake were proportional to the supply and plant injury was proportional to Mn and Ni uptake. Nickel toxicity: growth decrease upon adding Ni to the solution culture at rates of 0.0, 0.5 and 1.0 mg/g. The reduced growth was associated with leaf Ni values of 30 to 75 ug/g. Excess Ni in solution also increased the the concentration of Mn and Fe in the leaf while leaf chlorophyll decreased. Symptoms of Ni toxicity were chlorosis and necrotic spots on younger leaves. Manganese toxicity: plant growth and dry weight were at a maximum for solution culture levels of 2.5 and 5.0 mg Mn/1 which were associated with leaf Mn over a range of 600 to 1,200 ug/g. Leaf Mn values for coffee seedlings growing in nutrient solution containing 20 mg Mn/1 ranged from 2,500 to 2,800 ug Mn/g and were associated with a 30% reduction in growth. Yields were at a maximum when the Mn/Fe ratio in leaf tissue was 7.64 and decreased to 30% of the maximum as this ratio was increased to 18. Excess of Mn in solution decreased the concentration of Fe and Ca in leaf tissue. Total leaf chlorophyll increased at a maximum when the leaf Mn was at 600 ug/g and decreased as leaf a Mn increased. Leaf Mn concentrations of 1,200 and 2,600 ug/g were associated with medium and very severe leaf toxicity. Symptoms of Mn toxicity were marginal chlorosis and few necrotic spots on younger leaves. The combination of Mn and Ni produced in addition to the symptoms described, small internodes, streak necrosis of the leaf, petiole, and branch, defoliation, and dieback. MenosSand cultures with different amounts of Mn and Ni alone and in combination were used to characterize toxicities of Mn and Ni with coffee plants. The third pair of leaves was found to reflect closest the mineral nutrition status of the plant. Manganese and Ni uptake were proportional to the supply and plant injury was proportional to Mn and Ni uptake. Nickel toxicity: growth decrease upon adding Ni to the solution culture at rates of 0.0, 0.5 and 1.0 mg/g. The reduced growth was associated with leaf Ni values of 30 to 75 ug/g. Excess Ni in solution also increased the the concentration of Mn and Fe in the leaf while leaf chlorophyll decreased. Symptoms of Ni toxicity were chlorosis and necrotic spots on younger leaves. Manganese toxicity: plant growth and dry weight were at a maximum for solution culture levels of 2.5 and 5.0 mg Mn/1 which were associated with leaf Mn over a range of 600 to 1,200 ug/g. Leaf Mn values for coffee seedlings growing in nutrient solution containing 20 mg Mn/1 ranged from 2,500 to 2,800 ug Mn/g and were associated with a 30% reduction in growth. Yields were at a maximum when the Mn/Fe ratio in leaf tissue was 7.64 and decreased to 30% of the maximum as this ratio was increased to 18. Excess of Mn in solution decreased the concentration of Fe and Ca in leaf tissue. Total leaf chlorophyll increased at a maximum when the leaf Mn was at 600 ug/g and decreased as leaf a Mn increased. Leaf Mn concentrations of 1,200 and 2,600 ug/g were associated with me... Mostrar Tudo |
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Palavras-Chave: |
Coffee; Toxicidez. |
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Thesagro: |
Café; Coffea Arábica; Manganês; Níquel; Nutrição Vegetal. |
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Thesaurus Nal: |
manganese; nickel; plant nutrition; toxicity. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02414nam a2200253 a 4500
001 1560006
005 2000-06-19
008 1979 bl uuuu m 00u1 u #d
100 1 $aPAVAN, M. A.
245 $aManganese and nickel toxicity in coffee (Coffea arabica, L.).
260 $aRiverside: University of California$c1979
300 $a55p.
520 $aSand cultures with different amounts of Mn and Ni alone and in combination were used to characterize toxicities of Mn and Ni with coffee plants. The third pair of leaves was found to reflect closest the mineral nutrition status of the plant. Manganese and Ni uptake were proportional to the supply and plant injury was proportional to Mn and Ni uptake. Nickel toxicity: growth decrease upon adding Ni to the solution culture at rates of 0.0, 0.5 and 1.0 mg/g. The reduced growth was associated with leaf Ni values of 30 to 75 ug/g. Excess Ni in solution also increased the the concentration of Mn and Fe in the leaf while leaf chlorophyll decreased. Symptoms of Ni toxicity were chlorosis and necrotic spots on younger leaves. Manganese toxicity: plant growth and dry weight were at a maximum for solution culture levels of 2.5 and 5.0 mg Mn/1 which were associated with leaf Mn over a range of 600 to 1,200 ug/g. Leaf Mn values for coffee seedlings growing in nutrient solution containing 20 mg Mn/1 ranged from 2,500 to 2,800 ug Mn/g and were associated with a 30% reduction in growth. Yields were at a maximum when the Mn/Fe ratio in leaf tissue was 7.64 and decreased to 30% of the maximum as this ratio was increased to 18. Excess of Mn in solution decreased the concentration of Fe and Ca in leaf tissue. Total leaf chlorophyll increased at a maximum when the leaf Mn was at 600 ug/g and decreased as leaf a Mn increased. Leaf Mn concentrations of 1,200 and 2,600 ug/g were associated with medium and very severe leaf toxicity. Symptoms of Mn toxicity were marginal chlorosis and few necrotic spots on younger leaves. The combination of Mn and Ni produced in addition to the symptoms described, small internodes, streak necrosis of the leaf, petiole, and branch, defoliation, and dieback.
650 $amanganese
650 $anickel
650 $aplant nutrition
650 $atoxicity
650 $aCafé
650 $aCoffea Arábica
650 $aManganês
650 $aNíquel
650 $aNutrição Vegetal
653 $aCoffee
653 $aToxicidez
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Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
25/03/2009 |
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Data da última atualização: |
08/05/2024 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FARIA, D. A.; NEVES, L. G.; CORREIA, L. Q.; MAMANI, E. M. C.; GRATTAPAGLIA, D. |
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Afiliação: |
DANIELLE ASSIS DE FARIA; LEANDRO GOMIDE NEVES; LEONARDO QUEIROZ CORREIA; E. M. C. MAMANI, UNB; DÁRIO GRATTAPAGLIA, EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA. |
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Título: |
Mapeamento de QTLs para qualidade da madeira em uma população segregante envolvendo quatro espécies de Eucalyptus. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. Resumo 143. |
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Páginas: |
p. 193. |
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Idioma: |
Português |
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Palavras-Chave: |
Mapeamento. |
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Thesagro: |
Madeira; Melhoramento. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00754nam a2200193 a 4500
001 1191119
005 2024-05-08
008 2008 bl uuuu u01u1 u #d
100 1 $aFARIA, D. A.
245 $aMapeamento de QTLs para qualidade da madeira em uma população segregante envolvendo quatro espécies de Eucalyptus.
260 $aIn: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. Resumo 143.$c2008
300 $ap. 193.
650 $aMadeira
650 $aMelhoramento
653 $aMapeamento
700 1 $aNEVES, L. G.
700 1 $aCORREIA, L. Q.
700 1 $aMAMANI, E. M. C.
700 1 $aGRATTAPAGLIA, D.
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