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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
02/03/1999 |
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Data da última atualização: |
02/03/1999 |
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Autoria: |
SMITH, B. N. |
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Afiliação: |
Department of Botany and Range Science. Brigham Young University, Provo, Utah, U.S.A. |
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Título: |
Iron in higher plants: storage and metabolic role. |
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Ano de publicação: |
1984 |
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Fonte/Imprenta: |
Journal of Plant Nutrition, v.7, n.1/5, p.759-766, 1984. |
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Idioma: |
Inglês |
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Conteúdo: |
Iron in the earth's crust is more oxidized now than it was when life envolved. Generrally iron is available in the soil in the ferric form but must be taken up and utilized in the ferrous form. While iron is essential for life in small amounts, higher concentrations are toxic. Plants store iron for future use as ferritin which is ferric phosphate coated with protein. The protein coat apparently prevents iron toxicity or use of stored iron by pathogens. Iron is found in both heme-proteins (cytochromes, catalase, etc.) and non-heme proteins (ferridoxins, nitrite reductase, etc.) These enzymes are characterized by involvement in oxidation-reduction reactions involving electron or proton transfer. One might say that life envolved around iron. |
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Palavras-Chave: |
Metabolico role; Papel metabolico; Plant. |
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Thesagro: |
Armazenamento; Ferro; Nutrição; Planta. |
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Thesaurus Nal: |
iron; nutrition; storage. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01337naa a2200241 a 4500
001 1793833
005 1999-03-02
008 1984 bl --- 0-- u #d
100 1 $aSMITH, B. N.
245 $aIron in higher plants$bstorage and metabolic role.
260 $c1984
520 $aIron in the earth's crust is more oxidized now than it was when life envolved. Generrally iron is available in the soil in the ferric form but must be taken up and utilized in the ferrous form. While iron is essential for life in small amounts, higher concentrations are toxic. Plants store iron for future use as ferritin which is ferric phosphate coated with protein. The protein coat apparently prevents iron toxicity or use of stored iron by pathogens. Iron is found in both heme-proteins (cytochromes, catalase, etc.) and non-heme proteins (ferridoxins, nitrite reductase, etc.) These enzymes are characterized by involvement in oxidation-reduction reactions involving electron or proton transfer. One might say that life envolved around iron.
650 $airon
650 $anutrition
650 $astorage
650 $aArmazenamento
650 $aFerro
650 $aNutrição
650 $aPlanta
653 $aMetabolico role
653 $aPapel metabolico
653 $aPlant
773 $tJournal of Plant Nutrition$gv.7, n.1/5, p.759-766, 1984.
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Registro original: |
Embrapa Pantanal (CPAP) |
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