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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
19/09/2001 |
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Data da última atualização: |
19/09/2001 |
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Autoria: |
RENGEL, Z. |
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Título: |
Zinc deficiency in wheat genotypes grown in conventional and chelator-buffered nutrient solutions. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Plant Sciences, Calcutta, v. 143, p. 221-230, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Chelator-buffered nutrient solutions have been used extensively in studying plant-micronutrient relationships, but the effects of the chelator on plants are poorly understood. This study compared responses to Zn deficiency of two wheat genotypes (Triticum aestivum, cv. Aroona, and T. turgidum L.conv. durum, cv.Durati) grown in conventional and chelator-buffered nutrient soluitons. With the same low activity of Zn2+ in both types of solution, shoot growth was impaired more and root exudation of phytosiderophores was greater in the chelator-buffered than in the conventional solution. Under Zn deficiency, Durati wheat (sensitive to Zn deficiency) suffered a greater level of inhibition of shoot growth and exuded less phytosiderophores from roots than Aroona wheat (tolerant to Zn deficiency). Under both Zn deficiency and Zn sufficiency, a greater concentration and content of Zn and Fe in the shoots and Cu in the roots were found in plants grown in the conventional rather than in the chelator-buffered solutions. In contrast, accumulation of Mn was greater in the roots of plants grown in the chelator-buffered than in the conventional solution. The rate of Zn and Fe transport to the shoots was greater in the plants grown in the chelator-buffered compared to the conventional solution. It is concluded that Zn deficiency is more severe in the chelator-buffered than in the conventional solution, even with the calculated Zn2+ activity being the same in both types of solution. |
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Palavras-Chave: |
Genotypes; Micronutriente; Micronutrients; Zu. |
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Thesagro: |
Trigo; Zinco. |
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Thesaurus Nal: |
nutrient deficiencies; trace elements; zinc. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02098naa a2200229 a 4500
001 1621203
005 2001-09-19
008 1999 bl --- 0-- u #d
100 1 $aRENGEL, Z.
245 $aZinc deficiency in wheat genotypes grown in conventional and chelator-buffered nutrient solutions.
260 $c1999
520 $aChelator-buffered nutrient solutions have been used extensively in studying plant-micronutrient relationships, but the effects of the chelator on plants are poorly understood. This study compared responses to Zn deficiency of two wheat genotypes (Triticum aestivum, cv. Aroona, and T. turgidum L.conv. durum, cv.Durati) grown in conventional and chelator-buffered nutrient soluitons. With the same low activity of Zn2+ in both types of solution, shoot growth was impaired more and root exudation of phytosiderophores was greater in the chelator-buffered than in the conventional solution. Under Zn deficiency, Durati wheat (sensitive to Zn deficiency) suffered a greater level of inhibition of shoot growth and exuded less phytosiderophores from roots than Aroona wheat (tolerant to Zn deficiency). Under both Zn deficiency and Zn sufficiency, a greater concentration and content of Zn and Fe in the shoots and Cu in the roots were found in plants grown in the conventional rather than in the chelator-buffered solutions. In contrast, accumulation of Mn was greater in the roots of plants grown in the chelator-buffered than in the conventional solution. The rate of Zn and Fe transport to the shoots was greater in the plants grown in the chelator-buffered compared to the conventional solution. It is concluded that Zn deficiency is more severe in the chelator-buffered than in the conventional solution, even with the calculated Zn2+ activity being the same in both types of solution.
650 $anutrient deficiencies
650 $atrace elements
650 $azinc
650 $aTrigo
650 $aZinco
653 $aGenotypes
653 $aMicronutriente
653 $aMicronutrients
653 $aZu
773 $tPlant Sciences, Calcutta$gv. 143, p. 221-230, 1999.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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