| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
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| País: |
Brazil
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| Título: |
Phloem mobility of Boron in two eucalypt clones
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| Autores: |
Mattiello,Edson Marcio
Ruiz,Hugo Alberto
Silva,Ivo Ribeiro da
Sarkis,Jorge Eduardo Souza
Neves,Júlio César Lima
Pucci,Murilo Marques
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| Data: |
2009-12-01
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| Ano: |
2009
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| Palavras-chave: |
B translocation
Nutritional deficiency
Boron isotope
10B:11B ratio
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| Resumo: |
Boron deficiency causes large productivity losses in eucalypt stands in extensive areas of the Brazilian Cerrado region, thus understanding B mobility is a key step in selecting genetic materials that will better withstand B limitation. Thus, in this study B mobility was evaluated in two eucalypt clones (68 and 129), under B sufficiency or B deficiency, after foliar application of the 10B isotope tracer to a single mature leaf. Samples of young tissue, mature leaves and roots were collected 0, 1, 5, 12 and 17 days after 10B application. The 10B:11B isotope ratio was determined by HR-ICP-MS. Samples of leaves and xylem sap were collected for the determination of soluble sugars and polyalcohols by ion chromatography. Boron was translocated within eucalypt. Translocation of foliar-applied 10B to the young tissues, mature leaves and roots was higher in clone 129 than in 68. Seventeen days after 10B application to a single mature leaf, between 14 and 18 % of B in the young tissue was originated from foliar B application. In plants with adequate B supply the element was not translocated out of the labeled leaf.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600018
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| Editor: |
Sociedade Brasileira de Ciência do Solo
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| Relação: |
10.1590/S0100-06832009000600018
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Ciência do Solo v.33 n.6 2009
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| Direitos: |
info:eu-repo/semantics/openAccess
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