| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agropecuária Oeste; Embrapa Cerrados. |
|
Data corrente: |
15/08/1996 |
|
Data da última atualização: |
10/09/1997 |
|
Autoria: |
ANDRADE, L. R. M. de. |
|
Título: |
Physiological studies on varietal differences in aluminum tolerance in wheat. |
|
Ano de publicação: |
1996 |
|
Fonte/Imprenta: |
[Fukuoka, Japan]: [Kyushu University], 1996. |
|
Páginas: |
131p. |
|
Idioma: |
Inglês |
|
Notas: |
[Tese Doutorado]. |
|
Conteúdo: |
Differential Al-tolerance in plants, particularly wheat varieties has been extensively studied, but the mechanisms of Al toxicity and tolerance are still not well understood. The objective of this work was to investigate the mechanisms of Al-tolerance in wheat varieties screened for Al-tolerance by the hematoxylin staining method, with emphasis on a) the formation of a plant-induced pH barrier in the rhizosphere and b) the exudation of chelator ligands. A second objective was to clarify the effect of Al on the metabolism of malate in roots leading to its excretion using 14C tracer technique. Selected six wheat varieties differing in Al tolerance were used to determine the combined effects of Al and N sources on solution pH changes and nutrient absorption by plants. NO3- uptake was severely inhibited by the presence of Al while NH4+ uptake was little affected. Al decreased the amounts of Ca, Mg, and K accumulated in whole plants independent of N sources. The changes in the solution pH were a consequence of general effect of Al on nutrient uptake, msinly N (NH4+ and N03-), and they were not directly correlated with the scoring of Al-tolerance. Plants grown in N03--N accumulated more Al in the roots and it might be related to solution pH-changes. Tolerant varieties accumulated less Al. It was concluded the differential Al-tolerance among those varieties could not be explained solely by the ability of plants to maintain a high solution pH in mixed N solutions. The root apex (root cap, meristem, and root elongation ... MenosDifferential Al-tolerance in plants, particularly wheat varieties has been extensively studied, but the mechanisms of Al toxicity and tolerance are still not well understood. The objective of this work was to investigate the mechanisms of Al-tolerance in wheat varieties screened for Al-tolerance by the hematoxylin staining method, with emphasis on a) the formation of a plant-induced pH barrier in the rhizosphere and b) the exudation of chelator ligands. A second objective was to clarify the effect of Al on the metabolism of malate in roots leading to its excretion using 14C tracer technique. Selected six wheat varieties differing in Al tolerance were used to determine the combined effects of Al and N sources on solution pH changes and nutrient absorption by plants. NO3- uptake was severely inhibited by the presence of Al while NH4+ uptake was little affected. Al decreased the amounts of Ca, Mg, and K accumulated in whole plants independent of N sources. The changes in the solution pH were a consequence of general effect of Al on nutrient uptake, msinly N (NH4+ and N03-), and they were not directly correlated with the scoring of Al-tolerance. Plants grown in N03--N accumulated more Al in the roots and it might be related to solution pH-changes. Tolerant varieties accumulated less Al. It was concluded the differential Al-tolerance among those varieties could not be explained solely by the ability of plants to maintain a high solution pH in mixed N solutions. The root apex (roo... Mostrar Tudo |
|
Palavras-Chave: |
Aluminium; Diferenca varietal; Difference; Malato; Mecanismo; Mechanism; Organic acids; Plant soil relations; Soil deficiencies; Soil toxity; Tolerance; Tolerancia; Toxicidade. |
|
Thesagro: |
Ácido Orgânico; Alumínio; Fisiologia Vegetal; Raiz; Relação Solo-Planta; Rizosfera; Toxidez; Trigo; Triticum Aestivum; Variedade. |
|
Thesaurus Nal: |
aluminum; malates; plant physiology; rhizosphere; roots; toxicity; varieties; wheat. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02787nam a2200505 a 4500
001 1557073
005 1997-09-10
008 1996 bl uuuu m 00u1 u #d
100 1 $aANDRADE, L. R. M. de
245 $aPhysiological studies on varietal differences in aluminum tolerance in wheat.
260 $a[Fukuoka, Japan]: [Kyushu University]$c1996
300 $a131p.
500 $a[Tese Doutorado].
520 $aDifferential Al-tolerance in plants, particularly wheat varieties has been extensively studied, but the mechanisms of Al toxicity and tolerance are still not well understood. The objective of this work was to investigate the mechanisms of Al-tolerance in wheat varieties screened for Al-tolerance by the hematoxylin staining method, with emphasis on a) the formation of a plant-induced pH barrier in the rhizosphere and b) the exudation of chelator ligands. A second objective was to clarify the effect of Al on the metabolism of malate in roots leading to its excretion using 14C tracer technique. Selected six wheat varieties differing in Al tolerance were used to determine the combined effects of Al and N sources on solution pH changes and nutrient absorption by plants. NO3- uptake was severely inhibited by the presence of Al while NH4+ uptake was little affected. Al decreased the amounts of Ca, Mg, and K accumulated in whole plants independent of N sources. The changes in the solution pH were a consequence of general effect of Al on nutrient uptake, msinly N (NH4+ and N03-), and they were not directly correlated with the scoring of Al-tolerance. Plants grown in N03--N accumulated more Al in the roots and it might be related to solution pH-changes. Tolerant varieties accumulated less Al. It was concluded the differential Al-tolerance among those varieties could not be explained solely by the ability of plants to maintain a high solution pH in mixed N solutions. The root apex (root cap, meristem, and root elongation ...
650 $aaluminum
650 $amalates
650 $aplant physiology
650 $arhizosphere
650 $aroots
650 $atoxicity
650 $avarieties
650 $awheat
650 $aÁcido Orgânico
650 $aAlumínio
650 $aFisiologia Vegetal
650 $aRaiz
650 $aRelação Solo-Planta
650 $aRizosfera
650 $aToxidez
650 $aTrigo
650 $aTriticum Aestivum
650 $aVariedade
653 $aAluminium
653 $aDiferenca varietal
653 $aDifference
653 $aMalato
653 $aMecanismo
653 $aMechanism
653 $aOrganic acids
653 $aPlant soil relations
653 $aSoil deficiencies
653 $aSoil toxity
653 $aTolerance
653 $aTolerancia
653 $aToxicidade
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
|
Data corrente: |
29/03/2010 |
|
Data da última atualização: |
06/04/2022 |
|
Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
|
Autoria: |
ANJOS, J. L. dos; SOBRAL, L. F.; CARVALHO, H. W. L. de; OLIVEIRA, I. R. de; CARVALHO, B. C. de. |
|
Afiliação: |
JOEZIO LUIZ DOS ANJOS, CPATC; LAFAYETTE FRANCO SOBRAL, CPATC; HELIO WILSON LEMOS DE CARVALHO, CPATC; IVENIO RUBENS DE OLIVEIRA, CPATC; BENEDITO CARLOS DE CARVALHO. |
|
Título: |
Nitrogênio e fósforo na produção de girassol em solos dos tabuleiros costeiros. |
|
Ano de publicação: |
2009 |
|
Fonte/Imprenta: |
In: REUNIÃO NACIONAL DE PESQUISA DO GIRASSOL, 18., SIMPÓSIO NACIONAL SOBRE A CULTURA DO GIRASSOL, 6., 2009. Pelotas. Anais... Pelotas: Embrapa Clima Temperado, 2009. 388 p. Editado por Ana Claudia Barneche de Oliveira, Ana Paula Afonso Scheneid da Rosa e Márcia Vizzotto. |
|
Páginas: |
p. 149-153. |
|
Descrição Física: |
Artigo em anais. |
|
Idioma: |
Português |
|
Palavras-Chave: |
Tabuleiros costeiros. |
|
Thesagro: |
Girassol; Solo. |
|
Categoria do assunto: |
-- |
|
URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/662640/1/Nitrogenio-e-fosforo0001.pdf
|
|
Marc: |
LEADER 00842nam a2200193 a 4500
001 1662640
005 2022-04-06
008 2009 bl uuuu u00u1 u #d
100 1 $aANJOS, J. L. dos
245 $aNitrogênio e fósforo na produção de girassol em solos dos tabuleiros costeiros.$h[electronic resource]
260 $aIn: REUNIÃO NACIONAL DE PESQUISA DO GIRASSOL, 18., SIMPÓSIO NACIONAL SOBRE A CULTURA DO GIRASSOL, 6., 2009. Pelotas. Anais... Pelotas: Embrapa Clima Temperado, 2009. 388 p. Editado por Ana Claudia Barneche de Oliveira, Ana Paula Afonso Scheneid da Rosa e Márcia Vizzotto.$c2009
300 $ap. 149-153.$cArtigo em anais.
650 $aGirassol
650 $aSolo
653 $aTabuleiros costeiros
700 1 $aSOBRAL, L. F.
700 1 $aCARVALHO, H. W. L. de
700 1 $aOLIVEIRA, I. R. de
700 1 $aCARVALHO, B. C. de
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Tabuleiros Costeiros (CPATC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
