Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress

Detalhes bibliográficos
Autor(a) principal: Machado, Eduardo Caruso
Data de Publicação: 2014
Outros Autores: Pereira, Antonio Roberto
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/13508
Resumo: The effects of aluminum (AD on the conversion efficiency and maintenance respiration coefficient of whole structure planta and their organs, roots and tops, were studied in two rice cultivars (Oryza sativa L.), IAC- 165 (tolerant) and IAC-899 (sensitive), and two maize hybrids (Zea mays L.), HS1227 (tolerant) and HS7777 (sensitive), through the carbon balance technique. Under Al stress the sensitive cultivars had a reduction of approximately 20% in the gross photosynthesis production and growth rate; for the tolerant plants such parameters practically were not affected. Under Al stress, all cultivars, both sensitive and tolerant, had the plants, roots and tops' respirations reduced in comparison with the non stressed ones. The root conversion efficiency (YR), in all cultivars under Al stress, increased by 12% to 16%, while the top conversion efficiency (A) practically was not affected. The increase in YR was about the same, both for tolerant and non tolerant cultivars, and for such it was not possible to use it for screening plants. The maintenance respiration coefficient also showed no relationships with tolerance to Al toxicity.
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spelling Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stressEficiência de conversão e coeficiente de manutenção da planta inteira, das raízes e da parte aérea em milho e arroz submetidos ao estresse de alumíniocarbon balance; photosynthesis; plant respiration; aluminum tolerancebalanço de carbono; fotossíntese; respiração de plantas; tolerância ao Al.The effects of aluminum (AD on the conversion efficiency and maintenance respiration coefficient of whole structure planta and their organs, roots and tops, were studied in two rice cultivars (Oryza sativa L.), IAC- 165 (tolerant) and IAC-899 (sensitive), and two maize hybrids (Zea mays L.), HS1227 (tolerant) and HS7777 (sensitive), through the carbon balance technique. Under Al stress the sensitive cultivars had a reduction of approximately 20% in the gross photosynthesis production and growth rate; for the tolerant plants such parameters practically were not affected. Under Al stress, all cultivars, both sensitive and tolerant, had the plants, roots and tops' respirations reduced in comparison with the non stressed ones. The root conversion efficiency (YR), in all cultivars under Al stress, increased by 12% to 16%, while the top conversion efficiency (A) practically was not affected. The increase in YR was about the same, both for tolerant and non tolerant cultivars, and for such it was not possible to use it for screening plants. The maintenance respiration coefficient also showed no relationships with tolerance to Al toxicity.Determinou-se o efeito do alumínio (Al) sobre a eficiência de conversão e o coeficiente de manutenção da planta inteira, das raízes e da parte aérea, separadamente, em duas cultivares de arroz (Oryza sativa L.), IAC-165 (tolerante) e IAC-899 (sensível) e em dois híbridos de milho (Zea mays L.), HS1227 (tolerante) e HS7777 (sensível), através do balanço de carbono. Nas cultivares sensíveis o Al causou queda de 20% na produção fotossintética bruta, enquanto que nas tolerantes tal efeito foi desprezível. Sob estresse de Al, em todas cultivares a respiração da planta, das raízes e da parte aérea foram menores, em comparação às plantas sem estresse. A eficiência de conversão das raízes (R), em todas cultivares tratadas com Al, sofreu acréscimos entre 12 e 16%, enquanto que a eficiência de conversão da parte aérea (A) não foi afetada. Não se obteve evidências para relacionar YR , YA e o coeficiente de manutenção com tolerância ao Al.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraMachado, Eduardo CarusoPereira, Antonio Roberto2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/13508Pesquisa Agropecuaria Brasileira; v.25, n.6, jun. 1990; 845-855Pesquisa Agropecuária Brasileira; v.25, n.6, jun. 1990; 845-8551678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/13508/7673info:eu-repo/semantics/openAccess2014-04-17T14:34:39Zoai:ojs.seer.sct.embrapa.br:article/13508Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-17T14:34:39Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
Eficiência de conversão e coeficiente de manutenção da planta inteira, das raízes e da parte aérea em milho e arroz submetidos ao estresse de alumínio
title Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
spellingShingle Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
Machado, Eduardo Caruso
carbon balance; photosynthesis; plant respiration; aluminum tolerance
balanço de carbono; fotossíntese; respiração de plantas; tolerância ao Al.
title_short Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
title_full Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
title_fullStr Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
title_full_unstemmed Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
title_sort Conversion efficiency and maintenance coefficient in the whole plant, roots and tops in maize and rice under aluminum stress
author Machado, Eduardo Caruso
author_facet Machado, Eduardo Caruso
Pereira, Antonio Roberto
author_role author
author2 Pereira, Antonio Roberto
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Machado, Eduardo Caruso
Pereira, Antonio Roberto
dc.subject.por.fl_str_mv carbon balance; photosynthesis; plant respiration; aluminum tolerance
balanço de carbono; fotossíntese; respiração de plantas; tolerância ao Al.
topic carbon balance; photosynthesis; plant respiration; aluminum tolerance
balanço de carbono; fotossíntese; respiração de plantas; tolerância ao Al.
description The effects of aluminum (AD on the conversion efficiency and maintenance respiration coefficient of whole structure planta and their organs, roots and tops, were studied in two rice cultivars (Oryza sativa L.), IAC- 165 (tolerant) and IAC-899 (sensitive), and two maize hybrids (Zea mays L.), HS1227 (tolerant) and HS7777 (sensitive), through the carbon balance technique. Under Al stress the sensitive cultivars had a reduction of approximately 20% in the gross photosynthesis production and growth rate; for the tolerant plants such parameters practically were not affected. Under Al stress, all cultivars, both sensitive and tolerant, had the plants, roots and tops' respirations reduced in comparison with the non stressed ones. The root conversion efficiency (YR), in all cultivars under Al stress, increased by 12% to 16%, while the top conversion efficiency (A) practically was not affected. The increase in YR was about the same, both for tolerant and non tolerant cultivars, and for such it was not possible to use it for screening plants. The maintenance respiration coefficient also showed no relationships with tolerance to Al toxicity.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/13508
url https://seer.sct.embrapa.br/index.php/pab/article/view/13508
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/13508/7673
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.25, n.6, jun. 1990; 845-855
Pesquisa Agropecuária Brasileira; v.25, n.6, jun. 1990; 845-855
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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