Osmotic adjustment in maize cultivated in different soil tillage systems and water availability

Detalhes bibliográficos
Autor(a) principal: Bianchi, Cleusa Adriane Menegassi
Data de Publicação: 2005
Outros Autores: Bergonci, João Ito, Bergamaschi, Homero, Dalmago, Genei Antonio
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/7007
Resumo: Maize is a very sensible crop to water deficit, which is a frequent cause of reduction in its grain yield. The objective of this work was to verify the occurrence of osmotic adjustment in maize cultivated in different soil management systems and water availability. The maize was cropped in no-tillage (NT) and conventional tillage (CT), with irrigation and no-irrigation. For measurements of minimum leaf water potential, a pressure chamber was utilized. Osmotic adjustment was calculated as the difference between osmotic potentials at full turgor, in irrigated and non-irrigated plants. Highest values of minimum leaf water potential were found in plants cropped in NT, as a response to the highest soil potential on this cropping system. Pressure potential and the osmotic potential at full turgor were reduced as a response to water deficit, resulting on an osmotic adjustment in both cropping systems, with a highest intensity in the CT system. Minimum leaf water potential showed sensitivity to water deficit, which makes it a good indicator of plant water status on maize. Maize crop showed tolerance to water deficit through the mechanism of osmotic adjustment.
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spelling Osmotic adjustment in maize cultivated in different soil tillage systems and water availabilityAjuste osmótico em milho cultivado em diferentes sistemas de manejo de solo e disponibilidade hídricaZea mays; leaf water potential; water deficit; no-tillageZea mays; potencial de água na folha; déficit hídrico; plantio direto Maize is a very sensible crop to water deficit, which is a frequent cause of reduction in its grain yield. The objective of this work was to verify the occurrence of osmotic adjustment in maize cultivated in different soil management systems and water availability. The maize was cropped in no-tillage (NT) and conventional tillage (CT), with irrigation and no-irrigation. For measurements of minimum leaf water potential, a pressure chamber was utilized. Osmotic adjustment was calculated as the difference between osmotic potentials at full turgor, in irrigated and non-irrigated plants. Highest values of minimum leaf water potential were found in plants cropped in NT, as a response to the highest soil potential on this cropping system. Pressure potential and the osmotic potential at full turgor were reduced as a response to water deficit, resulting on an osmotic adjustment in both cropping systems, with a highest intensity in the CT system. Minimum leaf water potential showed sensitivity to water deficit, which makes it a good indicator of plant water status on maize. Maize crop showed tolerance to water deficit through the mechanism of osmotic adjustment.A cultura do milho é sensível ao déficit hídrico, e esta é uma causa freqüente de redução na produção de grãos. O objetivo deste trabalho foi verificar a ocorrência de ajuste osmótico em milho, cultivado em dois sistemas de manejo do solo, com diferentes disponibilidades hídricas. Os tratamentos consistiram do cultivo do milho em semeadura direta (SD) e convencional (SC), com irrigação de forma a manter a umidade do solo próxima à capacidade de campo, e sem irrigação. O ajuste osmótico foi obtido pela diferença do potencial osmótico hidratado entre as plantas irrigadas e sem irrigação. Os maiores valores de potencial mínimo de água na folha ocorreram em plantas cultivadas sob SD, em razão do maior potencial matricial da água no solo nesse sistema. O potencial de pressão e o osmótico hidratado diminuíram em conseqüência do déficit hídrico, o que determinou a ocorrência de ajuste osmótico em ambos os sistemas, que foi mais intenso em manejo convencional. Portanto, o potencial mínimo de água na folha demonstra ser um indicador adequado da condição hídrica das plantas de milho. A cultura apresenta tolerância ao déficit hídrico por meio do mecanismo de ajuste osmótico.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBianchi, Cleusa Adriane MenegassiBergonci, João ItoBergamaschi, HomeroDalmago, Genei Antonio2005-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/7007Pesquisa Agropecuaria Brasileira; v.40, n.7, jul. 2005; 645-651Pesquisa Agropecuária Brasileira; v.40, n.7, jul. 2005; 645-6511678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/7007/4055info:eu-repo/semantics/openAccess2014-09-22T17:01:53Zoai:ojs.seer.sct.embrapa.br:article/7007Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-22T17:01:53Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
Ajuste osmótico em milho cultivado em diferentes sistemas de manejo de solo e disponibilidade hídrica
title Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
spellingShingle Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
Bianchi, Cleusa Adriane Menegassi
Zea mays; leaf water potential; water deficit; no-tillage
Zea mays; potencial de água na folha; déficit hídrico; plantio direto
title_short Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
title_full Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
title_fullStr Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
title_full_unstemmed Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
title_sort Osmotic adjustment in maize cultivated in different soil tillage systems and water availability
author Bianchi, Cleusa Adriane Menegassi
author_facet Bianchi, Cleusa Adriane Menegassi
Bergonci, João Ito
Bergamaschi, Homero
Dalmago, Genei Antonio
author_role author
author2 Bergonci, João Ito
Bergamaschi, Homero
Dalmago, Genei Antonio
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Bianchi, Cleusa Adriane Menegassi
Bergonci, João Ito
Bergamaschi, Homero
Dalmago, Genei Antonio
dc.subject.por.fl_str_mv Zea mays; leaf water potential; water deficit; no-tillage
Zea mays; potencial de água na folha; déficit hídrico; plantio direto
topic Zea mays; leaf water potential; water deficit; no-tillage
Zea mays; potencial de água na folha; déficit hídrico; plantio direto
description Maize is a very sensible crop to water deficit, which is a frequent cause of reduction in its grain yield. The objective of this work was to verify the occurrence of osmotic adjustment in maize cultivated in different soil management systems and water availability. The maize was cropped in no-tillage (NT) and conventional tillage (CT), with irrigation and no-irrigation. For measurements of minimum leaf water potential, a pressure chamber was utilized. Osmotic adjustment was calculated as the difference between osmotic potentials at full turgor, in irrigated and non-irrigated plants. Highest values of minimum leaf water potential were found in plants cropped in NT, as a response to the highest soil potential on this cropping system. Pressure potential and the osmotic potential at full turgor were reduced as a response to water deficit, resulting on an osmotic adjustment in both cropping systems, with a highest intensity in the CT system. Minimum leaf water potential showed sensitivity to water deficit, which makes it a good indicator of plant water status on maize. Maize crop showed tolerance to water deficit through the mechanism of osmotic adjustment.
publishDate 2005
dc.date.none.fl_str_mv 2005-07-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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format article
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dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/7007
url https://seer.sct.embrapa.br/index.php/pab/article/view/7007
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/7007/4055
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.40, n.7, jul. 2005; 645-651
Pesquisa Agropecuária Brasileira; v.40, n.7, jul. 2005; 645-651
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
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instacron:EMBRAPA
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repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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