Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Acta Scientiarum. Agronomy (Online) |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/426 |
Resumo: | To evaluate the daily behavior of the water potential in corn and of sorghum plants submitted to water stress, relating with the leaf and ambient temperature, were cultivated, in individual pots in greenhouse, five plants of each species. The plants were kept at field capacity until they reached the stage of four leaves. Between that stadium and close to the wilting point the irrigation was suspended and were monitored daily the ambient temperature (Tam), the water potential in the leaf (Ψ folha) and the temperature on the leaf sheet (Tfoext). The plants whose leaves rolled up had their internal temperature measured (Tfoint). The average time of Ψ folha was calculated for both species relating them with Tfoex, Tfoint and the differences among those temperatures. Both species presented behaviors similar to Ψ folha and between 1pm to 3pm they showed the lowest Ψ folha. Despite the significant inverse relationship between Tfoext and Ψ folha, in corn, this relationship does not present enough precision to use the measure os Tfoex in the control of the water status of the plant and the Tfoint was inferior to the Tfoex, becoming a protection mechanism which allows the plant to maintain its metabolism. |
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Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426Relações entre o potencial e a temperatura da folha de plantas de milho e sorgo submetidas a estresse hídrico - DOI: 10.4025/actasciagron.v29i4.426águaanisohídricoisohídricoZea mays L.Sorghum bicolor L.To evaluate the daily behavior of the water potential in corn and of sorghum plants submitted to water stress, relating with the leaf and ambient temperature, were cultivated, in individual pots in greenhouse, five plants of each species. The plants were kept at field capacity until they reached the stage of four leaves. Between that stadium and close to the wilting point the irrigation was suspended and were monitored daily the ambient temperature (Tam), the water potential in the leaf (Ψ folha) and the temperature on the leaf sheet (Tfoext). The plants whose leaves rolled up had their internal temperature measured (Tfoint). The average time of Ψ folha was calculated for both species relating them with Tfoex, Tfoint and the differences among those temperatures. Both species presented behaviors similar to Ψ folha and between 1pm to 3pm they showed the lowest Ψ folha. Despite the significant inverse relationship between Tfoext and Ψ folha, in corn, this relationship does not present enough precision to use the measure os Tfoex in the control of the water status of the plant and the Tfoint was inferior to the Tfoex, becoming a protection mechanism which allows the plant to maintain its metabolism.Para avaliar o comportamento diário do potencial hídrico em plantas de milho e de sorgo submetidas a estresse hídrico, relacionandestádio e até próximo ao ponto de murcha a irrigação foi suspensa e foram monitoradas diariamente a temperatura ambiente (Tam), o poteo com as temperaturas foliar e ambiente, foram cultivadas, em vasos individuais em estufa, cinco plantas de cada espécie. Até o estádio fenológico de quatro folhas, o solo nos vasos foi mantido em capacidade de campo. Entre esse ncial hídrico da folha (Ψ folha) e a temperatura sobre a lâmina foliar (Tfoext). Nas plantas que apresentavam enrolamento das folhas, foram registradas as temperaturas (Tfoint) da face interna do limbo enrolado. Também foram calculadas as médias horárias dos Ψ folha para ambas as espécies relacionando-os com a Tfoext, a Tfoint e as diferenças entre essas temperaturas. Ambas as espécies apresentaram comportamentos semelhantes quanto ao Ψ folha e entre 13 e 15 horas verificou-se o menor Ψ folha. Apesar da significativa relação inversa entre a Tfoext e o seu Ψ folha, em milho essa relação não apresenta acurácia para emprego da Tfoext no monitoramento do status hídrico da planta e a Tfoint é inferior à Tfoext, tornando-se um mecanismo que permite à planta a manutenção de seu metabolismo.Universidade Estadual de Maringá2008-02-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42610.4025/actasciagron.v29i4.426Acta Scientiarum. Agronomy; Vol 29 No 4 (2007); 555-561Acta Scientiarum. Agronomy; v. 29 n. 4 (2007); 555-5611807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/426/277Júnior, Pedro Abel VieiraNeto, Durval DouradoOliveira, Ricardo Ferraz dePeres, Lázaro Eustáquio PereiraMartin, Thomas NewtonManfron, Paulo AugustoBonnecarrère, Reinaldo Antônio Garciainfo:eu-repo/semantics/openAccess2022-11-23T18:37:07Zoai:periodicos.uem.br/ojs:article/426Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2022-11-23T18:37:07Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 Relações entre o potencial e a temperatura da folha de plantas de milho e sorgo submetidas a estresse hídrico - DOI: 10.4025/actasciagron.v29i4.426 |
title |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 |
spellingShingle |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 Júnior, Pedro Abel Vieira água anisohídrico isohídrico Zea mays L. Sorghum bicolor L. |
title_short |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 |
title_full |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 |
title_fullStr |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 |
title_full_unstemmed |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 |
title_sort |
Relations between the potential and temperature of the corn and sorghum leafs submitted water stress - DOI: 10.4025/actasciagron.v29i4.426 |
author |
Júnior, Pedro Abel Vieira |
author_facet |
Júnior, Pedro Abel Vieira Neto, Durval Dourado Oliveira, Ricardo Ferraz de Peres, Lázaro Eustáquio Pereira Martin, Thomas Newton Manfron, Paulo Augusto Bonnecarrère, Reinaldo Antônio Garcia |
author_role |
author |
author2 |
Neto, Durval Dourado Oliveira, Ricardo Ferraz de Peres, Lázaro Eustáquio Pereira Martin, Thomas Newton Manfron, Paulo Augusto Bonnecarrère, Reinaldo Antônio Garcia |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Júnior, Pedro Abel Vieira Neto, Durval Dourado Oliveira, Ricardo Ferraz de Peres, Lázaro Eustáquio Pereira Martin, Thomas Newton Manfron, Paulo Augusto Bonnecarrère, Reinaldo Antônio Garcia |
dc.subject.por.fl_str_mv |
água anisohídrico isohídrico Zea mays L. Sorghum bicolor L. |
topic |
água anisohídrico isohídrico Zea mays L. Sorghum bicolor L. |
description |
To evaluate the daily behavior of the water potential in corn and of sorghum plants submitted to water stress, relating with the leaf and ambient temperature, were cultivated, in individual pots in greenhouse, five plants of each species. The plants were kept at field capacity until they reached the stage of four leaves. Between that stadium and close to the wilting point the irrigation was suspended and were monitored daily the ambient temperature (Tam), the water potential in the leaf (Ψ folha) and the temperature on the leaf sheet (Tfoext). The plants whose leaves rolled up had their internal temperature measured (Tfoint). The average time of Ψ folha was calculated for both species relating them with Tfoex, Tfoint and the differences among those temperatures. Both species presented behaviors similar to Ψ folha and between 1pm to 3pm they showed the lowest Ψ folha. Despite the significant inverse relationship between Tfoext and Ψ folha, in corn, this relationship does not present enough precision to use the measure os Tfoex in the control of the water status of the plant and the Tfoint was inferior to the Tfoex, becoming a protection mechanism which allows the plant to maintain its metabolism. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-02-11 |
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 |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/426 10.4025/actasciagron.v29i4.426 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/426 |
identifier_str_mv |
10.4025/actasciagron.v29i4.426 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/426/277 |
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 |
Universidade Estadual de Maringá |
publisher.none.fl_str_mv |
Universidade Estadual de Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Agronomy; Vol 29 No 4 (2007); 555-561 Acta Scientiarum. Agronomy; v. 29 n. 4 (2007); 555-561 1807-8621 1679-9275 reponame:Acta Scientiarum. Agronomy (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum. Agronomy (Online) |
collection |
Acta Scientiarum. Agronomy (Online) |
repository.name.fl_str_mv |
Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br |
_version_ |
1799305902187085824 |