Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange

Detalhes bibliográficos
Autor(a) principal: Santos, Osvaldir F. dos [UNESP]
Data de Publicação: 2017
Outros Autores: Lima, Sebastiao F. de, Paiva Neto, Vespasiano B. de, Piati, Gabriel L., Osorio, Christian R. W. de S., Souza, Hugo M. de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
DOI: 10.1590/1807-1929/agriambi.v21n12p822-827
Texto Completo: http://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827
http://hdl.handle.net/11449/163512
Resumo: The objective of this work was to evaluate leaf gas exchanges of sweet corn as a function of defoliation when submitted to different irrigation depths. The experimental design was randomized blocks in split-plot scheme, with four irrigation depths in the plots [50, 75, 100 and 125% of crop evapotranspiration (ETc)], and three levels of defoliation in the subplots (0%, control; 35%, removal of four fully expanded leaves; 100%, total removal of the leaves - section of the aerial part) with three replicates. Defoliation was manually performed when the plant had four fully expanded leaves. It was verified that the dephs of irrigation and defoliation levels affect leaf gas exchanges in sweet corn plants, allowing the conclusion that the plant tends to activate a mechanism of photosynthetic compensation, when subjected to leaf stress, which can vary according to the degree of severity and water availability to which it is submitted. The most expressive values of gas exchanges in sweet corn plants that did not have defoliation were generally observed at irrigation depths estimated between 87 and 99% ETc and, in the treatments with defoliation, regardless of the level, at irrigation depth of 125% ETc.
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spelling Defoliation of sweet corn plants under irrigation depths and its impact on gas exchangeZea mays L. var. saccharatawater stressphotosynthesisThe objective of this work was to evaluate leaf gas exchanges of sweet corn as a function of defoliation when submitted to different irrigation depths. The experimental design was randomized blocks in split-plot scheme, with four irrigation depths in the plots [50, 75, 100 and 125% of crop evapotranspiration (ETc)], and three levels of defoliation in the subplots (0%, control; 35%, removal of four fully expanded leaves; 100%, total removal of the leaves - section of the aerial part) with three replicates. Defoliation was manually performed when the plant had four fully expanded leaves. It was verified that the dephs of irrigation and defoliation levels affect leaf gas exchanges in sweet corn plants, allowing the conclusion that the plant tends to activate a mechanism of photosynthetic compensation, when subjected to leaf stress, which can vary according to the degree of severity and water availability to which it is submitted. The most expressive values of gas exchanges in sweet corn plants that did not have defoliation were generally observed at irrigation depths estimated between 87 and 99% ETc and, in the treatments with defoliation, regardless of the level, at irrigation depth of 125% ETc.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Estadual Paulista, Fac Ciencias Agron, Dept Engn Rural, Botucatu, SP, BrazilUniv Fed Mato Grosso do Sul, Campus Chapadao do Sul, Chapadao Do Sul, MS, BrazilUniv Fed Vale Sao Francisco, Colegiado Acad Engn Agron, Campus Ciencias Agr, Petrolina, PE, BrazilUniv Estadual Paulista, Fac Ciencias Agron, Dept Engn Rural, Botucatu, SP, BrazilUniv Federal Campina GrandeUniversidade Estadual Paulista (Unesp)Universidade Federal de Mato Grosso do Sul (UFMS)Univ Fed Vale Sao FranciscoSantos, Osvaldir F. dos [UNESP]Lima, Sebastiao F. dePaiva Neto, Vespasiano B. dePiati, Gabriel L.Osorio, Christian R. W. de S.Souza, Hugo M. de2018-11-26T17:42:20Z2018-11-26T17:42:20Z2017-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article822-827application/pdfhttp://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827Revista Brasileira De Engenharia Agricola E Ambiental. Campina Grande Pb: Univ Federal Campina Grande, v. 21, n. 12, p. 822-827, 2017.1807-1929http://hdl.handle.net/11449/16351210.1590/1807-1929/agriambi.v21n12p822-827S1415-43662017001200822WOS:000416041100002S1415-43662017001200822.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira De Engenharia Agricola E Ambientalinfo:eu-repo/semantics/openAccess2024-04-30T14:00:36Zoai:repositorio.unesp.br:11449/163512Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:27:10.135127Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
title Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
spellingShingle Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
Santos, Osvaldir F. dos [UNESP]
Zea mays L. var. saccharata
water stress
photosynthesis
Santos, Osvaldir F. dos [UNESP]
Zea mays L. var. saccharata
water stress
photosynthesis
title_short Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
title_full Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
title_fullStr Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
title_full_unstemmed Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
title_sort Defoliation of sweet corn plants under irrigation depths and its impact on gas exchange
author Santos, Osvaldir F. dos [UNESP]
author_facet Santos, Osvaldir F. dos [UNESP]
Santos, Osvaldir F. dos [UNESP]
Lima, Sebastiao F. de
Paiva Neto, Vespasiano B. de
Piati, Gabriel L.
Osorio, Christian R. W. de S.
Souza, Hugo M. de
Lima, Sebastiao F. de
Paiva Neto, Vespasiano B. de
Piati, Gabriel L.
Osorio, Christian R. W. de S.
Souza, Hugo M. de
author_role author
author2 Lima, Sebastiao F. de
Paiva Neto, Vespasiano B. de
Piati, Gabriel L.
Osorio, Christian R. W. de S.
Souza, Hugo M. de
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade Federal de Mato Grosso do Sul (UFMS)
Univ Fed Vale Sao Francisco
dc.contributor.author.fl_str_mv Santos, Osvaldir F. dos [UNESP]
Lima, Sebastiao F. de
Paiva Neto, Vespasiano B. de
Piati, Gabriel L.
Osorio, Christian R. W. de S.
Souza, Hugo M. de
dc.subject.por.fl_str_mv Zea mays L. var. saccharata
water stress
photosynthesis
topic Zea mays L. var. saccharata
water stress
photosynthesis
description The objective of this work was to evaluate leaf gas exchanges of sweet corn as a function of defoliation when submitted to different irrigation depths. The experimental design was randomized blocks in split-plot scheme, with four irrigation depths in the plots [50, 75, 100 and 125% of crop evapotranspiration (ETc)], and three levels of defoliation in the subplots (0%, control; 35%, removal of four fully expanded leaves; 100%, total removal of the leaves - section of the aerial part) with three replicates. Defoliation was manually performed when the plant had four fully expanded leaves. It was verified that the dephs of irrigation and defoliation levels affect leaf gas exchanges in sweet corn plants, allowing the conclusion that the plant tends to activate a mechanism of photosynthetic compensation, when subjected to leaf stress, which can vary according to the degree of severity and water availability to which it is submitted. The most expressive values of gas exchanges in sweet corn plants that did not have defoliation were generally observed at irrigation depths estimated between 87 and 99% ETc and, in the treatments with defoliation, regardless of the level, at irrigation depth of 125% ETc.
publishDate 2017
dc.date.none.fl_str_mv 2017-12-01
2018-11-26T17:42:20Z
2018-11-26T17:42:20Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827
Revista Brasileira De Engenharia Agricola E Ambiental. Campina Grande Pb: Univ Federal Campina Grande, v. 21, n. 12, p. 822-827, 2017.
1807-1929
http://hdl.handle.net/11449/163512
10.1590/1807-1929/agriambi.v21n12p822-827
S1415-43662017001200822
WOS:000416041100002
S1415-43662017001200822.pdf
url http://dx.doi.org/10.1590/1807-1929/agriambi.v21n12p822-827
http://hdl.handle.net/11449/163512
identifier_str_mv Revista Brasileira De Engenharia Agricola E Ambiental. Campina Grande Pb: Univ Federal Campina Grande, v. 21, n. 12, p. 822-827, 2017.
1807-1929
10.1590/1807-1929/agriambi.v21n12p822-827
S1415-43662017001200822
WOS:000416041100002
S1415-43662017001200822.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Revista Brasileira De Engenharia Agricola E Ambiental
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 822-827
application/pdf
dc.publisher.none.fl_str_mv Univ Federal Campina Grande
publisher.none.fl_str_mv Univ Federal Campina Grande
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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dc.identifier.doi.none.fl_str_mv 10.1590/1807-1929/agriambi.v21n12p822-827